@article { author = {Mostafa et al., Slim}, title = {Some Physical and Chemical Conditions Affecting the Distribution of Aquatic Beetles: Lake of Sidi Boughaba as a Case Study (Kénitra, Morocco)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {1-13}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.185136}, abstract = {Wetlands present an important diversity of life and are very productive. Many biotic and abiotic factors intervene in their functioning. Thus, understanding this functioning requires, among other characteristics, physicochemical characterization of their waters and the determination of the specific structure of the stand that inhabits those environments. In this work, the authors were interested in the characterization of the waters of Lake Sidi Boughaba, wetland, and biological reserve registered with the RAMSAR convention. This lake is made up of three parts of unequal volume and duration of flooding. The results showed that the studied living environment is very heterogeneous physicochemical and that from one biotope to another the values of the majority of the physicochemical parameters can vary from single, to double, to three times, and even more. Only the pH, oxygen, and ammonium content are relatively stable. In addition, the results showed that the aquatic beetle population of the prospected environment consists of 34 species and subspecies, grouped into 9 systematic families and that the Dytiscidae family and the Hydrophilidae family are the most represented. Likewise, the biotypological analysis of the population of beetles collected showed the distribution of the 34 inventoried species that are divided into four groups and that, among the 16 physicochemical parameters studied 10 intervene the determination of the specific structure of each of the groups of 'identified species.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_185136.html}, eprint = {https://ejabf.journals.ekb.eg/article_185136_5789ccaad98ab9baa0ba7e8d53662afe.pdf} } @article { author = {Nguyen Tan, Dat}, title = {How do livelihood assets affect the environmental sustainability of shrimp farming? A case study in Tra Vinh province, Vietnam.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {15-41}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.185137}, abstract = {This study is based on the DFID’s sustainable livelihood framework, which lists five types of capitals to analyze the current status of shrimp farmers’ livelihood assets: human capital, natural capital, physical capital, social capital, and financial capital. The data collected were based on addressing  300 shrimp-farmer households in 2019 in Tra Vinh province through questionnaire interviews and transect walks. The study was conducted to estimate the effects of five forms of livelihood capitals and 17 indicators on the environmental sustainability of shrimp farming measured by 19 criteria. Results revealed that three forms of livelihood capitals and five indicators had statistical significance affecting the environmental sustainability of shrimp farming in Tra Vinh. In addition, it was found that using groundwater in shrimp farming was not environmentally sustainable. Conversely, having reservation ponds had a positive impact on environmental sustainability.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_185137.html}, eprint = {https://ejabf.journals.ekb.eg/article_185137_a1b0e4abf841c283a3801841a586bc46.pdf} } @article { author = {Azmy et al., Esraa}, title = {Geophysical interpretation for delineating groundwater and subsurface structure in the East of Cairo City, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {43-73}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.186025}, abstract = {This study aimed to delineate groundwater and the structural trends in the East of Cairo City. For this aim, we carried out different geophysical approaches such as gravity, magnetic, and electric methods. For the gravity and magnetic data analysis, we used filtering, Euler deconvolution, and radially power spectrum techniques. In addition, 3-D modeling was performed on the magnetic data only. The radial power spectrum technique shows that the depths of the surface anomalies corresponding to the short wavelength are 0.48 and 0.5 km. While, the depths of the surface anomalies corresponding to the long wavelength are ranging from 2.74 to 2.33 km from gravity and magnetic interpretation, respectively. The Euler deconvolution revealed that the investigation area was under the effect of several fault trends; a major NW-SE trend and NE-SW and NW-SE as minor trends for gravity data. While the fault trends are in N-S and NE-SW directions for RTP magnetic data. The 3-D modeling results show that the basement depth was fluctuating between 1.186 to 1.657 Km. The principal tectonic deformations of the investigating area are towards the E-W, N-S, and NE-SW trends. The gravity and magnetic techniques in this study revealed that different faults dissect the area of trends NE-SW matching the Gulf of Aqaba direction, NW-SE matching the Gulf of Suez, N-S matching the River Nile system, and E-W matching the Mediterranean tectonics. The geo-electrical method was used to investigate groundwater presence. Regarding the seismicity, the area can be considered moderate to highly active. Most of the area faults are active except in the area's southern part. So, this part can be considered the most suitable and safe part for construction.  }, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_186025.html}, eprint = {https://ejabf.journals.ekb.eg/article_186025_95675eb849e818cd42cc14356cbf3367.pdf} } @article { author = {M. El-Gaar et al., Dalia}, title = {Health risk assessment of heavy metals accumulation and Health status of O. niloticus from two Egyptian lakes}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {75-86}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.186479}, abstract = {  Water resources have become world social and economic concerns. Lake Nasser provides more than 95% of the Egyptian freshwater funds. Wadi Al- Rayan lakes are man-made with a vital role in irrigation water and fisheries. The present study was aimed to investigate and compare the effect of heavy metals (Fe, Zn, Mn, Cu, Pb and Cd) accumulation in muscles, liver and gills on the health status of O. niloticus collected from both lakes and the potential human health hazard of consuming those fish. The results demonstrated that the accumulation of different metals arranged in the following order; Fe˃ Zn˃ Mn ˃Cd˃ Cu> Pb in Nasser Lake, while the order was Fe˃ Zn˃ Mn ˃Cu˃ Pb>Cd in Wadi Al-Rayan Lake. The metal pollution index (MPI) in fish tissues followed the order:  liver > gills > muscles. Moreover, the biochemical indices of O. niloticus from both Nasser and Wadi Al-Rayan Lakes showed a significant alteration due to metal pollution. Moreover, the human health hazard index recorded an adverse health effect for habitual fish consumers from Wadi Al-Rayan Lake during both seasons, while the same hazard was recorded in spring for habitual fish consumers from Nasser Lake which yield an alarming concern for fish consumers’ health. }, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_186479.html}, eprint = {https://ejabf.journals.ekb.eg/article_186479_d5e1b1c27f7f66ebc090d12f234a9ffc.pdf} } @article { author = {N. Hussein et al., Mona}, title = {Characterization of peroxisome proliferator-activated receptor at different stages of development of intestine, liver, spleen, pancreas and posterior kidney of the loach (Misgurnus anguillicaudatus)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {87-104}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.186510}, abstract = {The loach is one of the most important fish species in aquaculture in China. The study of peroxisome proliferator-activated receptors (PPARs) will be essential for the determination of the functional role of the PPARα and PPARγ in loach fish. We used immunohistochemistry for PPARα and PPARγ at some stages of development beginning from the age of 1 month till the age of 15 months. Our result indicated that the expression of  PPARα and PPARγ was found in; columnar cells lining intestinal folds, hepatocytes, blood sinusoids in the liver, pancreatic islets, pancreatic acini, the whole spleen and epithelial cells lining renal tubules of the kidney. The expression pattern of both PPARα and PPARγ was low at the age of one month, then reach its highest level at the age of 2 months. Then it declines at the age of 5 months. Then it re-increase at the age of 7 months and became low in older ages. The expression of PPARα was higher in comparison with PPARγ. }, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_186510.html}, eprint = {https://ejabf.journals.ekb.eg/article_186510_b71babd8f664dfb3130afce6a9e40ff9.pdf} } @article { author = {El-Dahhar et al., Alaa}, title = {Annual phytoplankton variability in the Eastern Harbour, Alexandria (Egypt)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {105-118}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.186566}, abstract = {To realize the specific-time importance of phytoplankton variability in the semi-enclosed marine basin (Eastern Harbour of Alexandria), the present study based on a short-time scale was conducted during a year cycle. The harbour is characterized by abrupt temporal variations of multitudes of different environmental variables and experiences a high degree of pressure from natural and anthropogenic activity. The instability of the system and rapid phytoplankton variations hinder the full understanding of the mechanism that underlying the differences in the community composition and production. The community structure responded quickly to modifications, consequently, displacement of different species occur in a couple of days. The study stresses the crucial role of temperature as a steering factor in determining the timing, magnitude, and composition of the spring bloom. Water mixing conditions and organic matter concentrations influence deeply the phytoplankton variability. The study examines the ecology of the massive blooms of potentially harmful/toxic species of different classes.}, keywords = {Bloom,diatoms,Dinoflagellates,Environmental parameters,Weekly collection}, url = {https://ejabf.journals.ekb.eg/article_186566.html}, eprint = {https://ejabf.journals.ekb.eg/article_186566_a78786e5e016dcf69f3ce84dd0ca9898.pdf} } @article { author = {A. Dar et al., Mahmoud}, title = {The occurrence of some carcinogenic metals in sediments and their effluences on some edible bivalves at Great Bitter and Timsah lakes, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {119-138}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.186594}, abstract = {The occurrence of some carcinogenic metals; Cu, Ni, Pb and Cd was investigated in sediment samples collected from 12 stations at Great Bitter and Timsah lakes. In the same time, two of the most famous edible bivalve species (Ruditapes decussatus and Paratapes undulatus) live buried in these sediments were chosen for measuring the same metals within their edible tissues in order to investigate the permissibility limits for human consumption. The bio-available forms of these metals were measured in the bulk sediments and the finest fractions (Ø3, Ø4 and Ø5) and in the edible tissues (flesh) of the selected bivalve individuals using a flame atomic absorption spectrophotometer (AAS). The finest fraction (Ø5) recorded the highest averages of most carcinogenic metals at Great Bitter and Timsah lakes with significant occurrences of Cd at both lakes. Carcinogenic Cd in the edible tissues of P. undulates and R. decussatus showed neglected low contents at the Great Bitter and Timsah lakes in spite of its very high contents in the surrounding sediment layer. Ni, Cu, and Pb averages in the edible tissues of P. undulates at the Great Bitter lake were 1.32, 0.23 and 0.37 µg/g wet wt. respectively. The averages of Ni, Cu and Pb in R. decussatus at Timsah Lake, were; 1.30, 0.24 and 0.95 µg/g wet wt. and in P. undulates were; 0.79, 0.14, and 1.15 µg/g wet wt. respectively. Bio-sediment accumulation factor (BSAF) in the different bivalve species at the Great Bitter and Timsah lakes were much lower than unity (<<<1.0) indicating that the bivalves tend to accumulate their needs only from the surrounding environment. Finally, the investigated metals in the edible tissues of the different bivalve species are within the permissible safe limits for human consumption except for Pb that exceeds these limits and showed a slight hazard to health risk.}, keywords = {Carcinogenic metals,Great Bitter Lake,Timsah lakes,bivalves,bioaccumulation,permissibility limits,BSAF}, url = {https://ejabf.journals.ekb.eg/article_186594.html}, eprint = {https://ejabf.journals.ekb.eg/article_186594_fc699940103ad5000c35682468e79e58.pdf} } @article { author = {A. Reyad et al., Yasmin}, title = {Bioaccumulation of some heavy metals in water and tissues of naturally infected Oreochromis niloticus from two polluted sites in Egypt, with reference to related oxidative stress}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {139-157}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.186820}, abstract = {The present research was planned to assess the harmful effects of heavy metals as well as antioxidant alterations of Oreochromis niloticus collected from two polluted fish farms located in Abbassa and Manzala (areas A and B, respectively) in Egypt. They were compared with reference site in central laboratory for aquaculture researchers during the summer season, 2020. A total number of 75 fish collected from all sites was subjected to clinical, postmortem, and bacteriological examination. Water parameters, as well as heavy metals (arsenic, manganese, and nickel) in water, serum, and tissues (muscle, gills, and liver), were evaluated. In addition, antioxidant enzymes (SOD and CAT) and (MDA) were assessed in the serum of O. niloticus. Bacterial isolates, Aeromonas hydrophila, were identified in fish at both localities, and the recorded mortality rate was about 30% and 5% in areas A and B, respectively. The levels of As in water samples from both polluted areas were higher than the permissible limits. In addition, serum of O. niloticus showed a significant decrease in the concentrations of Ni in both polluted areas. In addition, a significant decrease in the mean levels of Ni and As was found in the gills and muscles of O. niloticus in both polluted areas.  Moreover, a significant decrease in CAT, combined with a significant increase of SOD activities was observed in polluted area A.}, keywords = {Heavy metals,Water Pollution,Antioxidant enzymes Oreochromis niloticus,Aeromonas hydrophila,Antioxidant enzymes}, url = {https://ejabf.journals.ekb.eg/article_186820.html}, eprint = {https://ejabf.journals.ekb.eg/article_186820_3d9e036fa53078a3904577a453aa8fe6.pdf} } @article { author = {M. El-Agri et al., Asmaa}, title = {Heavy Metal Bioaccumulation and Related Histopathological Changes in Gills, Liver and Muscle of Solea aegyptiaca Fish Inhabiting the Lake Qarun, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {159-183}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.187056}, abstract = {Pollution of Lake Qarun with heavy metals has become a more serious concern during recent years as it affects the physicochemical characteristics of the water, sediments and biological components and may damage aquatic organisms as well. Lake Qarun receives the agricultural and sewage wastewater loaded with heavy metals through two main drains; El-Batts and El-Wadi.  Therefore, an annual increase in the accumulation of pollutants and heavy metals has been detected in all its components (e.g. water, sediment and fish). The present study aimed to evaluate the seasonal variation of heavy metals’ contents (Fe, Cu, Zn, Cd, Pb and Ni) in water and the bioaccumulation factor of these heavy metals in Solea aegyptiaca fish samples, collected from Lake Qarun. Thus, information was provided regarding histological changes in gills, liver and muscle organs. This study was carried out along Lake Qarun at four sites (Eastern, Southern, Northern and Western) during the winter and summer seasons, 2019. The results revealed that summer was higher in heavy metal concentration in water than winter. Additionally, the eastern and southern sectors showed increased water concentration of heavy metals. Concerning fish samples, the present study exhibited that, the maximum values of bioaccumulation factor were recorded in the gills and liver, whereas the minimum values were observed in the muscles. The gills of Solea aegyptiaca accumulate higher levels of Zn, pb and Ni, while, Fe, Cu and Cd accumulated mainly in the liver. Results showed obvious histopathological alternations and clear damage in gills, liver and muscles of Solea aegyptiaca collected from the eastern and southern sectors of Lake Qarun.}, keywords = {Heavy metals,bioaccumulation factor,histological changes,Solea aegyptiaca,Lake Qarun}, url = {https://ejabf.journals.ekb.eg/article_187056.html}, eprint = {https://ejabf.journals.ekb.eg/article_187056_ba3175a36ebed14e4fd8f940860451c9.pdf} } @article { author = {Asghar Mahessar et al., Ali}, title = {Population Assessment and Conservation Strategies of the Indus River Dolphin, Platanista gangetica Minor, in Indus River Sindh, Pakistan}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {185-200}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.187233}, abstract = {Indus Blind Dolphin is endangered species sighted in the Indus River from the Indus delta upstream to the Himalayan foothills prior to building barrages but the maximum number of this mammal is found in Guddu to Sukkur reach and lowest number at upstream of Guddu barrage and downstream of Sukkur barrage. Driving forces for water and dolphin reserve conservation are an agriculture-environmental trade-off, water use and alteration of rivers for irrigation and agriculture and inadequate consideration on the habitat of highly valuable species such as Platanista gangetica minor, water demand increase with urban development and industrial activities, water pollution from Industries and agriculture wastewater, fishery-dolphin conflict causes physical damage to dolphins by boat and unintended dolphins/fish catch by gillnet.This paper presents the assessment of threats to Indus dolphin population growth, water quality, and other risk activities in stretch Guddu to Sukkur barrages. The total 1419 Indus dolphin was counted during a survey of dolphin in 2019, while918 in2011 respectively between Guddu and Sukkur Barrages. As result, 501 Indus dolphin number has increased in a period of 8 years. The analyzed results reveal that all the tested parameters ie. pH; Cond, TDS; Cl, TH, Alk, SO4, and NO2 are within the permissible limits as per standards NEQS and WHO. Moreover, the Standard Deviation of all parameters shows low deviation at different locations. The correlation matrix of all parameters of collected samples. The pH has a very strong correlation with NO2, and SO4 has a strong relation with conductivity and total hardness, and alkalinity.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_187233.html}, eprint = {https://ejabf.journals.ekb.eg/article_187233_2fbea0a5a49cbebd613d3c8af51c04c2.pdf} } @article { author = {Das, Dipak and Banik, Sukanta}, title = {New reports of the catfish Sperata seenghala (Sykes, 1839) from Gomati River of Tripura, India}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {201-209}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.187693}, abstract = {The natural distribution of Sperata seenghala (Sykes, 1839) is expanded here with four specimens collected from Gomati River in Kakraban locality under Gomati district of Tripura. This record, the first time for this species in Gomati River within the river basin of Tripura, a small hilly state of the North-Eastern part of India. The main meristic features and morphometric variables of the studied specimens are given. The findings may be utilized for assessing natural population stocks of S. seenghala in Gomati river of Tripura which is one of the most important freshwater resources as well as a fish genetic resource of the state.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_187693.html}, eprint = {https://ejabf.journals.ekb.eg/article_187693_886931b3d4905b3ea0b75823bc9db3b4.pdf} } @article { author = {A. Abdelaziz et al., Yasmen}, title = {Morphological and molecular characterizations of two Acanthamoeba spp. from tap water in Nasr City, Cairo Governorate, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {211-220}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.187698}, abstract = {Providing suitable drinking water for human use is a major goal in all countries, and contamination of drinking water with microorganisms represents a great danger to human health. Free-living amoebae (FLAs, Pathogenic) are found in all natural and manufactured environments, including aquatic environments. Several FLAs such as Acanthamoeba spp. infect humans, causing dangerous diseases. The purpose of this investigation was to search about FLAs in tap water in Nasr City, Cairo.  FLAs were detected in 59 (53.63 %) out of 110 tap water samples which were morphologically identified as two Acanthamoeba spp. The molecular identification to the species level was carried out, using a simple PCR technique and DNA sequencing.  Acanthamoeba spp. were recorded in the gene bank under accession numbers Acanthamoeba MT944118 and Acanthamoeba MT944119.}, keywords = {Acanthamoeba,morphological,Molecular,Characterization}, url = {https://ejabf.journals.ekb.eg/article_187698.html}, eprint = {https://ejabf.journals.ekb.eg/article_187698_df0da18973d1e8646dced373bd0924a9.pdf} } @article { author = {S. Binnaser, Yaser}, title = {Global Warming, Marine Invertebrates, and Saudi Arabia Coast on the Red Sea: An updated review}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {221-240}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.187702}, abstract = {Continuing humanitarian activities at their current pace will increase the accumulation of greenhouse gases emissions, as indicated by climate change scenarios proposed by many researchers. It is believed that anthropogenic CO2 is the primary responsible for global warming in terrestrial environments and this rise led to the absorption of CO2 in the oceans, which increases the dangers marine animals may face during the coming decades. In addition to the high level of seawater, high water temperature, lack of oxygen, and salinity increase, it is also expected that the concentration of CO2 will rise so that the chemistry of the seawater will move towards acidity. These impacts may have dire consequences on marine ecosystems and the biodiversity of marine organisms. It is believed that marine invertebrates (especially marine invertebrates with carbonic structures), will be highly vulnerable to global warming, threatening these species exist in their current locations or perhaps expose them to extinction. The Red Sea is a miniature ocean characterized by its biodiversity and the presence of a large number of coral reef communities. It is considered one of the most elevated marine systems in its temperature and salinity, but the researches on the impact of climate change on marine invertebrates are very few, especially in the middle region of the coast in the Kingdom of Saudi Arabia, which is the region that we invite researchers to shed light on.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_187702.html}, eprint = {https://ejabf.journals.ekb.eg/article_187702_57c1403a29b279c33a9ccc8148324a3c.pdf} } @article { author = {S. Ahmed et al., Kassem}, title = {Age, growth and mortality of the Bartail Flathead (Platycephalus indicus) in Bardawil lagoon, North Sinai, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {241-252}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.187867}, abstract = {Age, growth, and mortality of bartail flathead (Platycephalus indicus) were studied from a small-scale fishery of Bardawil lagoon, North Sinai, Egypt. A total of 947 specimens of Platycephalus indicus varied from 17.9 to 52.1 cm TL with weights ranging between 27.6 and 1003.7 g were collected from August to December during two fishing seasons 2019-2020.  A subsample of 654 specimens was taken for age determination using otoliths readings. The relationship between length and weight was W = 0.002 L3.3402 (R2 = 0.98) indicating positive allometric growth. Age was determined and age groups 0 to 5 years were observed. Growth in length and weight at the end of each year of life was calculated.  The growth parameters of von Bertalanffy equation were calculated as L∞ = 59.98 cm TL, K = 0.34 yr-1, t0 = -0.44 year and W∞ = 1737.9 g. The growth performance index was calculated as φ = 3.09 for length and φ= 1.69 for weight. Mortality rates were 1.152 yr-1, 0.482 yr-1 and 0.67 yr-1 for total, natural and fishing mortality, respectively. The current exploitation rate (E) was 0.583 for both sexes combined.}, keywords = {Age,Growth,mortality,Platycephalus indicus,Bardawil Lagoon,Egypt}, url = {https://ejabf.journals.ekb.eg/article_187867.html}, eprint = {https://ejabf.journals.ekb.eg/article_187867_555fd6d05349a149853d68e2e991c363.pdf} } @article { author = {O. Barakat et al., Rania}, title = {Role of exogenous thyroxin hormone on eggs, thyroid gland development and growth performance of the monosex Nile tilapia, Oreochromis niloticus Larvae}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {253-269}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.188443}, abstract = {The present study was conducted to study the effect of exogenous thyroxin hormone on thyroid gland development and to determine the concentration of this hormone in the tissues of eggs, which affects the growth performance of tilapia larvae. The eggs and larvae were exposed to different doses of thyroxin solution from 0.025 mg/l to 0.1 mg/L and immersed in that solution for 1 hr. The present results showed that the level of thyroxin (T4) was higher in the newly hatched eggs then gradually decreased to the lowest level 30±0.04 mg /g wet weight (wt) after 96 hrs of treatment. Both treated larvae and the control group were similar in their concentration of total thyroxin at the period ranging from 3–7 days of post-hatching. The level of thyroxin (T4) was gradually increased after 17 days of post-hatching and reached the highest value of 8.38±2.31 mg/g wet wt. This level decreased and reached the lowest value of 1.97±0.79 mg/g wet wt after 27 days of post-hatching. The histological evidence of thyroxin on the thyroid gland showed that the thyroid follicles of the treated fish with thyroxin have more developed than that of the untreated fish (control group). }, keywords = {Thyroid gland,thyroxin,Growth,Oreochromis niloticus larvae}, url = {https://ejabf.journals.ekb.eg/article_188443.html}, eprint = {https://ejabf.journals.ekb.eg/article_188443_218872d301a27cfdf7c20deb035c2157.pdf} } @article { author = {S. Binnaser, Yaser}, title = {Impact of Temperature Elevation on Seawater Snail Planaxis sulcatus}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {271-284}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.188964}, abstract = {     To assess the effect of temperature on wet weight, shell length, and shell aperture of seawater snail Planaxis sulcatus, an experimental trial was conducted to examine 72 samples of this species. The specimens were collected from the area of Al-Rayis coast on the western side of Saudi Arabia and were divided into 3 groups;  A, B, and C (24 snails/group). Group A was the control group. Group B was treated by increasing water temperature about 5°C above the control group, and about 10°C above the control group for group C. There were no significant differences in weekly wet weight measurements with respect to the intragroup comparison and the intergroup comparison of the three groups. However, regarding shield length, it increased at week 1 with a pairwise comparison of weekly records showing only a significant difference between the 1st week and that of the onset of the study in group A. While, in group B, results showed only a significant difference between week 3 and week 6, and no significant difference was detected in group C. In addition, no significant differences were recorded when the 3 groups’ shield lengths were compared. Hence, it is recommended to conduct complex experiments that depend on exposing snails to several climate change factors, such as increased acidity and salinity in addition to high temperature.  }, keywords = {Planaxis sulcatus,Elevated temperature,Global Warming,Climate Change,Red Sea}, url = {https://ejabf.journals.ekb.eg/article_188964.html}, eprint = {https://ejabf.journals.ekb.eg/article_188964_a4699957c657c64932ffb2a8724ded58.pdf} } @article { author = {Farida Parvin et al., Most.}, title = {Growth, maturity, condition, size at sexual maturity and mortality of the Banded gourami Trichogaster fasciata from the Ganges River, Northwestern Bangladesh}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {285-299}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.189004}, abstract = {The present study depicts the first comprehensive description on population structure, growth pattern (length-weight relationships, LWRs and length-length relationships, LLRs), condition factor (allometric, KA; Fultonʹs, KF; relative, KR and relative weight, WR), maturity (size at first sexual maturity; Lm), form factor (a3.0) and natural mortality (Mw) of Trichogaster fasciata (Bloch and Schneider, 1801)in the Ganges River, Northwestern Bangladesh. In addition, asymptotic weight (Wα), a3.0, Lm and Mw of this fish species from worldwide different water bodies were calculated based on the maximum total length. Samples of T. fasciata were collected from the fisher’s catch from August 2015 to July 2016 using cast net (mesh size ranges: 1.5 - 2.0 cm). For each individual, total length (TL) and body weight (BW) were measured using digital slide calipers and electronic balance with 0.01 cm and 0.01 g accuracy, respectively. A total of 278 individuals were analyzed, where the minimum and maximum TL were 3.3 cm and 9.9 cm, respectively and BW was 1.1 g and 22.04 g, correspondingly. The highest number (32.4%) of its population stands at 6.0 cm to 7.0 cm TL size group. The b value of LWR indicated negative allometric growth. Fulton′s condition factor (KF) is the best condition and WR showed significant dissimilarity from 100, signifying the balanced habitat for T. fasciata in the Ganges River. The a3.0 was 0.0214, the Lm was 5.91 cm TL and Mw was 1.35 year-1 of T. fasciata in the Ganges River. These findings will be very effective for its sustainable management in the Ganges River and connecting ecosystems.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_189004.html}, eprint = {https://ejabf.journals.ekb.eg/article_189004_ae087f55b296f99344ee657a1bcbf591.pdf} } @article { author = {A. Mansour et al., Sara}, title = {Impact of phenolic compounds on free amino acid contents and electrophoretic patterns of the Nile Tilapia, Oreochromis niloticus}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {301-312}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.189034}, abstract = {The present research was designed to determine the free amino acids (FAAs) composition and electrophoretic protein patterns by using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) in  Oreochromis niloticus exposed to 1/10 LC50-96 hrs of phenol and nonylphenol ethoxylate 9 (NPEO 9) under laboratory condition for 4 weeks, in an attempt to develop sensitive bio-indicators for evaluation of pollution effects. Variations of FAAs were apparent in both treated groups. Significant increases were recorded in all individual amino acids including essential and non-essential ones, except for proline for both treated groups and leucine for phenol exposed fish group where they decreased significantly. The electrophoretic analysis of protein of the skeletal muscle homogenate using SDS-PAGE indicated that the control group yielded 10 fractions of molecular masses between 166 and 23 kDa. A total number of 9 bands were separated from fish of phenol group; they were varied from 168 to 23 kDa. However, 6 bands only were separated from fish of the NPEO 9 group; they were varied from 157 to 28 kDa. The muscle protein extract from fish of the phenol group showed five unique bands (168, 96, 68, 52, and 39 kDa). Moreover, fish that were exposed to NPEO 9 group showed three unique bands (157, 92, and 72 kDa). The highest similarity index "S" value observed between phenol and control groups was 0.37, followed by 0.33 between NPEO 9 group and the control one. This could be an indicator of changes in protein metabolism due to phenol and NPEO 9 pollution.  }, keywords = {Phenolic compounds,Oreochromis niloticus,Free amino acids SDS-PAGE,Electrophoretic Protein}, url = {https://ejabf.journals.ekb.eg/article_189034.html}, eprint = {https://ejabf.journals.ekb.eg/article_189034_9928068f6596a01d37f595d2d96b8953.pdf} } @article { author = {Ali et al., Md. Nowsher}, title = {Reproductive Biology of the Silver Hatchet Chela cachius (Hamilton 1822) in a Perennial Water Body in Bangladesh.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {313-327}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.189056}, abstract = {The reproductive biology of the silver hatchet chela, Chela cachius, was addressed in the present study. A total of 1200 specimens were caught by fine-meshed seine nets from a large perennial water body in Bangladesh Agricultural University Campus, Mymensingh. The gonadosomatic index and the histological examination suggested that the spawning seasons of C. cachius were from February to May and from July to September. Based on histological examination, nine stages of oocyte development were determined; namely, early perinucleolus, late perinucleolus, yolk vesicle, primary yolk, secondary yolk, tertiary yolk, migratory nucleus, premature and mature stage. The absence of postovulatory follicles and hydrated eggs and the presence of two modes of eggs in the mature ovaries indicated that C. cachius was a single spawner, and its spawning frequency or strategy was a synchronous type. The average fecundity was 1708±838.86 having a standard length of 49±2.89 mm in the first season (February to May) and 1997.33±889.92, whereas the standard length was 46.66±1.53 mm in the second season (from July to September). The findings of the present study might be helpful for induced breeding of the species for commercial purposes as well as for management of the natural population (banning/restriction of fishing during spawning season) of C. cachius.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_189056.html}, eprint = {https://ejabf.journals.ekb.eg/article_189056_10550fa60ed2c6742463c3cf2f6d1f12.pdf} } @article { author = {Saha et al., Purbali}, title = {Climatic Variability and Diversification in Fishery Livelihood- a Case Study of Puffer Fish Fishery along South-Eastern Arabian Sea}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {329-340}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.189058}, abstract = {Impacts of climate variability and resulting changes in aquatic ecosystems have caused a rapid shift in the spatial distribution of species. This shift forces diversification in livelihood options among the fishers. Many resources are emerging as new fishery which could be the indicator of changes in the food web and ecosystems as a whole due to climatic variability coupled with changes in exploitation patterns. One of the emerging non-conventional fishery resources is the pufferfish which is exploited along the Karnataka coast, south-eastern Arabian Sea. A decrease in mean trophic level due to the increased fishing effort or climatic variability resulted in the removal of top-level predators leading to the rise of mid-level carnivores like Lagocephalus inermis in the Arabian Sea. A substantial increase has been noticed in the landing of pufferfish in trawl along with Karnataka since 2007 and has resulted in diversification of the employment in the fisheries sector. The pufferfish brought to the shore by trawlers are degutted, de-skinned, and cut into small pieces, and packed for transportation to other parts of the country. This sector has provided employment to about fifty women in each landing center, and each of them earns INR 200-300/day. The matured eggs collected from the fish are sold at a price of INR 10/kg. In addition, the trade of salted and dried fishes generated employment to an additional 50 women in the sector. This diversification has given more employment opportunities, especially to women. The study conducted revealed an increase of 1.5 fold from landing to the final product. Diversification of the livelihood to cope up with the changes in the fishery is an adaptation measure to combat species shift associated with climate change and climatic variability.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_189058.html}, eprint = {https://ejabf.journals.ekb.eg/article_189058_b110bf8b333caf9ece0b28f3841d7ec8.pdf} } @article { author = {M. Mohamed et al., Rehab}, title = {Green biosynthesis, structural characterization and anticancer activity of copper oxide nanoparticles from the brown alga Cystoseira myrica}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {341-358}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.189069}, abstract = {Copper oxide nanoparticles (CuONPs) were synthesized by a green method using an aqueous extract of Cystoseira myrica as a capping and reducing agent. A UV-visible spectrophotometer was used to characterize the produced nanoparticles. The aqueous extract of C. myrica at pH 5 and 100°C after 150 minutes was shown to be the optimal condition for the synthesis of copper oxide nanoparticles. The Structure and characters of synthesized nanoparticles were confirmed using TEM, DLS, XRD, and FTIR. The efficiency of different concentrations of copper oxide nanoparticles (25, 50, 75, 100) µg/ml synthesized from aqueous extract of C. myrica exhibit high antitumor activity against some cancer lines such as HepG2 and MCF-7. The percent of cell viability decreases as the concentration of nanoparticles rises. Copper oxide nanoparticles at a concentration of 100 µg/ml were found to have the lowest percentage of cell viability in HepG2 (18.7%), while MCF-7 was (19.27%).}, keywords = {Metal oxide nanoparticles,CuONPS,Cystoseira myrica,pH,HePG2,MCF-7}, url = {https://ejabf.journals.ekb.eg/article_189069.html}, eprint = {https://ejabf.journals.ekb.eg/article_189069_7ff2ec26545d2871f90549a1d03be17e.pdf} } @article { author = {Z. Y. Aly et al., Mohammed}, title = {Recent, Eco-friendly Approach for Controlling Culex pipiens (L.) using Novel Synthesized Cadmium Sulphide Nanoparticles of Ocimum basillicum Extract}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {359-377}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.189664}, abstract = {Mosquitoes are the key vector for the transmission of serious parasites and pathogens which affect many people worldwide. The massive overuse of synthetic mosquito insecticides had developed resistance in mosquitoes. Therefore, the need for reliable and eco-friendly control techniques became crucial. Nanoparticle fabrication is a cutting-edge and trending method. The green production of cadmium sulphide nanoparticles (CdS NPs) utilizing Ocimum basillicum leaves as a sophisticated and effective strategy against Culex pipiens was demonstrated in this study. CdS nanoparticles are characterized by a series of techniques including UV-Vis spectrophotometry, High-Resolution Transmission Electron Microscope (HRTEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). CdS nanoparticles (CdS NPs) were highly effective against the larvae (3rd instars) of Culex pipiens after 24 hours of treatment. The LC50 of CdS NPs was 0.0113 g/l. Meanwhile, the LC50 of Ocimum basillicum aqueous extract of leaves was 52.36 g/l. There was no mortality in the control group. CdS NPs also increased larval and pupal duration significantly. Furthermore, it had a deleterious impact on pupation and adult emergence rates. Post-treatment imaging using a light microscope and scanning electron microscopy (SEM) results in larvae had deformities and constrictions in the head and thorax area. The abdomen (digestive tract and respiratory canal) was completely deformed, however, the syphon remained unaffected with typical spiracular valves and very minor abnormalities on the tracheal trunk surface and muscle fibre. Conclusion: Overall, this study suggested that the use of Ocimum basillicum leaves extract mediated synthesis of CdS nanoparticles can be used for controlling Culex pipiens. This is the first study to look at the larvicidal potential of CdS NPs synthesized by Ocimum basillicum leaves extract against Culex pipiens and the potential impacts.}, keywords = {mosquito control,CdS nanoparticles,Ocimum basillicum,larvicidal activity,biological parameters,SEM Analysis,Culex pipiens}, url = {https://ejabf.journals.ekb.eg/article_189664.html}, eprint = {https://ejabf.journals.ekb.eg/article_189664_590a99424d323f62217d44e31ff6a19b.pdf} } @article { author = {Rasul et al., Md. Golam}, title = {Chemical Composition and Nutritional Value of Dried Fish in Bangladesh}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {379-399}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.189666}, abstract = {Nowadays, people are very conscious about health and nutritional issues and they concern about the nutritional value of the dried fish when they buy these foods for their household consumption. The review article mainly focused on the chemical composition of dried fishes of Bangladesh including protein and amino acid, fats and fatty acid profile, and minerals along with their health benefits. Dried fish is a specially processed fishery product along with high nutritional value and health benefits due to important nutritional components. The principal components of dried fish are high-quality protein and amino acids. It also contains lipids, polyunsaturated fatty acids, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA); richer mainly in marine dried fish. Small dried fishes contain more mineral contents such, as calcium, iron, potassium, sodium, phosphorus, zinc, etc. compared to the larger ones. Therefore, the consumption of dried seafood has beneficial effects on human health. It helps in forming body tissues, antibodies, and enzymes, repairing worn-out tissues, with the decreased risk of coronary heart and cardiovascular diseases. In addition, it cures inflammatory diseases such as arthritis and prevents cancer, reduces lower insulin resistance, triglyceride, and obesity, and improves hyperglycemia, etc. While undernutrition is still negatively affecting the health and well-being of many people. Based on proximate composition, amino acids, fatty acids profile, and minerals, it can be concluded that dried fish can be a good source of health beneficial nutrients for humans.  }, keywords = {Dried fish,protein,Lipid,Mineral,Health Benefits}, url = {https://ejabf.journals.ekb.eg/article_189666.html}, eprint = {https://ejabf.journals.ekb.eg/article_189666_4dc747c3b891bc31975b522e1e276899.pdf} } @article { author = {M. Osman et al., Hanan}, title = {Reproductive biology of the Lessepsian migrant shrimp scad Alepes djedaba (Forsskal, 1775) from the Egyptian Mediterranean Sea coast.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {401-415}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.189953}, abstract = {The shrimp sacd, Alepes djedaba is a dominant species of genus Alepes in the purse seine catch of Damietta and Port Said landing sites on the Egyptian Mediterranean Sea. It represents a commercial species in Mediterranean Sea fisheries. A total of 718 specimens were collected from January to December 2019. The sex ratio M: F was 1.0:1.24 as the total sample contained 321 males and 397 females. The P-value of the chi-square test showed a highly significant difference between both sexes. Macroscopic and histological examination of gonads and monthly gonado-somatic index distribution revealed that A. djedaba has a prolonged spawning season extending from April to November with a peak during May. The lengths at first maturity were 16.0 and 16.7 cm for males and females respectively. A. djedaba is distinguished by high fecundity as the absolute fecundity ranged from 31680 to 336675 with an average of 134940.6 eggs and the relative fecundity ranged from 980.8 to 2683.9 with an average of 2152.2 oocytes g-1}, keywords = {Shrimp scad,A. djedaba,Reproductive biology. Mediterranean Sea fishery}, url = {https://ejabf.journals.ekb.eg/article_189953.html}, eprint = {https://ejabf.journals.ekb.eg/article_189953_5d67a596e80326cb38895d89dd2ed0ff.pdf} } @article { author = {I. Elkhateeb et al., Mohammed}, title = {Evaluation of bioactive phytochemical characterization, antioxidant, antimicrobial, and antihemolytic properties of some seaweeds collected from Red Sea coast, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {417-436}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.190299}, abstract = {This study aimed to evaluate total phenolics (TPC) and flavonoid (TFC) contents, antioxidant, antihemolytic, and antimicrobial properties of different seaweed ethanolic crude extracts that were collected from the Red Sea coast, Egypt. These extracts were obtained from ten different species of seaweeds including Padina boergesnii, Sargassum subrepandum M Alam, Sargassum subrepandum Hur, Sargassum aquifolium, Sargassum cinerum M Alam, and Sargassum cinerum Mangroove fromPheaophytae, Codium tomentosum, Dictyota dichotoma, and Halimeda opunta from Chlorophytae, and Laurancia papilosa from Rhodophytae. Furthermore, The ethanolic extracts were analyzed for total phenolic (TPC) and total flavonoid content (TFC),  the antioxidant activities including; 1,1-diphenyl-2-picryl-hydrazil (DPPH), Nitric Oxide (NO), and Hydrogen Peroxide (H2O2) scavenging activities. In addition, the antihemolytic and antimicrobial activities were estimated and the phenolic compounds (phenolic acids and flavonoids) were evaluated by HPLC. Among the ten species, extract of  C. ‎tomentosum and S. aquifolium has recorded the highest value of ‎TPC (18.83±1.62 and 18.51±2.22 mg equivalent/g dry extract, ‎respectively) and the TFC was 3.77±0.41 and 3.45±0.41 mg equivalent/g ‎dry extract, respectively. Also, the two species showed significantly ‎greater radical scavenging ability in DPPH radicals (IC50 5.41 and 5.51 ‎mg/ml,  respectively), NO (IC50 5.31 and 8.24 mg/ml,  respectively) and H2O2 (IC50 0.425 and 0.332 ‎mg/ml,  respectively).‎ Interestingly, the crude extract of C. tomentosum ‎and S. aquifolium‏ ‏showed the lowest hemolytic activities however, they showed strong antimicrobial activity. Conclusively, this study highlights the interesting candidates for the pharmaceutical and medicinal applications owing to their antioxidant and antimicrobial activities, which may lay the foundation for developing a new therapeutic intervention from seaweeds.}, keywords = {seaweed,algae,antioxidant,Antimicrobial,Antihemolytic,Phytochemical}, url = {https://ejabf.journals.ekb.eg/article_190299.html}, eprint = {https://ejabf.journals.ekb.eg/article_190299_f9d92775ed5f0a53f0177bb48715fd4a.pdf} } @article { author = {Y. El-Dakar et al., Ashraf}, title = {Using clove and mint oils as natural sedatives to increase the transport quality of the Nile tilapia (Oreochromis niloticus) broodstock}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {437-446}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.190302}, abstract = {The present study was conducted to create a new strategy for increasing the transport efficiency of brood-stock Nile tilapia (Oreochromis niloticus) using clove and mint oils for 3.5 h. The fish study was exposed to conditions simulating those normally used in transporting. This study was performed in a fish research center of the Arish University. The average initial weight of the broodstock was 117.07 ± 09.07g (± standard error). The broodstock was randomly distributed into 10 clear plastic aquaria (30 liters capacity) with a stocking density of one brood-stock/3.75 liter of water. The present study examined two concentrations of clove oil as a deep anesthetic for 5 min and two concentrations of mint oil as a sedative. It included five treatments in duplicate, namely, the control group, G1: clove and mint oil at 100 and 20 µL/L, respectively; G2: 100 and 10 µL/L of clove and mint oil, respectively; G3: 50 and 20 µL/L of clove and mint oil, respectively; and G4: 50 and 10 µL/L of clove and mint oil, respectively. Blood samples were taken from all groups before transporting from a random sample and after transport. Results confirmed that G1 had the best parameters of water quality and blood indicators with the highest survival rate followed by G2. Moreover, using clove and mint oil improved the transport efficiency and survival rate after 24 h of fish transporting compared to that of the control group.}, keywords = {Nile tilapia,anesthetics,Sedatives,Clove oil,Mint oil}, url = {https://ejabf.journals.ekb.eg/article_190302.html}, eprint = {https://ejabf.journals.ekb.eg/article_190302_4fc7568c8bdb1bbf9172b3e0e977ac29.pdf} } @article { author = {H. Abdel-Kader, Heba and H. Mourad, Mohamed}, title = {Estimation of tilapia fish quality in Lake Edku through physiological analyses regarding trace element accumulation, antioxidant enzymes, proximate composition, and human health risk assessment as the ultimate consumer}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {447-463}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.190346}, abstract = {Lake Edku is one of the most important northern lakes whose people with limited income depend on its fish as a cheap source of food. In 2016, the Egyptian government has developed a strategy to develop the historical and economic value of northern lakes included Edku Lake within the Egypt vision 2030. That is why this study was conducted to monitor the physiological state of tilapia fish caught by different fishermen around the Edku lagoon. The results reported that the highest concentration was for As in O. aureus (2.16±0.3μg/g), which increased the safe limits permitted by FAO/WHO, EU' and the EOSQC. S. galilaeus was recorded the lowest Hg level (0.35±0.1 μg/g). The results estimated that the highest mean carbohydrate (13.85±1.26), fats (22.26±1.32), and water content (77.66±0.62%) were found in O. aureus. Otherwise, the largest ash (10.66 ± 1.72%) and protein (65.16±1.27) concentrations were recorded in S. galilaeus. The current study showed that S. galilaeus had the highest activity of antioxidant enzymes in the liver. The present study suggested that the children should intake less than 18.51g/day or 129.62g/week O. niloticus muscle, 13.761g/day or 96.33 g/week O. aureus muscle, and 16.66g/day or 116.66 g/week S. galilaeus muscle. Youth, on the other hand, should consume no more than 49.38g/day or 345.67g/week O. niloticus muscle, 36.69g/day or 256.88g/week O. aureus muscles, and 44.44g/day or 311.11g/week S. galilaeus muscle. Finally, adults should intake fewer than 84.65g of O. niloticus muscle per day or 592.59g per week, 62.90g of O. aureus muscle per day or 440.36g per week, and 47.61g of S. galilaeus muscle per day or 333.33g per week.  }, keywords = {Edku Lake,Tilapia sp,Trace elements Proximate composition,Antioxidants enzyme Human risk assessments}, url = {https://ejabf.journals.ekb.eg/article_190346.html}, eprint = {https://ejabf.journals.ekb.eg/article_190346_e7509c0a6f71ef4fb8350c10790ea851.pdf} } @article { author = {F. Sadek, Mohamed and S. Nabawi, Shimaa}, title = {Effect of water salinity on growth performance, survival %, feed utilization and body chemical composition of the Pacific white shrimp, Litopenaeus vannamei juveniles}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {465-478}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.190788}, abstract = {The current study was carried out to investigate the effect of water salinity (5, 15, 25, and 35‰) on growth performance, survival, feed utilization, and body chemical composition of the Pacific white shrimp, Litopenaeus vannamei, juvenile in the water environment of Qaroun Lake. Juveniles of L. vannamei with initial body weight (2.77 ±0.12g) were acclimated to laboratory conditions for 14days before being randomly distributed into in eight circular fiberglass tanks with a volume of 1.5m3 for 80-days at a stocking density of 40 juveniles/tank. All tanks were provided with continuous aeration. Results revealed that survival (%) was within the range of 90–98.75%, recording insignificant differences. Results of growth performance parameters were the highest with shrimp reared in water salinity (5‰) compared to the other salinity percentages. The best FCR (lowest values) was recorded with shrimp reared in water salinity of 5‰. While shrimp reared in water salinity (35‰) showed the worst FCR. The lowest body protein content was recorded with shrimp reared in water salinity of both 5 and 15 ‰. The opposite trend was recorded for body ether extract. Based on the obtained results, the optimum growth rate of L. vannamei was obtained when reared in water salinity of 5‰ under experimental conditions which makes it suitable for cultivation in the water environment of Lake Qarun.}, keywords = {Pacific white shrimp,water salinity,Growth performance,feed utilization,Body chemical composition}, url = {https://ejabf.journals.ekb.eg/article_190788.html}, eprint = {https://ejabf.journals.ekb.eg/article_190788_0c44e7f704423a67cf2fd9b19754cc64.pdf} } @article { author = {Ahammad et al., A.K. Shakur}, title = {Characterization of Best Growing Line of the Minnow, Gymnostomus ariza (Hamilton 1807) through Landmark-based Morphometric Analyses}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {479-498}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.191022}, abstract = { A great decline has been witnessed in the minnow, Gymnostomus ariza (Hamilton, 1807) in the natural water bodies; a phenomenon that requires high consideration. Hence, the present research has been organized to focus on the quality feed production of this fish. Specimens of G. ariza from three distinct rivers (the Kangsha, the Atrai and the Jamuna Rivers in Bangladesh) were collected and subjected to form six breeding lines with15 species in each line. The progeny from these lines has been inspected phenotypically to assess the structure and shape variation of the population based on landmark and morphometric and meristic characters. After checking normality, One-way ANOVA disclosed that all morphometric, meristic and truss system measurements were dissimilar among the six lines, while line-4 exhibited significantly higher growth in all aspects. For the morphometric and truss measurements, the discriminant functions graph revealed a well-detached group of six lines indicating that the values differed significantly among the lines. The dendrogram constructed by means of morphometric and landmark data displayed one leading cluster of line-4 connected with all other lines combined. Considering the best growing line identified in the current research, the outcomes would be beneficial to promote the culture of this species, maintain proper conservation, attain successful management, and in addition, support further research with informative data.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_191022.html}, eprint = {https://ejabf.journals.ekb.eg/article_191022_64500f0bb709880cc32d2177b1cbbb30.pdf} } @article { author = {Ahmet Doğdu, Servet and Turan, Cemal}, title = {Genetic and morphological impact of the cultured gilthead sea bream (Sparus aurata Linnaeus, 1758) populations on wild stocks}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {499-511}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.191035}, abstract = {Sparus aurata is a very important fish, in fisheries and aquaculture. In this study, the genetic impact of cultured gilthead sea bream S. aurata was examined on wild stocks in the Iskenderun Bay (Northeastern Mediterranean) by genetic and morphological analyzes. Morphometric traits of gilthead sea bream were investigated using a traditional set of measurements and network system. In total, 91 morphometric characters were measured for the Biomorph v3 of measurements and 14 for the truss network system. Results of discriminant function analysis (DF), three functions were produced, and the first two discriminant functions (DFs) explained 90.1% of between-group variability and plotting DF1 (55.2%) and DF2 (34.8%). Mitochondrial DNA sequencing of 16S rRNA region was found to be 830 base pair and 21 bp variable and 3 bp parsimony informative sites between populations. The nucleotide composition was found to be 21.1%, 24.1%, 32.9% and 21.1% for T, C, A and G, respectively. The average value of genetic diversity and genetic distance within populations was found to be 0.00316 and -0.00088, respectively. Haplotype diversity of the cultured population was found to be 0.6710 while the wild population was found to be 0.8333. In the present study, the morphological and molecular analysis identified cultured fish escapees in the wild data set sampled in the aquaculture sites. Despite a mixed gene pool in the wild population, as a result of a long-term culture period of fish originating from Mediterranean broodstocks, the molecular genetics tools identified potential cultured escapees.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_191035.html}, eprint = {https://ejabf.journals.ekb.eg/article_191035_339749798f41e2327f8c1a92ca0945fb.pdf} } @article { author = {Hanafy et al., Said}, title = {Spatial, seasonal distribution and ecological risk assessment of Zn, Cr, and Ni in Red Sea surface sediments, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {513-538}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.191624}, abstract = {Recently, the marine ecology in the Red Sea coast has been altered due to various anthropogenic activities that led to an accumulation of heavy metals (HMs) in its sediments. To evaluate the spatial and temporal distribution and the ecological risk assessment along the study area of the Egyptian Red Sea coast, fourteen samples of sediments were collected during spring and autumn in 2015. The present study aimed to address chromium, zinc, nickel, total carbonate, and organic matter in the sampled sediments to assess the risk. In both seasons, the descending order of metal concentrations was Zn > Cr > Ni. The level of studied metals was compared to the background and sediment quality guideline (SQG) values. Results revealed that an adverse biological effect in some sites was possible. Zinc, for instance, recorded higher averages than those of the background and those detected along worldwide coasts. Additionally, to evaluate pollution, methodologies such as the enrichment factor (EF), contamination factor (CF), pollution index (PI) and modified pollution index (MPI) were calculated and interpreted. }, keywords = {Red Sea,Coastal sediments,Assessment of Sediment Contamination,Heavy metals}, url = {https://ejabf.journals.ekb.eg/article_191624.html}, eprint = {https://ejabf.journals.ekb.eg/article_191624_436c0dbb31ff339c63dc7a97f2fb80a9.pdf} } @article { author = {Barylo et al., Yevheniia}, title = {Condition factor and identification of amino acid composition of three trout species in the western region of Ukraine}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {539-548}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.191625}, abstract = {Indicators of the condition factor, growth rate, and quality of the final products of cultivated objects are important parameters for the effective management of cold-water fish farming. These indicators are also used as a way to control the impact of environmental factors on fish, which requires constant research in the context of intensification of the aquaculture sector. The research is aimed at determining the condition factor and the amino acid composition of muscle tissues of  Salmo trutta fario (Linnaeus, 1758),  Oncorhynchus mykiss (Walbaum, 1792), and  Salvelinus fontinalis (Mitchill, 1814) under the conditions of the western region of Ukraine. The results of the condition factor showed that S. fontinalis had the highest value with 1.52±0.0340, and O. mykiss and S. trutta showed the lowest value with 1.33±0.0361 and 1.26±0.0181, respectively. Food conversion ratios were similar for S. fontinalis and O. mykiss (1.0), whereas S. trutta showed higher values (1.4). The specific growth rate was highest in rainbow trout. The specific growth rate was higher for rainbow trout (1.4) compared to the brook trout (1.32) and brown trout (1.28). The maximum content of protein, total amino acids (TAA), total essential amino acids (TEAA) and nonessential amino acids (TNEAA) we registered in brook trout. The muscle tissue of the investigated fish species is a well-balanced source of the nutrition energy in terms of the ratio of total essential to total nonessential amino acids (TEAA:TNEAA ratio).}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_191625.html}, eprint = {https://ejabf.journals.ekb.eg/article_191625_3ca10d2878c00bbc08ad1f4f021923de.pdf} } @article { author = {Rahman Sunny et al., Atiqur}, title = {Livelihoods and Vulnerabilities of Small-Scale Fishers to the Impacts of Climate Variability and Change: Insights from the Coastal Areas of Bangladesh}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {549-571}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.191652}, abstract = {This study identifies the livelihood characteristics of small-scale fishers and how their livelihoods become affected through climate change-induced events, based on fieldwork in four fishing communities in lower Padma hilsa (Tenualosa ilisha) sanctuaries. To collect empirical data, several qualitative tools were employed, such as individual interviews, focus group discussions, oral history, and key informant interviews. A conceptual framework named Sustainable Livelihood Approaches (SLA) was used to analyze the data. The insights of the livelihood and climate vulnerability of small-scale fishers and fisheries management were addressed. The factors related to climate change included fluctuation of temperature and rainfall, frequent natural calamities, tidal inundation and outbreak of diseases. In addition, river pollution, alteration of migratory routes, poverty, malnutrition, debt cycle, social tension, stakeholder conflicts and lack of alternative earning flexibility made them more vulnerable. The current findings,  derived from fishers' perceptions, are crucial for sanctuary's co-management, biodiversity conservation, planning and development of livelihoods of the small-scale fishers.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_191652.html}, eprint = {https://ejabf.journals.ekb.eg/article_191652_0aeb494ead36f8e1226a294d6d768809.pdf} } @article { author = {A. O. El- Aiatt et al., Attia}, title = {Length-Weight Relationship and Condition Factor of white grouper Epinephelus aeneus ( Geoffroy Saint Hilaire, 1817) in the Mediterranean coast of Sinai, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {573-586}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.191720}, abstract = {This study describes the first documented length-weight relationship and condition factor of the white grouper Epinephelus aeneusin on the Mediterranean coast of Sinai, Egypt. A total of 697 specimens with an average length of 34.6 cm and weight 593.0 g were monthly sampled from January 2019 to December 2020. For each specimen, length (cm) and weight (g) were measured. The length-weight relationship was described by the equation: W = a Lb, while the condition factor was calculated using the equation: K = 100 (W/ L3). Condition factor was calculated monthly and according to the length group. The values of the regression coefficients obtained for the length-weight relationship were 2.9327, 2.8847 and 3.1141 having r² values of 0.9392, 0.9438 and 0.9616 for males, females and combined sexes of the studied species, respectively. Condition factor (K) of males, females and combined sexes of E. aeneus was fluctuated monthly and related to lengths groups. It was concluded that general well-being was observed for this species, since condition factor more than 1 (K= 1.20, 1.30 and 1.20 for males; females and combined sexes, respectively). The current study's findings can be used as baseline data for this species in the examined area.}, keywords = {Length weight relationship,Condition factor,Epinephelus Aeneus,Mediterranean coast}, url = {https://ejabf.journals.ekb.eg/article_191720.html}, eprint = {https://ejabf.journals.ekb.eg/article_191720_d899eb0bdcf30f9da5aba1d6d5b90d46.pdf} } @article { author = {S. M. Osman et al., Khaled}, title = {Long-Term Toxic Effect of Inhaling Smokes of Cigarette and Incense on different stages of Culex pipiens}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {587-601}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.192264}, abstract = {The toxic effects of inhaling cigarette and industrial incense smoke on the different stages of the aquatic insect Culex pipiens (L.) for two generations had been investigated. Eggs, larvae, pupae, and adult stages were exposed to the smoke daily for 82 days. The results showed that in the 1st generation, cigarette smoke affected the mortality rate of larvae (29.80 %) and adults (57.95 %), while industrial incense smoke recorded a loss rate on the larvae (47.56 %) and to the adults (32.61 %). In the 2nd generation, the highest loss rate was recorded for adult mortality (75.68 %) from cigarette smoke. Larval and adult mortality was affected by industrial incense smoke by 86.67 % and 54.55 %, respectively. Moreover, egg production of the 1st to 2nd generations was affected negatively by cigarettes (88.06 %) and positively by industrial incense (36.99 %). X-ray fluorescence spectrometer analysis showed incense had a major amount of calcium (78.24 %) followed by ferrous (10.04 %) and potassium (6.12 %). The cigarette had calcium and potassium as major components represent (60.86%) and (31.39%), respectively. Using the GC-MS technique, toxic material of crude material of cigarette and incense was found that cigarette had 60 chemicals and industrial incense had 33 chemicals. Glycerol, 3TMS derivative, and dimethyl phthalate recorded the most dominant chemicals in cigarettes by 19.64% and 16.75%, respectively. Dimethyl phthalate was the most dominant chemical (75.68%) in industrial incense. Most cigarette components were recorded as toxic materials while those in the incense had a low toxicity.  }, keywords = {toxicity,Mosquitoes,Culex pipiens,Cigarette,mortality,GC-MS}, url = {https://ejabf.journals.ekb.eg/article_192264.html}, eprint = {https://ejabf.journals.ekb.eg/article_192264_a65971440cc5dbc7e143463e8722ced7.pdf} } @article { author = {A. A. Osman et al., Yassein}, title = {Patterns of variations in populations of Parupeneus forsskali (Fourmanoir and Guézé, 1976) of the Red Sea, Gulf of Suez, and the Mediterranean Sea as reflected by otolith shape using ShapeR}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {603-614}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.192459}, abstract = {Population structure and differentiation of Parupeneus forsskali(Fourmanoir & Guézé, 1976) was studied by otolith shape variation using the ShapeR package. The quantitative shape analysis was used for studying otolith shapes. The outlines were analyzed with univariate and multivariate methods of Wavelet and Fourier transformations. There were significant differences (P<0.05, ANOVA) between geographically distant populations of P. forsskali collected from the Red Sea, Gulf of Suez and the Mediterranean Sea. The differences between populations were 85 % for the first discrimination. Additionally, the classification success with cross-validation for the three populations was 65%. The misclassification error for the linear discrimination analysis was 0.353. The observed morphological differences were supposed to reflect environmental effects or might be attributed to differences in life-history strategies. Studying Population structure and differentiation is important for designing appropriate regulations for effective fisheries management.}, keywords = {Otoliths,shaper,Parupeneus,Red Sea,Gulf of Suez,Mediterranean Sea}, url = {https://ejabf.journals.ekb.eg/article_192459.html}, eprint = {https://ejabf.journals.ekb.eg/article_192459_a076f7acf997735890214c2825633984.pdf} } @article { author = {Mohammed-Geba et al., Khaled}, title = {DNA Barcoding and Molecular Phylogeny Confirm the Presence of the Cryptic Penaeus japonicus Form II (P. pulchricaudatus) in the Egyptian Demersal Fisheries of the Gulf of Suez and the Bitter Lakes.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {615-627}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.192469}, abstract = {The Kuruma prawn Penaeus japonicus is one of the world's most well-known prawn species. It contributes a major benefit for the Egyptian fisheries-based economy. In the previous two decades of the 21st century, P. japonicus has been proven to be a species complex, encompassing mainly two forms, termed P. japonicus (Form I) and P. pulchricaudatus (Form II). In order to accurately identify the exact form of P. japonicus that exists in the Gulf of Suez and the Bitter Lakes, samples were obtained by trawling from the Gulf of Suez and artisanal fishing from the Bitter Lakes. They were subjected to the mitochondrial 16S rDNA-based DNA barcoding. The obtained sequences were analyzed for identifying the exact form using GenBank database comparisons, phylogenetic analyses, and genetic pairwise distances-based comparisons. The results exhibited that all the collected samples belonged to two different haplotypes, both belonging to the Form II of Kuruma prawn, i.e. P. pulchricaudatus. Genetic pairwise distances and phylogenetic analyses also agreed with the pertinence of all collected Gulf of Suez and Bitter Lakes Kuruma shrimp samples to P. pulchricaudatus. Therefore, the results of the current study strongly recommend applying conservation and management strategies for this species in the Gulf of Suez and Bitter as the Form II, i.e. P. pulchricaudatus, which was proven to be genomically and transcriptomically different from the proper P. japonicus, i.e. Form I.}, keywords = {Cryptic species,DNA barcoding,Penaeus pulchricaudatus,Penaeus japonicus,Phylogeny}, url = {https://ejabf.journals.ekb.eg/article_192469.html}, eprint = {https://ejabf.journals.ekb.eg/article_192469_2b1bf98216ba64d1d71a34e673913a8b.pdf} } @article { author = {Sugiharto, Rudy and Tjahjono, Agus}, title = {The Relationship between Plankton Abundance and Abiotic Parameters in the Downstream Section of the Musi River, Palembang}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {628-642}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.192470}, abstract = {The Musi River, the largest river in Palembang in South Sumatera, has become one of its important sites, in which various activities such as shipping and irrigation are performed. Those activities are assumed to eventually affect the fertility of the waters. This research was conducted to accomplish three targets. The first was to analyze the abundance, diversity index (H'), uniformity (E), and the dominance of phytoplankton and zooplankton. The second target was to examine the difference in abundance of phytoplankton and zooplankton in the stations using ANOVA. The third was to analyze the relationship between the abundance of phytoplankton and zooplankton using PCA (Principal Component Analysis). Results revealed that the phytoplankton found downstream of the Musi River consisted of four classes. Bacillariophyceae, for instance, dominated the waters with a rate of 51.35%, followed by Chlorophyceae with a rate of 33.58% and the other two classes. The zooplankton consisted of twelve classes whose dominant class was Cilliate reaching 36.56% and followed by Mastigophora of 14.7%. It was also discovered that the diversity index (H') of plankton was moderate. Results indicate that the water condition was somewhere in between moderately and heavily polluted. The uniformity index (E) was high while the level of dominance (D) indicates that there was no dominant genus in the waters. Moreover, based on ANOVA, the abundance of plankton in the stations showed no significant differences. In addition, the abundance of zooplankton was influenced by four factors whose largest contribution was nitrite, TSS, and fosfat reaching 37.2%.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_192470.html}, eprint = {https://ejabf.journals.ekb.eg/article_192470_4849899a5b90989693ef7601fa85c0b4.pdf} } @article { author = {Sonowal et al., Jyotirmoy}, title = {Sagittal otolith morphology and biometric relationships of three snakehead species from the upper Brahmaputra Basin, India}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {643-654}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.193356}, abstract = {Morphometrics of sagittal otolith of three snakeheads species; Channa punctata (Bloch, 1793), Channa gachua (Hamilton, 1822) and Channa striata (Bloch, 1793) from the upper Brahmaputra Basin, India were investigated. The study revealed variations in otolith sizes and shapes among the three species. The largest sagittal otolith was observed in C. striata followed by C. punctata and C. gachua. Evaluation of relationships of total length and fish weight with sagittal length, width and mass indicated that all the three species are inclined towards a particular otolith morphometric character. The findings of the present study provide novel morphological as well as biometric data for predicting the length and weight of the fishes which may serve as an important identification tool for the fishes along with the associated morphometric characters.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_193356.html}, eprint = {https://ejabf.journals.ekb.eg/article_193356_e848bb72991595a6e41d8196fba4946b.pdf} } @article { author = {S. Ahmed et al., Ayman}, title = {Fisheries status of Octopus (Cephalopoda: Octopodidae) in the Gulf of Suez, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {655-668}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.193748}, abstract = {During the last years, the price of Octopuses in the national and international markets increased spectacularly. Due to the high demand and the attractive selling price of Octopus,  most fishermen increased the fishing efforts exerted on Octopus. This study throws light on the fisheries status and species composition of Octopuses in the Gulf of Suez. A number of 2759 individuals ​were collected by trawling vessels from September 2017 to April 2018, and the fishing effort was represented by the number of landings. The present results showed that the trawling fishing effort fluctuated greatly from one season to another between a minimum value of 1118 landings during the fishing season 2012/2013 and a maximum value of 1852 landings during 2019/2020 with an average value of 1592 landings throughout the last eight years. The species composition of Octopus caught from the Gulf of Suez comprised four species; Amphioctopus aegina, Amphioctopus membranaceus, Octopus cyanea and Macrotritopus defilippi. A. aegina and A. membranaceus were by far the most abundant among Octopus catch in the Gulf of Suez, constituting more than 91% of the catch. This information would help in the Gulf of Suez management purpose to maintain the stock of this valuable resource.}, keywords = {Amphioctopus aegina,A. membranaceus,Octopus cyanea,Macrotritopus defilippi,species composition,Gulf of Suez}, url = {https://ejabf.journals.ekb.eg/article_193748.html}, eprint = {https://ejabf.journals.ekb.eg/article_193748_67211d7c9e956b275bde74dbe405ecce.pdf} } @article { author = {W. Soliman et al., Asmaa}, title = {Molecular detection of the most common bacterial pathogens affecting economically important Egyptian Red Sea fishes}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {669-688}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.193867}, abstract = {The current study aimed to investigate the most common pathogenic bacteria that are naturally infecting wild marine fishes collected at different localities along the coastline zone of Hurghada City, Egypt. A total of 300 samples of marbled spine foot Siganus rivulatus and the Haffara Seabream Rhabdosargus haffara were subjected to clinical and bacteriological examinations. The examined fishes showed the characteristic clinical signs and postmortem lesions of vibriosis and photobacteriosis. Based on the morpho-chemical characterization, bacterial isolates retrieved from the naturally infected fishes were identified as Vibrio spp. and Photobacterium spp. Through sequencing 16S rRNA genes, the identities of bacterial isolates were confirmed as V. alginolyticus, V. vulnificus, P. damselae subsp. damselae and P. damselae subsp < em> piscicida. Vibrio alginolyticus was the most frequent isolated bacterial pathogen and represented 54.4% and 46.7% of the total isolates recovered from S. rivulatus and R. haffara, respectively. Thus, the current study confirmed that Vibrio and Photobacterium species remain the most prevalent bacterial pathogens infecting Egyptian Red Sea fishes.  From food safety perspective, these types of infections could pose potential public health hazards.}, keywords = {Vibrio alginolyticus,V. vulnificus,Photobacterium Damselae,Red Sea fishes,Sequencing,Phylogenetic analysis}, url = {https://ejabf.journals.ekb.eg/article_193867.html}, eprint = {https://ejabf.journals.ekb.eg/article_193867_bb4ba120378b42bdf91b29013a9078dd.pdf} } @article { author = {Fitrial, Yuspihana and Khusnul Khotimah, Iin}, title = {The Antibacterial Activity of Melanin in the Cuttlefish (Sepia sp.) Ink against Aeromonas sp.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {689-704}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.193982}, abstract = {The marine environment consists of many organisms recognized to have bioactive compounds as a mechanism of self-defense or protection of eggs and embryos. One of them is cuttlefish (Sepia sp.). This study aimed to determine the potential and bactericidal action of the cuttlefish ink melanin against Aeromonas sp. Ink extraction and purification were carried out to obtain melanin mechanically using 0.5M HCl. The growth patterns of bacteria were studied by the Total Plate Count method, and the bactericidal mechanism of melanin was observed by Transmission Electron Microscopy (TEM). The results showed that cuttlefish ink melanin inhibited Aeromonas sp. as indicated by the shrinkage of cell size and irregular cell shape. The results of this study are important information for dealing with Aeromonas sp. attack in cultured fish.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_193982.html}, eprint = {https://ejabf.journals.ekb.eg/article_193982_73f8bef92a2879d7c05910a3dcf32b58.pdf} } @article { author = {M. A. Khattab et al., Noura}, title = {Genotoxicity and limbs asymmetry in the Egyptian toad (Sclerophrys regularis) as biomarkers for heavy metals toxicity}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {705-717}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.194098}, abstract = {   Many species of amphibians are facing remarkable decline and extinction throughout the world. Chemical contamination, such as heavy metals, is one of the factors contributing to the extinction of amphibians. Wetland biota, particularly amphibians, may be harmed by heavy metal contamination. The emergence of micronucleated erythrocytes (MN) and nuclear lesions (NL), collectively known as MN-Test, in nucleated erythrocytes is an excellent tool for detecting genotoxicity or chromosomal damage. Furthermore, developmental instability, also known as fluctuating asymmetry (FA), is broadly applied to assess changes in the health of the environment under natural conditions when it is subjected to long-range pollution. Some heavy metals (MN, Fe, Pb, Cd, and Cr) were measured in water – soil from two separate environments of  Egyptian toad “Sclerophrys regularis” (EL Giza and El Wahat regions, Egypt). MN and FA traits were also assessed to compare and evaluate the impact of heavy metals pollution. The current results have revealed that EL Giza is more polluted than EL Wahat, and toads inhabiting EL Giza showed higher micronucleated MN and NL of RBCs than that from EL Wahat. Two patterns of fluctuating asymmetry;  the right hindlimb was larger than the left limb and the right forelimb was larger than the left forelimb, were recorded from EL Giza. On the other hand, opposite results were obtained for toads processed from El Wahat. Statistical analysis indicated the presence of strong relation between heavy metals distribution in the environment and the investigated biomarkers (0.05≥ P≤ 0.01).}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_194098.html}, eprint = {https://ejabf.journals.ekb.eg/article_194098_1c729d80a8cab950d2c09f01b18ab625.pdf} } @article { author = {El-lamie et al., Maather}, title = {Concurrent natural infection of Acanthocephalan species and Euclinostomum heterostomum synergistically increase Motile Aeromonas septicemia and Vibriosis in the Nile tilapia (Oreochomis niloticus)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {719-739}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.194394}, abstract = {A seasonal study was performed on the wild Oreochomis niloticus collected seasonally from Suez channel, branched of the River Nile in Fayed region, Ismailia Governorate in Egypt. Specimens were addressed to investigate the role of natural infestation with parasites in secondary infection with Aeromonas and Vibrio species in a combination with unfavorable environmental conditions. Acanthocephalans (Acanthocentis tilapiae and Neoechinorhynchus sp.) and trematode/ digenean Euclinostomum heterostomum were isolated from the intestine and kidneys of O. niloticus, respectively. Aeromonas hydrophila, Vibrio alginolyticus, and Vibrio parahaemolyticus were isolated from different organs of some examined tilapias and identified biochemically by VITEK®2 compac system and by PCR. The water quality parameters were significantly elevated over the permissible levels, whereas an annual average elevation was detected in nitrite (0.06 ±0.08 mg/L) and un-ionized ammonia (0.31 ±0.29 mg/L). The prevalence of co-infections of Motile Aeromonas Septicemia (MAS) with acanthocephalan was the highest in summer season (33.3%). Additionally, the vibriosis with acanthocephalan infestation was the highest in summer (66.7%) and the lowest in winter (10.0%) in both cases. While co-infection of MAS with Euclinostomum heterostomum infestation together with the vibriosis were recorded the highest in summer with 50% and 100%, respectively, and the lowest was in winter (00.0%) in both cases. Histopathological alterations were recorded in different organs as gills, liver, kidney and spleen in affected fish. It could be concluded that bad water quality and parasitism may depress immunity and stress fish facilitating Aeromonas and Vibrio infections.  }, keywords = {PCR technique,trematodes,Acanthocephalans,Aeromonas hydrophila,Vibrio alginolyticus,Vibrio parahaemolyticus}, url = {https://ejabf.journals.ekb.eg/article_194394.html}, eprint = {https://ejabf.journals.ekb.eg/article_194394_680635fc9fbc71805d42990ea6c519e3.pdf} } @article { author = {Abba et al., El Hassan}, title = {Comparative study of zootechnical parameters between two species of salmonids; Oncorhynchus aguabonita and Oncorhynchus mykiss}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {741-751}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.194395}, abstract = {The main objective of this study is to compare the zootechnical parameters of two species of rainbow trout; Oncorhynchus aguabonita (mutant trout) and Oncorhynchus mykiss (wild trout) subjected to the same ecological and dietary conditions during the fry phase. The results showed that the alevins of mutant trout have better growth performance compared to the alevins of wild trout. The average weight gain, average daily growth rate, and food conversion efficiency during the experimental period are 6.67 g, 0.071 g/d, and 0.76, respectively, compared to only 3.47 g, 0.036 g/d, and 0.86 for wild trout. The results obtained during the experimental period are encouraging to give greater importance to the mutant variety Oncorhynchus aguabonita, which will contribute to the increased demand for animal protein and essential fatty acid for cardiovascular diseases.  }, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_194395.html}, eprint = {https://ejabf.journals.ekb.eg/article_194395_9977b4aad09bbfb8a25ad97f9934325f.pdf} } @article { author = {RIOUCHI et al., Ouassila}, title = {Qualitative and Quantitative Study of Dinoflagellate Cysts in Surface Sediments of the Nador Lagoon (North-East Morocco)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {753-765}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.194396}, abstract = {The qualitative and quantitative study of dinoflagellates (cysts and vegetative forms) was carried out on samples of surface sediment and water of the Nador lagoon (North-East Morocco), collected during winter in February 2019. Therefore, it was necessary to undertake a qualitative and quantitative study on dinoflagellate cysts and vegetative forms in parallel with the aim of specifying the factors that control the concentration of cysts in the sediments, as well as their specific diversities and blooms. Notably, dinoflagellates are of undeniable ecological interest and are considered as sentinel species of the quantity of water because they respond quickly to environmental changes due to their very fast life cycle. Moreover, their cysts, due to their extreme resistance and abundance in sediments, constitute an extremely important tool in the evaluation of current environments. Results showed that the total abundances of dinoflagellate cysts vary between a concentration of 720 cysts/g dry sediments (DS) and 7215 cysts/g DS. This work was mainly conducted to study the abiotic parameters of the Nador lagoon that control the concentration of cysts in the sediments and address their specific diversity and the dominance of one group over the other.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_194396.html}, eprint = {https://ejabf.journals.ekb.eg/article_194396_8b31644564d8bbf349fe5bbad1870d2a.pdf} } @article { author = {H. Y. Al-Maliky et al., Tariq}, title = {Effects of prebiotic and molasses on water quality, growth and survival of Metapenaeus affinis and Macrobracium nipponense in vitro, without changing water or adding pellets}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {767-783}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.194552}, abstract = {In Iraq, for the first time, rearing juveniles of two species of shrimps, Metapenaeus affinis and Macrobracium nipponense in vitro with the addition of the Probiotic, AquaStar-PondZyme, BI, and molasses has taken place. Various environmental parameters were measured for the in vitro water samples; the results were as follows; temperature: 24-27 °C, Ph: 7-8, salinity: 12-17‰, dissolved oxygen: 5-6 mg•L-1, ammonia: 0.170- 0.200 mg•L-1 and Nitrate: 6-9 mg•L-1. The growth analysis for M. affinis and M. nipponense were as follows: initial weight (gm) 3.442 ± 0.368 and 0.127 ± 0.015, while final weight (gm) was 4.454 ± 0.844 and 0.217 ± 0.032, specific growth rate (SGR) (%•day-1) 21.21 ± 4.02, 3.460 ± 2.639, with the two species having similar survival (%) 93.330 ± 11.750, respectively, over a 21-day period. Statistical analysis of M. affinis shrimp showed significant differences (p <0.05) between the rates of both initial and final weights, while there were no differences among the weight rates during other periods. The M. nipponense, on the presence of significant differences (p <0.05) between the rates of the final weights and both rates of primary and other periods weights, did not show significant differences (p> 0.05). In addition, six genera (from it species) of bacteria were recorded with a density of CFU•mL-100; and arranged by density as follows; Bacillus subtilis, Enterococcus spp., Streptococcus spp., Faecal coliforms, Escherichia coli, Staphylococcus spp. on shrimp cultivated; M. affinis and M. nipponense, respectively.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_194552.html}, eprint = {https://ejabf.journals.ekb.eg/article_194552_2b2e6b07bed086de6d80bd78c2e6f25d.pdf} } @article { author = {F. Darweesh et al., Kareem}, title = {Impact of tourism and fishing on the coral reef health along the west coast of the Gulf of Aqaba, Red Sea, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {785-805}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195147}, abstract = {To assess the anthropogenic impact on the Egyptian coast of the Gulf of Aqaba, particularly the tourism and fishing influences. Eighteen sites were surveyed from November 2019 to February 2020. At each site, coral cover was determined using Point Intercept Transect (PIT) method, at depths of 3 and 8 m. Also, abundances of invertebrate species were determined by the belt transect method at the same depths for each site. Mean of cover percentages of corals (hard and soft) at Dahab sector ranged from 16.7 to 64.0 % at 3m, and from 3.3 to 56.0 % at 8m. At Nuweiba’a, it ranged from 7.3 to 55.3 % at 3m and from 4.0 to 30.0 % at 8 m. Statistical analyses confirmed that there were significant differences in coral assemblage in relation to depth and sites. A total of 78 invertebrate species were recorded and counted from the two depths at the two sectors. Of which, the molluscan, Tridacna sp. and the echinoderms, Echinometra mathaei and Diadema setosum were found to be the most abundant species at the two sectors as well as at both depths. In addition, the abundance and assemblages of recorded key invertebrate species were varied among the sectors. Comparison of the influences of tourism and fishing showed several observations suggested a moderate decline in coral cover and key invertebrate species, with a notable increase of total algal cover in the Nuweiba’a sector.}, keywords = {Benthic Cover,Coral reef,Key invertebrates,tourism,Overfishing,Dahab,Nuweiba’a,Red Sea,Egypt}, url = {https://ejabf.journals.ekb.eg/article_195147.html}, eprint = {https://ejabf.journals.ekb.eg/article_195147_3a3768c22e380472c592656c2c1e9777.pdf} } @article { author = {F. Attalla et al., Raky}, title = {Effects of Some Feed Additives on Growth Performance and Physiological Parameters of Oreochromis niloticus}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {807-821}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195160}, abstract = {A 100- day study was conducted to evaluate the influence of two natural additives in the tilapia diet on growth, food performance and physiological conditions. Hence, six treated diets (30 % protein, 3000 k cal) were used; the control (0% additives) and diets1, 2 and 3, containing 1%, 2% & 3% dried mulberry leaves (ML), respectively. Whereas, diets 4, 5 and 6 contained 1%, 2% & 3% dried guava leaves (GL). Fish were stocked in ponds with 30 fish/ part (2.5 x 2 x 1.5 meters), and an initial average weight of 24 ± 0.5 g. The best bodyweight gain, specific growth rate, feed conversion ratio and protein efficiency ratio were recorded for the fish fed on diets 4 & 5, which contained 1% & 2% of guava additive. Whereas, fish fed on diet 1 with 1% mulberry leaves (p < 0.05) was rated the next, compared to fish fed on the control diet. The results revealed that the addition of guava leaves powder with levels 1% and 2 %, followed by 1% mulberry improved fish growth performance and feed utilization. In all fish treatments, the carcass composition data detected an increase in protein content accompanied by a decrease in fat percentage. Fish physiological measurements (plasma glucose, cholesterol and triglycerides) revealed that supplementing the Nile tilapia diets with the ML and GL showed a  significant decrease (p < 0.05) if compared with the control. An increase was recorded in the plasma total protein and globulin levels in all treated fish, compared to the control group, and accompanied with optimal liver enzymes activity. Hence, both ML and GL proved their beneficial impact on fish performance and nutrient utilization besides their role in enhancing the immune system of fish through vitamin C content in guava leaves that helps to maintain the health of blood vessels.}, keywords = {Nile tilapia,mulberry leaves,Guava leaves,Feed additives,Growth performance,physiological parameters}, url = {https://ejabf.journals.ekb.eg/article_195160.html}, eprint = {https://ejabf.journals.ekb.eg/article_195160_8873c353d8160018a9bc679bffb39680.pdf} } @article { author = {Izzabaha et al., Omar}, title = {Growth rate, condition index, and cultural potential of the brown mussel Perna perna (Linnaeus, 1758) reared in a submerged longline system in Dakhla Bay, Morocco}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {823-837}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195268}, abstract = {This study is designed to monitor the zootechnical performance of the African mussel "Perna perna" in submerged longline at the Boutalha area in Dakhla Bay, for two production cycles carried out during the years 2019 and 2020. The first rearing cycle started on March the 26th, 2019 with a spat of mean size 19.1±3.23 mm, and a mean weight of 0.79±0.32 g. While the second cycle was launched on January the 6th, 2020 by rearing the spat of mean size 22.31 ± 3.12 mm and mean weight of 2.24±1.52 g. A sampling of mussels was done monthly for the growth monitoring and the daily monitoring of physicochemical parameters of the farming medium.  The results showed that the growth rate was almost similar for both rearing cycles, with a gain in length/ weight of about 6.57mm/2.75g and 5.98mm/2.86g, respectively for the first and second cycles. The live weight/growing rates recorded respectively for the first and second cycles, once the commercial size (60mm) was obtained,  were 20.01±5.24g/ 19.97% and 22.28±6.65g/16.83% achieving a filling rate of 38.07%/37.94%, thereafter the rearing period was 6.5 months/7 months. Regarding the production and biomass, the results revealed that the biomass per longline exceeded the value of 9.5 tons for both cycles.  }, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_195268.html}, eprint = {https://ejabf.journals.ekb.eg/article_195268_31b37af525bf360eef12f5173861c1c4.pdf} } @article { author = {Y. El-Dakar et al., Ashraf}, title = {The optimum level of dietary protein and feeding for improving the growth performance and feed efficiency of juveniles Hybrid tilapia (Oreochromis niloticus× Oreochromis aurea) reared in brackish water}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {839-856}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195285}, abstract = {A 6-weeks factorial trial (2 × 2) was conducted to determine the optimum level of dietary protein and the optimum feeding rate for the best growth and feed efficiency of hybrid tilapia, Oreochromis niloticus × Oreochromis aurea. Two dietary protein levels were examined; 27% and 34% CP with 5% and 7% of the biomass, and each treatment was performed in triplicate. Twelve plastic tanks (54 × 38 × 28 cm: L × W × H) were used to accomplish this work. The average initial weight was determined (7.5 ± 0.16 g), and fish samples were stocked (12 juveniles/tank).  Fishes were fed three times daily and 6 days weekly. The water was daily exchanged at a rate of about 20% of water volume/tank. Results showed that dietary protein levels (from 27% to 34%) did not significantly affect either growth or feed usage parameters. However, 7% feeding rate had significantly higher growth parameters than 5%. Statistical analysis of the interaction between dietary protein and feeding levels showed that fishes fed at 7% as the feeding level with dietary protein at 27% or 34% was significantly higher in growth than those fed at 5% with the same diets. Additionally, results confirmed the significant difference in specific growth rate and survival rate of fishes fed at 7% as feeding rate with any diet protein level. Thus, this study suggests that 27% CP with 7% as feeding rate is more for the best growth of hybrid tilapia juvenile under the same conditions of this trial.}, keywords = {Dietary protein level,feeding level,hybrid tilapia,growth parameters,feed utilization}, url = {https://ejabf.journals.ekb.eg/article_195285.html}, eprint = {https://ejabf.journals.ekb.eg/article_195285_a8f13571fcae9ea6ef08884c211bb80d.pdf} } @article { author = {Y. Herawati et al., Endang}, title = {Analysis of Plankton Intake to the Growth and Omega-3 Fatty Acid Content of Milkfish (Chanos chanos Forsskal, 1775)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {857-869}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195288}, abstract = {The aim of the present study was to examine the food, growth, and omega 3 fatty acid content of milkfish (Chanos chanos) in Sidoarjo fish pond, East Java. The study was conducted by spreading 5,000 fish milkfish seeds (5-7 cm long and 0.6-1.0 g) to the fish pond. The length and weight of milkfish were measured, and the digestive tract was isolated. For sampling, a plankton net was used and samples were preserved in 1% Lugol solution. Data were analyzed to determine the food type and selection, growth rate, relative intestine length, and weight length relationship. The recorded relative intestine length of milkfish was 5.4-6.4 cm and was categorized as herbivorous fish. The food type was phytoplankton with a length of <14 cm and zooplankton with a length of >15 cm. The proportion of zooplankton in the fish intestine increased with its size. The phytoplanktons found dominantly in the digestive tract were Chaetoceros sp. and Nitzschia sp.and zooplankton were Calanus sp < em>. and Cyclop sp < em>. The daily length growth rate ranged from 0.008 to 0.283 cm, while the daily weight growth rate ranged from 0.5 to 1.16 g. The length-weight relationship of milkfish (Chanos chanos) can be determined by equation W=0.1466x with the regression index R2=1. Thus, milkfish (Chanos chanos) tended to have isometric growth patterns with the length and weight and were directly proportional to the omega-3 content in the milkfish body}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_195288.html}, eprint = {https://ejabf.journals.ekb.eg/article_195288_a52550986ba91d001b8090198899c61f.pdf} } @article { author = {Masood et al., Zubia}, title = {Relationship between different linear dimensions of scale parameters of four species of Mugilidae from Karachi Coast, Pakistan}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {871-881}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195826}, abstract = {The present investigation was conducted to work out linear regression relationships among six parameters scale length (TLS), scale width (WDS), number of ctenii found in horizontal (HRS)and vertical rows (VRS) on the scale, total radii counts (RDS), the vertical distance between focus and outer posterior edge of scale (Rs) in four commercially important mugilid species viz.,  Liza melinoptera, Liza macrolepis, Valamugil speigleri and Mugil cephalus)of family Mugilidae.  The obtained results revealed that the most correlations between scale length (TLS) or width (WDS) with the selected scale parameters (HRS, VRS & Rs) were found to be weak (r < 0.50) and highly significant at 5% level (t-test; p < 0.05). Thus, the present study adopted to focus the implication of some functional scale characters that could be used as valuable alternative tools in observing the systematic relationship between different genera or species or geographical variants of family Mugilidae.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_195826.html}, eprint = {https://ejabf.journals.ekb.eg/article_195826_83825bffb82d46b97d2e6f73c0b205f6.pdf} } @article { author = {M. Ali et al., Safaa}, title = {Histological study on the effect of sodium bentonite nanoparticles on the earthworm, Allolobophora caliginosa (Lumbricidae: Annelida)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {883-898}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195938}, abstract = {Bentonites are used on a large scale, by farmers and the feed industry, as a feed supplements to adsorb mycotoxins. The presence of mycotoxins in feed affects its quality, animal safety, and human health. Food additives must be used carefully as they may contaminate food and became harmful to the environment and food consumers. The present work studied the effect of two different concentrations of sodium bentonite on the body wall, gut, and coelomic cells of earthworms. The results revealed a change in the behavior of earthworms and the occurrence of a great alteration in the tested samples but no mortality was recorded. Coelomic cells aggregated, vacuoles and pseudopodia were formed.}, keywords = {Sodium bentonite,Nanoparticle,earthworm,Body wall,Coelomic cells}, url = {https://ejabf.journals.ekb.eg/article_195938.html}, eprint = {https://ejabf.journals.ekb.eg/article_195938_6d923defbc0372e9d6898090afe020e6.pdf} } @article { author = {Abou-Taleb et al., Mohamed}, title = {Effect of different cooking techniques on quality characteristics of some fish species}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {899-907}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195947}, abstract = {         This work was performed to study the effect of cooking techniques on the quality characteristics of some fishes. Four samples; Mugil cephalus, Liza ramada, Tilapia zilli, and Solea vulgaris were obtained from Qarun Lake as the most important and abundant fish. All samples were manually filleted, brined, and then cooked using frying, microwave, and halogen techniques. Sensory, physicochemical, and microbial properties of raw and cooked fillets were determined. The results indicated that fried fish products were the best in texture and acceptability compared with microwave and halogen-cooked products. Cooking methods led to changes markedly in the values of moisture, pH value, total volatile basic nitrogen (TVBN), trimethylamine (TMA), thiobarbituric acid value (TBA) and total plate count (TPC), while increased levels of protein, fat, and ash contents. In conclusion, the quality properties of different cooked fishery products are dependent mainly on fish species and the cooking method used. }, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_195947.html}, eprint = {https://ejabf.journals.ekb.eg/article_195947_b3f4740b9da588455afaae958310cf66.pdf} } @article { author = {A. El-Sherif et al., Shaban}, title = {Nutritional composition and amino acid profile of the crayfish byproduct meal}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {909-915}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195951}, abstract = {The present work aimed to study the chemical composition and quality criteria of crayfish by-products and utilization of these wastes to reduce environmental pollution and produce economic crayfish meal. Also, chemical composition, amino acid composition, and bacteriological evaluation of crayfish meal were carried out. The results showed that fresh crayfish wastes contained 72.15±0.22% moisture, 15.30±0.09% protein, 3.25±0.02% fat, 8.95±0.11% ash, 0.35±0.01% carbohydrates, 15.06±0.05 TVB-N (mg/100g), 0.45±0.01 TMA (mg/100g) and 0.18±0.01 TBA (mg MDA/kg) (on wet weight basis), while pH value was 6.72±0.12 and 4.30 ±0.06 TBC (log10 cfu/g). On the other hand, crayfish byproducts meal had 7.35± 0.95% moisture, 61.75±0.22% crude protein, 6.02±0.09% fat, 23.66±0.06% ash, 1.22±0.05% carbohydrates, and 21.15% yield. Also, the high nutritional quality crayfish byproduct meal was confirmed by the high of total amino acids (TAA, 73.90 g/16g N), total essential amino acids (TEAA, 34.62 g/16g N), amino acid index (AAI, 67.66%), and biological value (BV, 67.66 %). Total bacterial count and thermophilic bacterial count were 2.71 and 0.35 log10cfu /g sample indicated the high safety of crayfish meal. In conclusion, crayfish byproducts showed not be neglected because of the relatively high nutritional value, suggesting their use as feed additive during feeding chicks, chicken, and fish, i. e. as in the fish meal.}, keywords = {Crayfish,Amino acids,TBV-N,TMA,tba,TBC}, url = {https://ejabf.journals.ekb.eg/article_195951.html}, eprint = {https://ejabf.journals.ekb.eg/article_195951_49a60deea6d58f073cf3649e7278e359.pdf} } @article { author = {H. Fadda, Susan and F. Attalla, Raky}, title = {Effect of Chlorella-based diets on growth of the silver carp, Hypophthalmichthys molitrix}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {917-928}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.195962}, abstract = {This study was conducted to investigate the effect of Chlorella vulgaris dried additive on the growth, feed utilization, and biochemical parameters of silver carp fingerlings. The trial was conducted in outdoor concrete rectangular ponds (4 m × 10 m × 1.5 m, WLD). Fish were reared in duplicate groups of 60 silver carp fingerlings with an average initial body weight and length of 1.7± 0.03 g and 5.8 ± 0.6 cm /fish, respectively, for 16 weeks. Four experimental diets (35%, protein) were formulated containing 1, 2, 3, and 4% of dried Chlorella powder, and a control diet (without additives). Results showed that the growth parameter for experimented fish was significantly (p < 0.05) affected by the tested additive. The optimal values of feed conversion and protein efficiency ratios were recorded for the fish-fed diets (3 & 4). Hepato-somatic index (HIS) was significantly (p < 0.05) affected by experimental diets, however, viscera somatic index (VSI) was insignificantly affected (p>0.05). Blood and biochemical parameters were affected by Chlorella inclusion. The present results cleared enhancement of the growth, biological, physiological, and immunity factors of the treated fish by the chlorella additive.}, keywords = {Silver carp,Feed additives,Chlorella,biochemical parameters}, url = {https://ejabf.journals.ekb.eg/article_195962.html}, eprint = {https://ejabf.journals.ekb.eg/article_195962_9081a357ec029566b96785f38c49872b.pdf} } @article { author = {Van Hoa et al., Nguyen}, title = {The combined effect of stocking density and C/N ratio on growth performance and biomass production of Artemia reared in a biofloc system under laboratory culture conditions}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {929-938}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.196216}, abstract = {The combined effects of different densities of Artemia and C/N ratios reared in a biofloc system on growth and biomass production of Artemia were assessed under laboratory conditions. A 3×4 factorial experiment with three levels of Artemia density (500, 750, and 1000 nauplii/L) and three C/N ratios (5, 10, and 15) was randomly designed in four replicates.  Newly-hatched Artemia nauplii were reared in 1.5 L bottles containing 1 L of seawater at 30‰. Molasses with a 38% carbon content was used as a carbon source to stimulate bacterial growth in the Artemia culture medium. The amount of molasses added was based on a concentration of total ammonia nitrogen (TAN) in the culture medium. Results showed that significant interaction effects between Artemia density and C/N ratios were not observed for growth, survival and biomass production. The manipulation of C/N at 5 and 10 promoted better growth of Artemia in terms of length compared to that obtained by Artemia in the higher C/N ratio. However, it was not clear whether there was an increase in growth performance in the culture where Artemia were reared at high densities. Moreover, the addition of molasses produced biomass in stocking density at 500 ind./L that was nearly similar to that obtained in the 750 and 1,000 ind./L.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_196216.html}, eprint = {https://ejabf.journals.ekb.eg/article_196216_e80c19ae167702c0caa14693d6e6267c.pdf} } @article { author = {M. A. Elraey et al., Said}, title = {Tegumental ultrastructures of the intestinal cestode Proteocephalus pentastoma (Proteocephalidea), parasitizing Mormyrus kannume of the River Nile}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {939-951}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.196289}, abstract = {Transmission electron microscopic studies on the tegument of mature proglottid of Proteocephalus pentastoma infesting Mormyrus kannume revealed the presence of two types of microtriches (filiform and spiniform) and a delicate glycocalyx screening the tegument exteriorly. The syntegument rets were monitored internally on a thin basal lamina and contained light membrane-bounded vesicles, dim bodies with no bordering membrane, electron-dense granules, large excretory vesicles, and few ovoid mitochondria that were more concentrated near the basal lamina. A delicate fibrous layer was detected confirming the syntegument with the underlying cytotegument. Networks of poorly developed muscular bundles were found down the distal cytoplasm containing circular, longitudinal, diagonal, and deep patches of ventral muscle bundles, respectively. In the current study, fine structures of various cytotegumental cells and the syncytial structures of the osmoregulatory ducts were described in detail.  }, keywords = {Ultrastructure,tegument,Cestoda,Proteocephalus,M. kannume,Nile River}, url = {https://ejabf.journals.ekb.eg/article_196289.html}, eprint = {https://ejabf.journals.ekb.eg/article_196289_7caddc9cba97379bbe94d58197e44924.pdf} } @article { author = {A. Abd Elnaby, Faiza and M. Abdelsalam, Khaled}, title = {New records of marine Annelida (Polychaeta) in the Egyptian coast, eastern Mediterranean Sea}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {953-965}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.196333}, abstract = {The current work aims to study the biodiversity of marine fouling organisms in Marina El-Alamein Resort, to discover the newly recorded Polychaeta species. In February, April, July, September, and November 2017, samples of marine fouling were collected from the area of study. A total of 61 fouling taxa were identified in the samples. Polychaeta was the most diverse group, represented by fifteen species, constituting 25% of the total number of recorded taxa. Three of them were first recorded in the Egyptian Mediterranean Sea, including one sedentarian species (Protoaricia oerstedii) and two errantian species (Myrianida brachycephala and Syllis jorgei). These species extend through the Atlantic Ocean and the Mediterranean Sea, but the distribution of P. oerstedii in the Red Sea may indicate its anti-Lessepsian behavior. A concise re-description provided with illustrative photos, remarks, and distribution of these species are given. }, keywords = {Fouling,New records,eastern Mediterranean Sea,Taxonomy,Polychaeta}, url = {https://ejabf.journals.ekb.eg/article_196333.html}, eprint = {https://ejabf.journals.ekb.eg/article_196333_a8fe557a6f8adc88e470a5e8c9160278.pdf} } @article { author = {F. Attalla et al., Raky}, title = {Influence of olive leaves additive on growth and physiological parameters of Sarotherodon galilaeus}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {967-979}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.196335}, abstract = {A 100- day study was conducted to evaluate the effect of dried olive leaves on the growth rates, biochemical parameters, and physiological activities of the tilapia (Sarotherodon galilaeus), with an initial body weight 33 ± 1.0g reared in a concrete pond. Test fish fed three diets, 30 % crude protein (CP) and 3000 kcl containing 1, 2, and 3% olive additive, besides the control (0% additive). Optimum results of growth parameters, total weight gain, and specific growth rate (TWG and SGR) were recorded for fish-fed diets with 2 and 3% olive leaves. The best ratios of feed conversion (FCR) and protein efficiency (PER) were recorded with values of 1.86±0.11 & 2.0±0.42, respectively, for fish fed on the treated diet (3). Results indicated that diet containing olive leaves were palatable with optimal digestive rate. The protein content of body fish increased significantly through all the treated diets compared to that of the control. Olive additive improved plasma total protein, albumin, and globulin levels, accompanied with optimal promising findings of plasma aminotransferases (AST and ALT) activities. In addition, a significant reduction in plasma glucose, cholesterol, and triglycerides levels were detected for the three test fish-fed olive supplemented diets. In conclusion, olive leaves could improve the growth and physiological parameters in cultured Sarotherodon galilaeus.}, keywords = {Sarotherodon galilaeus,Growth,physiological activities,Olive leaves}, url = {https://ejabf.journals.ekb.eg/article_196335.html}, eprint = {https://ejabf.journals.ekb.eg/article_196335_8c3869ef10d42d5ca0cf69db273c332d.pdf} } @article { author = {F. Zohra et al., Bouhali}, title = {The integration of aquaculture with agriculture in a semi-arid region in Northwest of Algeria}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {981-1001}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.196769}, abstract = {The aim of this study is to contribute to the realization of the project, which relies on integrating fish farming into agriculture. It consists of evaluating the effect of irrigation with fish farming water on plant growth and yield of cultivated species, in order to minimize the use of chemical fertilizers. All parameters of water were analyzed: the potential of hydrogen (pH), conductivity (CE), calcium (Ca2+), sodium (Na+), nitrate (NO3+), sulfate (SO42-), magnesium (Mg2+), potassium (K+), and chloride (Cl-). The analyses of potable and fish farming waters indicated that all studied parameters are balanced means that waters are appropriate for irrigation. In addition to analyzes of water, soil parameters were measured: the potential of hydrogen (pH), conductivity (CE), organic matter (OM), the mean weight diameter (MWD), chloride (Cl-), sulfate (SO42-), calcium (Ca2+), magnesium (Mg2+), limestone (CaCO3). For the realization of our experience, we choose the tomato (Solanum Lycopersicum) as a corps. We planted the seeds in special seedling pots, divided into 03 sections: Section irrigated with potable water, Section irrigated with fish farming water, and the last section irrigated with potable water with the addition of chemical fertilizers. The three tests summarize that the plant irrigated with potable water plus the fertilizer has similar results to the plant irrigated by fish farming water. Moreover, Plant development is highly adaptive to environmental conditions. On the contrary, plants irrigated with potable water have slow growth and a low yield. }, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_196769.html}, eprint = {https://ejabf.journals.ekb.eg/article_196769_a5f4931af8768f4c32e17c39b3414431.pdf} } @article { author = {Thanh Long et al., Nguyen}, title = {Small-scale Trawl and Gillnet Fisheries in the Vietnamese Mekong Delta}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {1003-1015}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.196897}, abstract = {To obtain insights into small-scale fishing activities in the Vietnamese Mekong Delta, 180 trawlers and 180 gillnets fishing households were interviewed. Furthermore, 30 fish merchants were interviewed to understand the fish channel market, while economic fish species composition was determined through the sampling of 30 trawlers and 30 gillnets households. The results showed that both trawl and gillnet fishing operated throughout the entire year. The trawl fishing vessels cover significantly longer time trips (1.9 days) on average compared to the gillnet vessels (1.5 days). Fishing yield calculated per HP of trawlers (0.895 ton/HP/year) was seven times higher than that of the gillnets (0.128 ton/HP/year). The percentages of bycatch in both trawler and gillnet were found to be lower in relation to a previous study. This would suggest that the economic efficiency of trawlers and gillnets has improved. A large proportion of total fish was sold to traders/wholesalers and then transported to processing factories and later sold to the retailers at local markets. The caught economic fish species from the two fishing activities showed typical species assemblages representative of fishing gears. Inclement weather and lack of capital were two of the main highlighted constraints for fishing livelihood survival.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_196897.html}, eprint = {https://ejabf.journals.ekb.eg/article_196897_caf6f60f2777850d99050c4048cfa6be.pdf} } @article { author = {I. Mehrim et al., Ahmed}, title = {Whey protein concentrate powder as a growth promoter and an immunostimulant agent for Oreochromis niloticus (Linnaeus, 1758) fingerlings}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {1017-1033}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.196898}, abstract = {      Due to their nutritive value and functionality, whey proteins have been used in many food applications. The efficacy of adding different levels (0, 5, 10 and 20 g kg–1 diet) of whey protein concentrate powder (WPCP) was addressed on the growth performance, feed utilization, and the immune responses of Oreochromis niloticus fingerlings in the current study for 8 weeks. A significant increase was observed in the growth performance (final weight, total weight gain, average daily gain, relative growth rate, and specific growth rate), the feed utilization (feed conversion ratio, protein efficiency ratio, protein productive value, and energy utilization), and the whole-body composition (dry matter, and crude protein) parameters. These levels also significantly improved both the hematological parameters (hemoglobin, red blood cells, packed cell volume, and platelets), and the immune responses indicators (white blood cells, lymphocytes, and serum immunoglobulin M) of the O. niloticus fingerlings. Partially, in all tested parameters, the addition of the high-level 20g WPCP kg–1 diet showed a remarkable superiority among other levels. Remarkably, the beneficial use of WPCP at the level of 20 g kg–1 diet was proved as a promising growth promoter and immune stimulant agent for O. niloticus fingerlings, and may in return, increase fish productivity, health, and profitability in fish farms.}, keywords = {Aquaculture,Nile tilapia,whey protein,Feed additives,Growth,Immune}, url = {https://ejabf.journals.ekb.eg/article_196898.html}, eprint = {https://ejabf.journals.ekb.eg/article_196898_0a4acf531f61b2a28a44a4f38cb67ca6.pdf} } @article { author = {Islam et al., Md. Latiful}, title = {Fattening of the Mud Crab Scylla olivacea (Herbst, 1896): An Integrated Multi-trophic Aquaculture (IMTA) Approach}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {1035-1047}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.196903}, abstract = {Integrated multi-trophic aquaculture (IMTA) uses co-products of one species that are automatically recycled as an input for other species to get a high profit. Considering IMTA, a vertical intensification of mud crab (Scylla olivacea) fattening was carried out at the pond’s bottom and in the floated cages. Genetically Improved Farmed Tilapia (GIFT) strain of Oreochromis niloticus was integrated with crabs in the free pond areas to increase farm output. The experiment was designed with three different treatments, such as crab stocked in earthen ponds (T1), crab stocked in earthen ponds with floated crab cages (T2), and crab stocked in earthen ponds with the integration of floated crab cages and GIFTs (T3). Water quality was monitored regularly to keep the parameters (i.e., temperature, salinity, water pH, dissolved oxygen, alkalinity, and ammonia) within the optimum range for aquatic organisms. The survival rate of crab was significantly higher in T2 and T3 compared with T1. In addition, T2 and T3 were also significantly higher in crab production than T1. Crab productions in the ponds were significantly lower than productions in the floated cages. Besides, the tilapia growth was also found consistent with a moderate survival rate in two consecutive years. Hence, the multi-trophic culture system supports farming mud crab and tilapia combinedly. This study advocates starting IMTA at a large scale at different crab farms. Moreover, some other high-value species may be considered for future research in addition to GIFTs.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_196903.html}, eprint = {https://ejabf.journals.ekb.eg/article_196903_e0b48bfbf96e49fa067072bc54f4978a.pdf} } @article { author = {Morsy El-Senousy, Waled}, title = {Suitability of some viruses as indices of viral pollution of water}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {1049-1084}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.197187}, abstract = {Water quality is of great importance for public health. Any defect in water treatment may lead to the presence of pathogens such as pathogenic bacteria and viruses in different types of water such as drinking or irrigation water. Traditional regulations (usually used to determine water quality from a microbiological point of view) became non-sufficient because Coliform bacteria, Escherichia coli (E. coli), and Coliphages are not sufficient as indicators of water quality. They do not express accurately the presence/absence of enteric viruses. Any mistake in the estimation of the presence/absence of enteric viruses in water samples may lead to a big threat to human health. However, enteric viruses cause many diseases such as hepatitis, gastroenteritis, conjunctivitis, myocarditis, fever, rash, and may be diabetes. So, it is necessary to find viral indices to express correctly the presence/absence of enteric viruses in drinking water samples. Several scientific types of research were done to investigate viral indices expressing the viral pollution of the water. The objective of this review is to estimate the most suitable viral index/indices to express the viral pollution of water.}, keywords = {viral index,viral indicator,enteric viruses,Drinking water,Irrigation Water}, url = {https://ejabf.journals.ekb.eg/article_197187.html}, eprint = {https://ejabf.journals.ekb.eg/article_197187_19d09aadf4a52be180c74edaf2d77717.pdf} } @article { author = {Eissa et al., Alaa Eldin}, title = {Morphological, molecular and clinical assessment of different Anisakis species infecting horse Mackerel Trachurus trachurus from South Mediterranean}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {1085-1098}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.197270}, abstract = {This study aimed to identify and characterize the most common Anisakis larvae infecting Atlantic horse Mackerel (Trachurus trachurus) in the South Mediterranean basin; based on morphological and advanced molecular characterization. Also, the linkage between the prevalence of Anisakis spp. larvae and some biological variables including Mackerel age and sex were also investigated. Moreover, the clinical intensity of larvae infection in different organs of infected Mackerel was assessed. Atlantic horse mackerel collected from the southern Mediterranean shores were found to be infected with third stages larvae (L3) of Anisakis species. The Anisakis larvae were found encapsulated as coiled tightly in different fish organs and uncoiled freely in the abdominal cavity of infected T. trachurus. These larvae were categorized into 3 types of Anisakis spp. as A. simplex type1; A. pegreffii; Anisakis simplex / pegreffii hybrid based on their morphological and molecular characterizations. Subsequently, the phylogenetic analysis of ITS region of different investigated larvae confirmed the identification of collected Anisakis spp. The remarkably high intensity of Anisakis spp. larvae in Mackerel gonads warns of possible future deleterious impacts on the growth, development and sustainability of Mackerel fisheries at the south Mediterranean coasts.}, keywords = {Atlantic horse mackerel,Anisakidae,A.simplex type1,A. pegreffii,Anisakis simplex/ pegreffii hybrid,Zoonotic Parasites}, url = {https://ejabf.journals.ekb.eg/article_197270.html}, eprint = {https://ejabf.journals.ekb.eg/article_197270_97722392269df2f96b06b30c6b2d064a.pdf} } @article { author = {El Ghizi et al., Sara}, title = {Assessment of heavy metal contamination in the water of Dayet Er-Roumi Lake (Morocco)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {1099-1115}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.197307}, abstract = {The Dayet Er-Roumi Lake is one of the main Lakes in Morocco (SIBE), it’s the only permanent continental Lake of low altitude. In recent decades, a significant deterioration in water quality generated by various pollutant discharges has been identified. The present study aimed to evaluate the metal contamination, assess the pollution degree and quantify Dayet Er-Roumi’s water quality through Spatio-temporal monitoring of several metallic trace elements: Fe, Pb, Zn, Mn, Al, Cr, and Ba during 2019 in four seasons. Seven different sampling points were selected along the study area. The results revealed that the heavy metals concentrations in water varied widely and exhibit fluctuations among different metals during the beginning and end of the present study, the order of abundance of these metals  Al > Fe > Zn > Mn > Ba > Pb > Cr. According to the correlation analysis, highly strong positive correlations were observed among some heavy metals (between Al, Ba, Zn, and Fe), suggesting common sources and identical behavior during their transport. The calculated average of Heavy metal Pollution Index (HPI), based on the critical pollution index (100), denotes that the lake is suffering from serious metal pollution (HPI = 210.665 > 100), the highest level of HPI was recorded during two seasons: spring  (HPI = 651.362) and summer (HPI= 159.945). Overall, the results of HPI show a high degree of contamination indicating serious anthropogenic pollution. The obtained results confirmed that the anthropogenic activities, (agricultural and domestic, etc…) have a considerable impact on the water quality characteristics of the lake.}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_197307.html}, eprint = {https://ejabf.journals.ekb.eg/article_197307_07d4eef7b17c851b934bdc2432d05e2c.pdf} } @article { author = {D. Hasanen et al., Gaber}, title = {Reproductive biology of the Golden grey mullet Liza aurata (Risso, 1810) in Bardawil Lagoon, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {1117-1128}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.198365}, abstract = {This study deals with information about the reproductive biology of the golden grey mullet, Liza aurata from Bardawil Lagoon, North Sinai, Egypt. Monthly random samples of Liza aurata were collected from the commercial catch in different landing sites of the Bardawil Lagoon during one fishing season from May 2017 to February 2018. Sex ratio, length at first maturity (Lm), and gonado-somatic index (GSI) were addressed.  During the whole period of the current study, the sex ratio showed that the females (F) outnumbered the males (M) (1M: 1.5F). The GSI was found to be greatest from November to January and reached its highest value in December, considering that Liza aurata is a winter spawner. The Lm was determined as 20.0 cm for females and males. The length at first capture (Lc) was estimated to be 19.5 cm. It is essential to maximize length at first capture larger than a length at first sexual maturity (> 20.0 cm) . This can be achieved by widening the mesh size used to catch Liza aurata to permit the fish to breed, recruit and maintain the stock of this fish. }, keywords = {Bardawil Lagoon,Liza aurata,Gonado Somatic Index,Length at first maturity}, url = {https://ejabf.journals.ekb.eg/article_198365.html}, eprint = {https://ejabf.journals.ekb.eg/article_198365_091d36328476156a756ef5f7996c2913.pdf} } @article { author = {M. Tahoun et al., Usama}, title = {Qualitative and Quantitative Variability of Flora and Fauna along Rosetta Branch of the River Nile, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {25}, number = {4}, pages = {1129-1158}, year = {2021}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2021.198550}, abstract = {During the last decades, the Rosetta branch of the River Nile received a great number of drainage wastes (domestic, agricultural, and industrial) that affected different aquatic organism’s life. Accordingly, characterizing the biological aspects of this water body is necessary. The current study aims to survey the biodiversity of flora and fauna along the Rosetta branch to assess the environmental status of this area. Eight sites were selected along the Rosetta branch during 2018 for samples collection. Results indicated the presence of seven macrophyte species, dominated by the free-floating and emergent species Eichhornia crassipes and Echinochloa stagnina, respectively. Bacillariophyceae had the highest number of species compared with other groups of attached algae and occupied the first and the greatest predominance position. Epiphytic microinvertebrates associated with the floating plant Eichhornia crassipes recorded the highest numbers of species and groups during summer and the diversity was affected by the heavy load of pollution discharged to the Nile (especially at El-Rahawy region). Five groups of zooplankton (Rotifera, Copepoda, Cladocera, Meroplankton, and Protozoa) were documented and identified based on their morphological characters. High numbers of bacterial indicators of pollution exceeding the permissible limits were obtained, inferring the harmful effects of drains discharge on the water quality at the Rosetta branch. Physico-chemical parameters showed a great correlation between different biological aspects. The current study confirmed the effects of environmental factors on surveyed aquatic organisms, which could be used as a guide for evaluating water quality in the evaluated area.}, keywords = {macrophytes,microalgae,Microbial assessment,Zooplankton,Micro invertebrates}, url = {https://ejabf.journals.ekb.eg/article_198550.html}, eprint = {https://ejabf.journals.ekb.eg/article_198550_12a773f89688ee810500fddb00bc143c.pdf} }