@article { author = {A. M. Shokr, Elsayed}, title = {Effect of Copper on Hematological, Biochemical Changes and Reproductive Hormones of the Nile tilapia Oreochromis niloticus}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {1-18}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.76626}, abstract = {The effect of copper concentrations on alterations in hematological and biochemical parameters as well as  reproductive hormones of the Nile tilapia Oreochromis niloticus was investigated. The copper sulfate at sub-chronic concentrations 25, 50 and 75 µg/L on Oreochromis niloticus for 90 days of exposure. Significant changes (P ˂ 0.05) in almost all hematological aspects were found in the all groups exposed to different concentrations of copper 25, 50 and 75 µg/L for 90 days. Biochemical analysis revealed various significant (P ˂ 0.05) differences among the all groups that exposed to 25, 50 and 75 µg/L of copper for 90 days of exposure. There was a significant difference in the copper concentrations in the tissues (P ˂ 0.05) among all treated groups; in liver, gills and kidney. Glucose and cortisol in fish plasma increased significantly, while total protein and total lipids decreased significantly due to copper stress. The obtained results showed also that copper stress was harmful to the fish liver and kidney, where plasma aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, uric acid, and creatinine values were significantly increased with the increasing exposure of copper on Oreochromis niloticus for 90 days compared to the control one. Plasma follicular stimulating hormones (FSH), 17ß estradiol (E2) and testosterone (T) were decreased significantly in fish with the increasing exposure of copper concentrations. Among antioxidative enzymes, significant changes were revealed mainly in plasma ceruplasmin and glutathione reductase and glutathione peroxidase activity in liver and gills (P ˂ 0.05. The results demonstrate the deleterious influence of copper on Oreochromis niloticus, even at low doses. So, it is recommended to not use copper too much during  treatment  of the water that used in growing the fish.}, keywords = {copper,Oreochromis niloticus,antioxidant,hematology,biochemistry}, url = {https://ejabf.journals.ekb.eg/article_76626.html}, eprint = {https://ejabf.journals.ekb.eg/article_76626_9fda20e775ab6942e5e2233d327395d9.pdf} } @article { author = {H. Hashem, Medhat and I. Tayel, Safaa and A. Sabra, Ebrahim and M. Yacoub, Amal and A. Heiba, Anas}, title = {Impact of the water quality of El-Rahawy Drain on some g enetic and histopathological aspects of Oreochromis niloticus}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {19-38}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.78272}, abstract = {The present study aims to evaluate the water quality of two locations in Rosetta Branch of River Nile and its histopathological and genetic adverse effects on Nile tilapia (Oreochromis niloticus). Water and fish samples were collected from up and downstream of El-Rahawy Drain discharge point (location I and II, respectively) during the summer and winter seasons. The water quality, liver histopathology and DNA alteration of fish was examined. ISSR-PCR technique was used to assess the genetic variation of fish samples from these locations. The water quality parameters ( BOD, COD,……)were increased at location II compared with location I in addition to depletion in dissolved oxygen. Moreover, the fish samples collected from location II showed severe histological and molecular alterations than those collected from location I. It is recommended that the government must increase the awareness of people around the River Nile, and improve the environmental management to reduce the risks of polluted water and consuming the fish exposed to this water on human health.}, keywords = {River Nile,Rosetta Branch,water quality,Heavy metals,Orechromus niloticus,Inter-simple sequence repeats (ISSR)}, url = {https://ejabf.journals.ekb.eg/article_78272.html}, eprint = {https://ejabf.journals.ekb.eg/article_78272_b4abf5653e8e4b6dae1ec01ad812165e.pdf} } @article { author = {A. Abdelnaby, Faiza}, title = {On some Nereididae (Polychaeta) with new records for the Egyptian waters}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {47-68}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.85043}, abstract = {In the present study 18 Nereididae species have been recorded, belonging to 8 genera, in fouling samples taken during 2015 from Suez Canal, and during 2010 from Hurghada (Red Sea), and in sediment samples collected from the Suez Gulf in 2018, from Port Said, Rashid, from Damietta and Marina in 2013, and from El Dabaa in 2017. Nine of the collected species were previously recorded as alien, by contrast, 6 are considered newly recorded species for Egyptian waters: Pseudonereis  variegata and Nereis jacksoni are viewed as new to the Suez Canal and the Suez Gulf. Ceratonereis (Composetia) hircinicola and Leonnates decipiens are recorded from the Suez Gulf and the Egyptian Mediterranean coast, so they are considered exotic organisms introduced to the Mediterranean by ship or ballast water. Also, Ceratonereis mirabilis and Leonnates indicus are considered a new records for Egyptian Mediterranean waters. Notes of description included, likewise photographs of each species. This study is another endeavor to add new records of Nereididae species in the Egyptian waters, recorded for the first time, which enriches our knowledge of this family and is considered an addition to the list of polychaetes in Egypt.}, keywords = {Polychaeta,Nereididae,Suez Canal,Suez Gulf,Red Sea,Mediterranean coast}, url = {https://ejabf.journals.ekb.eg/article_85043.html}, eprint = {https://ejabf.journals.ekb.eg/article_85043_07377f353f1c8fc9676a74ba8ccc1871.pdf} } @article { author = {A. Abo-Taleb, Hamdy and F. Zeina, Amr and Ashour, Mohamed and M. Mabrouk, Mohamed and E. Sallam, Ahmed and M. M. El-feky, Mohamed}, title = {Isolation and cultivation of the freshwater amphipod Gammarus pulex (Linnaeus, 1758), with an evaluation of its chemical and nutritional content}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {69-82}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.78232}, abstract = {In recent years, global aquaculture has increased significantly, and therefore the demand for animal protein used to feed farmed fish has increased, this has led to the search for other sources of animal protein instead of fish meal. Amphipods as Gammarus are among those possible alternatives due to its abundant productivity and appropriate nutritional content, as the current study showed that its protein content was 40%, carbohydrates 27.4%, fat 5.5%, and it also contained antioxidants such as tannic acid (223.146 mg/100g) and β-carotene (21602.964 IU/100g) in addition to many essential vitamins in considerable values such as Vitamin B2 338.3842 mg/100g, Vitamin B6 (635.616 mg/100g), Vitamin B12 (419.5017 mg/100g), Vitamin A (19623.98 IU/100g), Vitamin E (177.958 mg/100g), Vitamin D (59.672 mg/100g), and Folic Acid (521.185 µg/100g). Gammarus pulex has been isolated from the natural resource (Lake Mariout), and after 90 days of rearing in tanks (initial stock: 30 individuals/liter) supplied with four different types of nests: pored wood pieces, balls of palm fibers, balls of palm leaves, and balls of nylon net "Haba net", one type for each tank. The obtained data revealed that balls of palm leaves are the best nest for rearing as it gave the highest yields (127 individuals/liter), the average obtained numbers of the different rearing tanks was 108 individuals/liter with average wet weight 2.16g/l, which means 1m3 water can produce approximately 2160g of Gammarus. A new nutritional formula was used in the current study to feed the cultivated Gammarus in its various stages, which gave good results that were reflected in its productivity and the analysis of its chemical components.}, keywords = {Gammarus pulex Cultivation Nutritional components,Fish-farms,Nests}, url = {https://ejabf.journals.ekb.eg/article_78232.html}, eprint = {https://ejabf.journals.ekb.eg/article_78232_0fb516a3c034c3b0953b18d16ae422b7.pdf} } @article { author = {H. Kh. Akel, El Sayed}, title = {Fisheries status of the trawlers bycatch from Alexandria, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {83-106}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.78754}, abstract = {        The aim of this study  is to investigate the by catch from the Egyptian Mediterranean trawlers off Alexandria during the period from March 2018 and May 2019. The catch per unit effort (CPU) ranged from 4 Kg / hr in autumn to 9 Kg / hr in summer. Invasive species reached 44 in number; 43 species of Red Sea origin and one species of Atlantic Ocean origin.  The by catch was represented by one elasmobranch, 80 boney fishes and 14 invertebrates belonging to 4 phyla; 5 classes; 22 orders and 56 families. Eight families of fish were dominated and constituted the high rank of percentage during the period of investigation. 12 species were prevailing the by catch and constituted the high percentages namely: Spicara smaris (22.575%); Boops boops (12.922 %); Nemipterus randalli (8.943 %); Spicara maena (4.865 %); Synchiropus sechellensis (4.864 %); Diplodus vulgaris (4.504 %); Lepidotrigla cavillone (3. 313 %); Upeneus pori (3.225 %); Pagellus erythrinus (3.192 %); Mullus barbatus (1.804 %); Terapon puta (1.235 %) and Ariosoma balearicum (1.038 %).  Nine species occurred during the four seasons; 18 species were represented during three seasons; 17 species occurred in two seasons, while forty-nine species were represented in one season. The biological studies on the most economical by-catch species showed there were three species belonged to one year of life, eight species had two years of life and one species was found belonging to age group three.}, keywords = {Mediterranean Sea,trawlers by- catch,invasive species,species composition,catch composition}, url = {https://ejabf.journals.ekb.eg/article_78754.html}, eprint = {https://ejabf.journals.ekb.eg/article_78754_4502fa32fea3bff63e7adc25eb58f651.pdf} } @article { author = {Minh Dinh, Quang and Nha Nguyen, Y Thi and Hoa Dang, Thao and Sy Tran, Nam and Thi Huyen Lam, Tran}, title = {The impact of human activities on the biodiversity of fish species composition in rice paddy field in An Giang Province, Southern Vietnam}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {107-120}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.78889}, abstract = {This study aims to measure the impact of human activities on the biodiversity of fish in three sampled areas of the An Giang province of Southern Vietnam. The fish samples were gathered between August 2018 and July 2019 by collecting fish at 6 sampling sites of the regions. Using various trapping mechanisms, the V-shaped net, plastic and bamboo fish traps was applied during rice collection periods. The result found that the biodiversity indexes of the regions were 1.321, 0.078, and 7.579 for Shannon-Weaver’s diversity, Simpson’s dominance, and Margalef’s abundance respectively. These biodiversity indexes suggested the fish assemblage inside the dike both islets and riverine regions to be lower than that of the outside sampled areas due to both the natural factors (tides and precipitation) and artificial factors (intensive farming, demand of crops, uses of agricultural chemicals and flood prevention dike system). It transforms the different dominant fish species where the new species of ichthyofauna in An Giang, Vietnam can be the potential for rice-fish farming in the near future.}, keywords = {An Giang,biodiversity,dike,fish composition,rice crops}, url = {https://ejabf.journals.ekb.eg/article_78889.html}, eprint = {https://ejabf.journals.ekb.eg/article_78889_43d2b495ed2546b36b52e684b7baf20e.pdf} } @article { author = {A. Othman, Amal}, title = {Nitrogen-Fixing Bacteria and change of the macrophyte vegetations in Bardawil Lagoon, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {121-133}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.79182}, abstract = {Bardawil is a coastal lake/lagoon that stretches across most of the Mediterranean coastline of Egypt’s Sinai Peninsula. The surrounding area is known as the eastern gate to Egypt, and has a long history of being a bridge between Africa and Asia. The lake’s length is 76.37 km (extending from (31°03`N to 31°14`N, and 32°40`E to 33°30`E) and has a maximum width of 16.65 km, occupying a total surface of 518.99 km2. Before 2011 the basic dominants flora in the lagoon were Ruppia cirrhosa and Cymodocea nodosa.  In 2011, Halophila stipulacea became the most prominent species in the lake The aim of this study was to determine changes in the bacterial population of aquatic macrophytes, sediment and water samples of Bardawila lake and changes in the macro-vegetation and their possible reasons. For bacteriological analyses Samples of water, sediments and two seagrass roots were collected from two sectors of Lake Bardawil, Sector I at the eastern side with plant cover of Halophila stipulacea and Sector II at the water- circulated area in the northern middle and with plant cover of Cymodocea nodosa. Total bacteria and total diazotrophs were present in high densities in all samples. ANOVA analysis indicated significant differences attributed to the environmental niches.  Halophila stipulacea roots support higher populations of diazotrophs (up to 1010 cfu g-1).           This study demonstrates that diazotrophs are not randomly distributed in the lake and are either distributed by the host plant or adapted to different environmental niches. The reduction in the distribution of Cymodocea nodosa is a result of competitive displacement by Halophila stipulacea}, keywords = {Diazotrophs bacteria,Flora,Seagrass,Bardawil Lagoon,North Sinai,Egypt}, url = {https://ejabf.journals.ekb.eg/article_79182.html}, eprint = {https://ejabf.journals.ekb.eg/article_79182_437eb89c18c6b9f88062c4cd9f0bb178.pdf} } @article { author = {A. Saber, Mahmoud and G. A. Gewida, Ahmed}, title = {The influence of trammel net fishing on the Rabbit fish (Siganus rivulatus) stocks in Suez Gulf, Red Sea, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {135-145}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.79142}, abstract = {Trammel nets are commonly used to sample the Rabbit fish (Siganus rivulatus) in Suez Gulf, Red Sea, Egypt. The present work was carried out to study the effect of trammel net fishing on Rabbit fish (Siganus rivulatus) stocks in Suez Gulf. The total 566 individuals of S. Revulatus were sampled by trammel net during October 2018, January 2019 and September 2019. The total length and total weight (TL&TW) relationship equation was obtained to be W = 0.0124 L 3.0097, and total length with total girth (TL&TG) relationship equation was assessed to be G = 0.587L+1.026. The life span was estimated as 3 years. The total, natural and fishing mortality coefficients were 1.76, 0.6 and 1.16/year, respectively. The exploitation rate was estimated as 0.66. The parameters of probability of capture ensured that (25%, 50 % and 75% of fish escaped by trammel net were estimated to be L50= 15.59 cm while L25 = 14.79 cm and L75 = 16.42 cm. The results of the present study revealed that there is a marked effect of fishing on the Rabbit fish (Siganus rivulatus) stock in the Gulf of Suez, It is suggested that reducing the number of fishing trips and changing the gear characteristics (mesh size) to catch larger fish to maintain the stock productivity and its sustainability.}, keywords = {Trammel nets,Rabbit fish Mesh size,Siganus rivulatus,Gulf of Suez Red Sea}, url = {https://ejabf.journals.ekb.eg/article_79142.html}, eprint = {https://ejabf.journals.ekb.eg/article_79142_2506d0e461ffbafc3303a41658e8b6fa.pdf} } @article { author = {Ayoub, Magda and Abdel-Motleb, Asmaa and Tadros, Menerva}, title = {First Egyptian record of the eye fluke (Philophthalamus palpebrarum) transmitted by Melanoides tuberculata snail and its experimental life cycle}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {147-162}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.79332}, abstract = {The present study has been recorded, for the first time, cercariae of  Philophthalamus palpebrarum (Trematoda: Philophthalmidae occurring in the birds-eye) emerged from naturally infected Melanoides tuberculata snails collected from  Giza Governorate, Egypt, and succeeded to complete its life cycle experimentally. The adult worm was extracted from the conjunctival sac of the chicken eyes after 35-40 days post experimental infection by pipetting 10-15 excysted metacercariae into each eye orbit of (1-3 days old chicks). The worms were identified as Philophthalamus palpebrarum based on the morphological characteristics and the comparison with the previous descriptions in the literature. They were small, the body length, 5.48 mm (4.6 - 6.1) and its width 1.60 mm (1.32 - 1.9) and the surface of the body is smooth and lacks spination. The morphological characteristics of the developmental stages, from cercariae to adults, of this eye fluke, were described. It can be concluded that this eye fluke was described as Philophathalamus palpebrarum and the Melanoides tuberculata snails emphasized as its intermediate host in natural and experimental infection for the first time in Egypt. From this study, it is recommended to pay more attention to this parasite as a zoonotic disease to avoid the risk factor of this parasite to humans. }, keywords = {Melanoides tuberculata,Philophthalmus palpebrarum,Eyefluke,Life cycle}, url = {https://ejabf.journals.ekb.eg/article_79332.html}, eprint = {https://ejabf.journals.ekb.eg/article_79332_6873d04bebf57113f2f8db5502ae9fdb.pdf} } @article { author = {M. Habashy, Madlen and M. Sharshar, Khadiga}, title = {On some factors affecting molting and growth rate of the giant freshwater prawn, Macrobrachium rosenbergii (De Man, 1879)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {163-175}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.79317}, abstract = {The effect of temperature (20, 25, 30 and 35 ºC), salinity ( 0, 5, 10 and 15 ppt), pH (6, 7, 8 and  9) and light (24h L:00hD, 12hL:12hD and 00hL:24hD) on molting cycle, growth and survival of larvae of the freshwater prawn Macrobrachium rosenbergii were investigated independently under laboratory conditions. Temperature, salinity and pH significantly (P<0.05) influenced the molting, growth and survival of the prawns. The influence of photoperiod was not significant (P>0.05). The best levels of temperature, salinity and pH, which gave the fast molt with the highest growth increment in M. rosenbergii were 30ºC, 5 ppt, and pH 8, respectively. Outside these levels, more molting did not produce more growth. These results have direct implications in the aquaculture production of Macrobrachium rosenbergii and accelerate the growth of prawns in conditions of intensive culturing with a reduction in production costs.}, keywords = {Freshwater prawn Macrobrachium rosenbergii Temperature,Photoperiod,Molting}, url = {https://ejabf.journals.ekb.eg/article_79317.html}, eprint = {https://ejabf.journals.ekb.eg/article_79317_6dccff14662afb943c85912532074162.pdf} } @article { author = {A. Saleh, Hassnaa and M. El- Shahat, Reda}, title = {Accumulation of chromium in Lemna minor under the effect of pH and EDTA variation and assessment of the treatment impact on Nile tilapia (Oreochromis niloticus)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {177-194}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.79348}, abstract = {Water pollution with chromium (Cr+2) is a major threat to the environment and human health. Therefore this study was conducted to evaluate the efficiency of aquatic plant Lemna minor as a natural biological tool in the accumulation of Cr+2 from polluted water under the effect of pH and Ethylene Diamine Tetra Acetic Acid (EDTA) and assess the impact of this treatment on the growth of  Nile tilapia. L. minor fronds were exposed to different concentrations of Cr+2 (0, 2, 4, 6, 8 and 10 mg L-1) with pH (5, 6, 7, 8 and 9) for periods of 5, 10, 15 and 20 days. The highest accumulation of Cr+2 was (9563.81±222.47 μg g-1 dry wt) at 10 mg L-1 with pH 5 after 10 days of treatment. While in the groups that enriched with EDTA (25, 50, 75 and 100 μM) for periods of 5, 10, 15 and 20 days, maximum accumulation of Cr+2 was (9926±235.84 μg g-1 dry wt) at 10 mg L-1 with pH 5 and 25 μM of EDTA after 10 days of treatment. The highest removal efficiency of Cr+2 by L. minor was 99.26 % at 10 mg L-1 with pH 5 and 25 μM of EDTA after 10 days of treatment. This study indicated that pH and EDTA influenced chromium accumulation in L. minor. The impact of the treated water by L. minor on the growth of Nile tilapia indicated that fish muscles had no chromium accumulation and the treated water became acceptable and safe. Meanwhile; a specific growth rate (SGR) was (1.2±0.01 %/day) at the end of exposure period which lasted 30 days the same as control group. So, we can conclude that Nile tilapia played an important role in monitoring chromium in the treated water by L. minor under the effect of pH and EDTA.}, keywords = {Nile tilapia,Oreochromis niloticus,Chromium,Lemna minor,Accumulation,EDTA}, url = {https://ejabf.journals.ekb.eg/article_79348.html}, eprint = {https://ejabf.journals.ekb.eg/article_79348_ee8a706c71f108bc700fb29fd91854a4.pdf} } @article { author = {K. K. Amponsah, Samuel and Asiedu, Berchie and Failler, Pierre}, title = {Population parameters of Oreochromis niloticus (L) from a semi-open lagoon (Sakumo II), Ghana and its implications on management}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {195-207}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.79778}, abstract = {Population parameters of Oreochromis niloticus in the Sakumo II Lagoon, Ghana were investigated using the FiSAT software. Data were collected quarterly from August 2017 to June 2018. The measured total length of 229 specimens ranged from 4.5 to 18.5 centimeters (cm). The growth parameter (K) was estimated as 0.54 year–1 with asymptotic length (L∞ = 19.4 cm). The recruitment pattern was continuous year-round with two peaks. The total (Z), natural (M) and fishing (F) mortalities were 1.83 year–1, 1.50 year–1 and 0.33 year–1 respectively. The exploitation rate (E) was 0.29 and the relative yield/biomass per recruit (Emax) was 0.48. The fishing effort was found to be low, with catches dominated by small size individuals. The study revealed the growth-overfishing, thus, an increase in the mesh diameter should complement reduced fishing effort to preserve the population of the species.}, keywords = {Nile tilapia,Oreochromis niloticus Ghana,Sakumo II Lagoon,Population parameters,Stock assessment}, url = {https://ejabf.journals.ekb.eg/article_79778.html}, eprint = {https://ejabf.journals.ekb.eg/article_79778_5f16796ecd92d0b763c73bd7ce1d4045.pdf} } @article { author = {M. M. El-Khayat, Hanaa and M. Abu Taleb, Hoda and S. Helal, Noha and I. Ghoname, Samah}, title = {Assessment of metallothionein expression in Biomphalaria alexandrina snails and Oreochromis niloticus Fish as a biomarker for water pollution with heavy metals.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {209-223}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.80032}, abstract = {Metallothioneins (MTs) are small cysteine-rich proteins that play important roles in metal homeostasis and protection against heavy metals; therefore, they were used as biomarkers to evaluate metals pollution in the aquatic ecosystem. The present work aims to evaluate the tissue immunohistochemical expression of MT in Biomphalaria alexandrina snails and Oreochromis niloticus fish collected from Lake Manzala in the area of Port-Said, Dakahlia and Damietta governorates in response to the recorded levels of Cd, Cu, and Pb in their aquatic habitats. The levels of the heavy metals; Cd, Cu &Pb in water samples from Port Said were significantly exceeded those of Dakahlia (p<0.01), also, a similar pattern was recorded for Cu levels between Damietta and Dakahlia (p<0.01). Accordingly, the tissue expression of MT was significantly increased in snails and fish specimens from Port Said and Damietta compared to Dakahlia governorate specimens (p<0.01 and p<0.05 respectively). In general; MT immunopositivity in snails regarding the number of MT-positive cases and the number of positive cells, was observed as digestive gland> prostate tubules> ovotestis>  head-foot area and in fish, it was as follows: liver & spleen> gills > ovary. Conclusion: There is a positive correlation between heavy metals levels and MT expression in snails and fish collected from Port Said, Damietta and Dakahlia, El-Manzala Lake (p<0.001& r=0.636, p< 0.001& r=0.375 and p< 0.05& r=0.296, respectively), hence MT could be considered as a good potential biomarker for toxicological studies and for assessment of heavy metal stress in aquatic environment.}, keywords = {Metallothionein,Biomphalaria alexandrina Oreochromis niloticus immunohistochemistry,Heavy metals,Lake Manzala}, url = {https://ejabf.journals.ekb.eg/article_80032.html}, eprint = {https://ejabf.journals.ekb.eg/article_80032_b3ffaa9bcf9b67f1b98afd19b56c36e7.pdf} } @article { author = {M. Abdelrhman, Abdelrhman and Z. Sharawy, Zaki and M. A. S. Goda, Ashraf and J. Slater, Matthew r}, title = {Adaptability of the Nile Tilapia, Oreochromis niloticus Juveniles to Water Salinity by Controlling Dietary Sodium Chloride Levels}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {225-237}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.86056}, abstract = {Increasing groundwater scarcity and salinity pose challenges for high water demand aquaculture. Adapting animals to grow optimally under saline conditions is key to future growth in many important aquaculture regions. In the current study, 10-week controlled feeding experiment was carried out to investigate dietary sodium chloride supplementation (10% NaCl) as a method of mitigating the effects of increasing water salinity (0,10 and 15 ppt) on growth and metabolism of juvenile Nile tilapia, Oreochromis niloticus in controlled feeding experiments. Fish fed diets supplemented with 10% NaCl recorded significantly better weight gain when compared to fish fed control when held in 10  and 15 ppt salinity water over a period of ten weeks. Blood glucose and blood lactate concentrations were both significantly higher in fish fed diets supplemented with 10% NaCl and increased with increasing water salinity. Fish fed diet containing 10% NaCl recorded the highest values of Na+ concentration in blood compared to other experimental groups. Feed utilization, as indicated by feed conversion ratio decreased significantly with water salinity (P < 0.05). Feed intake also decreased with increasing water salinity. The obtained results indicated that salinity is a key factor in controlling the growth of Nile tilapia. Results clearly indicate that negative effects of increased salinity in rearing water can be partially mitigated by salt inclusion in diets.}, keywords = {water salinity,sodium chloride,Growth,feed utilization,Na+ concentration,Nile tilapia}, url = {https://ejabf.journals.ekb.eg/article_86056.html}, eprint = {https://ejabf.journals.ekb.eg/article_86056_8510f1985b5d243f1226c055c5d1daf2.pdf} } @article { author = {Subba, Suren and K. Mahaseth, Vinod and R. Subba, Bharat and R. Bhusal, Daya}, title = {Monthly dynamics of reproductive indices of Neolissochilus hexagonolepis (McClelland, 1839) and their relationship with physico-chemical parameters along the mid-reaches of Tamor River, Nepal}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {239-247}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.80222}, abstract = {Physico-chemical parameters exert influence on the reproductive biology of fish. The present study was carried out from December 2014 to November 2016 to investigate the effect of physico-chemical parameters on the reproductive indices like gonad weight and GSI of either sex of N. hexagonolepis in the mid-reaches of Tamor River. Altogether 198 fishes were sampled during the study period. The mean total body weight (TW) and mean total length (TL) of male fishes were 171.67 ± 186.78 gm and 21.21 ± 6.38 cm, respectively. Similarly, the mean TW and mean TL of female fishes were 349.23 ± 316.82 gm and 27.86 ± 9.21 cm, respectively. The trend of monthly mean GSI of both male and female sex in the present study hinted that N. hexagonolepis spawns during monsoon season with peak activity in July to August. A single well-defined peak of GSI for both male and female fish indicated that N. hexagonolepis is an annual breeder. NMDS (Non-matrix multidimensional scaling) of the physico-chemical parameters and reproductive indices of N. hexagonolepis revealed that the atmospheric temperature and water temperature exert a significantly positive influence on the gonad weight and GSI of either sex of N. hexagonolepis while the other environmental variables pH, DO, free CO2, TA and TH exert negative influences upon the reproductive indices of the fish.}, keywords = {Neolissochilus hexagonolepis,Tamor River Nepal Gonad weight,Gonado-somatic index}, url = {https://ejabf.journals.ekb.eg/article_80222.html}, eprint = {https://ejabf.journals.ekb.eg/article_80222_c5952a4be891b904ec1f2c672d1b6f61.pdf} } @article { author = {Bensafia, Nabila and Djabourabi, Aicha and Touati, Hassen and Rachedi, Mounira and Belhaoues, Saber}, title = {Evolution of physicochemical parameters and trophic state of three Park National of El-Kala water bodies (North-east Algeria)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {249-263}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.80312}, abstract = {The Park National of El-Kala wetland complex is very varied ecosystems; classified as a world protected sites through a renowned international wetland complex. This work was conducted in Northeastern Algeria to study the physicochemical parameters and to determine trophic levels in three water bodies of the Park National of El-Kala wetland complex from January to December 2017. The relationships between phytoplankton density, the main environmental parameters (temperature, salinity, nutrients) and characterization of trophic status based on the references of the Chlorophyll levels were investigated. The monthly fluctuations of the physicochemical parameters of the water showed variations following the seasonal rhythm and are strongly dependent on abiotic factors in the region. The results of the statistical analysis revealed significant correlations between phytoplankton densities and nutrient concentrations and also Chlorophyll concentration. In conclusion, it was found hyper eutrophication status during the summer period as well as the autumnal period in all studied sites [Chla] > 25 µg/l. By contrast, Mellah lagoon is mesotrophic in winter ([Chla] =7.69 µg/l).}, keywords = {Environmental parameters Eutrophication,phytoplankton,Chlorophyll a,Wetland complex,North-east Algeria}, url = {https://ejabf.journals.ekb.eg/article_80312.html}, eprint = {https://ejabf.journals.ekb.eg/article_80312_71e9c129c8eff51ff95974ee20a9ac0d.pdf} } @article { author = {A. Shetaia, Said and M. Abu Khatita, Atef and A. Abdelhafez, Nabil and M. Shaker, Ibrahim and B. El Kafrawy, Sameh}, title = {Evaluation of Potential Health Risk, Heavy Metal Pollution Indices and Water Quality of Edku Lagoon- Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {265-290}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.80718}, abstract = {Edku lagoon is one of the important aquaculture sectors in the Nile Delta of Egypt. Recently, the lagoon has become a sink of discharge wastewater from different anthropogenic sources. The present work aims to study physicochemical parameters, level of nutrients and heavy metal concentrations in water of the lagoon to assess the water quality and identify the potential pollution source(s). Water quality index (WQI), eutrophication index and multiple heavy metal pollution indices (HPI, HEI, PI and Cd) in addition to evaluation of human health risk (HQdermal) model were applied. The obtained data revealed that physicochemical parameter varied between 7.62 - 8.90 for pH, 1.2 – 12.2 g/l for salinity, 3.5 – 12.5 mg/l for dissolved oxygen, 1.3 – 1.9 mg/l for ammonia, 0.065 – 0.191 mg/l for nitrite, 0.217 – 0.915 mg/l nitrate, 0.198 – 0.527 mg/l for orthophosphate, and 51.32 – 102.7 μg/l for chlorophyll-a. The average concentrations of heavy metals were 0.439, 0.322, 0.290,      0.328,     0.059,     0.040, 0.00005 ppm for Fe, Mn, Zn, Cu, Pb, Cd and Hg, respectively. Based on WQI, the lagoon was classified as bad water, while EI result varied between eutrophic to mesotrophic.  The pollution indices revealed to lagoon water is highly contaminated based on HPI, HEI and Cd and varied between slightly affected to seriously affected by heavy metals according to PI. Human health risk showed that, HQdermal for all metals except Cd lower than the unity.}, keywords = {Edku lagoon,Heavy metals,Pollution indices,Water quality index,Health risk assessment}, url = {https://ejabf.journals.ekb.eg/article_80718.html}, eprint = {https://ejabf.journals.ekb.eg/article_80718_a8e6230959c512c3d55bfb104f26ce62.pdf} } @article { author = {M. Ibrahim, Amina and I. Ghoname, Samah and M. Mansour, Shereen and M. El- Dafrawy, Shadia}, title = {Effect of some medicinal plant extracts as molluscicidal and apoptotic agents on Biomphalaria alexandrina snails}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {291-300}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.80284}, abstract = {Schistosomiasis is one of the neglected tropical diseases (NTDs). The freshwater snails Biomphalaria alexandrina are the intermediate host of Schistosoma mansoni in Egypt. Controlling these snails by medicinal plants is a promising way as it is an eco-friendly strategy. The objective of this study is, to evaluate the molluscicidal activity of ethanolic extracts of three medicinal plants Ziziphus spina christi, Moringa oleifera, Tecoma stans and their effects on the chromosomes and apoptotic changes of B. alexandrina snails in control and exposed snails. Results showed that ethanolic extracts had a molluscicidal activity on B. alexandrina, where LC50 of Z. spina christi, M. oleifera, and T. stans were 108.7, 209.4 and 256 mg/L respectively. The meiotic stages were detected in the normal control group, the first meiotic division begins with long prophase (chromatin network), which is subdivided into four stages; leptotene, zygotene, pachytene, and diplotene. After exposure of each plant extract, there were some alterations in the zygotene stage, which was different in all exposed snails and induced apoptotic changes was observed. Notably, Z. spina christi had a more condensed zygotene stage than the other two plants and significantly increased the percentage of apoptosis than the control group.}, keywords = {Biomphalaria alexandrina,Schistosomiasis,Chromosomes,Ziziphus spina christi,Moringa oleifera,Tecoma stans}, url = {https://ejabf.journals.ekb.eg/article_80284.html}, eprint = {https://ejabf.journals.ekb.eg/article_80284_e73457dd7e2bd351962d3808e0cae05f.pdf} } @article { author = {P. Omobepade, Bayode and M. Akinsorotan, Ademola and O. Ajibare, Adefemi and M. Ogunbusola, Eunice and O. Ariyomo, Tolulope and O. Jimoh, Jeremiah and M. Odeyemi, Kemisola and S. Okeke, Onyinye and A. Falabake, Michael and M. Adeniji, Segun and M. Adedapo, Akinola}, title = {Heavy Metal Concentration in White Shrimp Nematopalaemon hastatus and their Associated Ecological and Health Risk in the Nigerian Continental Shelf}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {301-316}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.87815}, abstract = {Attaining shrimp safety and quality management in developing countries entails the assessment of parameters that determines their level for consumption. Hence, the heavy metal concentration in white shrimp (Nematopalaemon hastatus) collected along the supply in the continental shelf of Nigeria and their associated health and ecological risk were evaluated using standard methods. Results indicated that Zinc was the highest (19.38mgkg-1, 56.57mgkg-1 and 56.64mgkg-1) heavy metal in the samples collected at landing, processing and marketing segments of the supply chain respectively. The study further indicated that the health quotient and ecological risk index for all the heavy metals evaluated in the N. hastatus had values that were less than one (1). This implies that the entire population would not experience the hazard of heavy metal (Cd, Cu, Fe, Pb, Ni, Mn, and Zn) in later life due to the consumption of N. hastatus. It equally indicated that the shrimp posed no ecological risk in the Nigerian continental shelf. Hence, the entire human population who consumes/utilize N. hastatus can continually depend on the supply of safe N. hastatus from the Nigerian continental shelf. The study recommends increased utilization of white shrimp in value-added food products to sustain/attain healthy living and promotion of well-being in Nigeria and in other developing nations.}, keywords = {heavy metal,health quotient,ecological risk index,white shrimp,Supply Chain}, url = {https://ejabf.journals.ekb.eg/article_87815.html}, eprint = {https://ejabf.journals.ekb.eg/article_87815_7f17e7d92bb27546fce699743e998ca5.pdf} } @article { author = {A. Abdelnaby, Faiza}, title = {First record of Sternaspis scutata (Polychaeta, Sternaspidae) in Egyptian waters}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {317-326}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.85232}, abstract = {The present study deals with the first record of Sternaspis scutata (Ranzani, 1817); three specimens were obtained, one was located inside the samples, in 2018, at shallow depths, by trawling net of fishing activity in front of Port Said. The other two specimens were collected from Suez Gulf (Gabal El Zeit region 2017) using benthic samples. The abbreviated description provided with photos, distribution, and habitat also with taxonomic comments. Compared with S. thalassemoides Otto, 1821, the first synonyms of Sternaspis scutata.  For images and detection, stereo zoom microscope (Optika SZM-2 model) and research microscope were used with a digital camera.}, keywords = {Annelida,Polychaeta,Sternaspidae,Sternaspis scutata,Port Said,Suez Gulf}, url = {https://ejabf.journals.ekb.eg/article_85232.html}, eprint = {https://ejabf.journals.ekb.eg/article_85232_d1ef3fe52d82c9d84092cc4cddbc47e9.pdf} } @article { author = {M. Hussein, Nermean and M.A. Khalifa, Refaat and T.M. Abdel-Ghaffar, Zeinab and A. Hussein, Abdel-Nasser}, title = {Redescription and a new host record of Cucullanus cirratus Müller, 1777 from the Red Sea fish Mulloidichthys flavolineatus (Perciformes: Mullidae) in Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {327-341}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.80899}, abstract = {     Based on light and scanning electron microscopy, a Cucullanus species (Nematoda: Cucullanidae Railliet and Henry, 1915) was isolated from the intestine of the commercially important marine fish Mulloidichthys flavolineatus (Perciformes: Mullidae) from Hurghada, Egypt, as a new host and locality record. Cucullanus cirratus Müller, 1777 is primarily characterized by the dorsoventral oral opening, surrounded by narrow membranous alae (collarette) supported by a row of numerous minute teeth, four submedian cephalic papillae, a pair of small lateral amphids, and a funnel-shaped pseudobuccal capsule. The excretory pore is located at the level of the posterior half of the esophagus between the nerve ring and the intestine. The intestine is simple and without cecum. Males show unequal caudal spicules, with the left spicule measuring 1.20–1.41 mm and the right spicule measuring 0.644–0.736 mm. There are 10 pairs of caudal papillae, including five preclocal and five postclocal pairs as well as a pair of small phasmids. The tail is simple and conical in both sexes.}, keywords = {Red Sea fish,Perciformes,Nematodes,Cucullanus cirratus,SEM}, url = {https://ejabf.journals.ekb.eg/article_80899.html}, eprint = {https://ejabf.journals.ekb.eg/article_80899_c3feef62c5f267546a87d4b2fd90c9f7.pdf} } @article { author = {A. A. Osman, Yassein and F. Mehanna, Sahar and M. El-Mahdy, Samia and S. Mohammad, Ashraf and Mahe, Kelig}, title = {Age precision and growth rate of Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red Sea, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {342-352}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.82016}, abstract = {The age and growth of the haffara seabream, Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red sea, Egypt, were investigated using a sample of 466 specimens. The fish length varied between 12.7 and 27.2 cm and the weight from 38.1 to 293.2 g. Samples were collected from the artisanal fisheries during the fishing season from August 2018 to July 2019. The relationship between the body lengths (total, fork and standard length in cm) and the body weight (g) was found to be significant (p < 0.05). The relationship between the body length and weight regarding the sex effect was insignificant for all samples (log W- log TL, ANCOVA, p > 0.05). The relationship between length and weight was estimated by a power regression function, with a scaling factor at a = 0.0106 for both females and males and 0.0107 for the combined sexes, the exponent b = 3.13, 3.13 and 3.129 for females, males and for all samples, respectively. Age was determined using the whole otolith and the maximum age of haffara was 5 years old for females and males. The otolith readings indicated good agreement between the two readers with an agreement = 88.35%, CV = 3.93% and APE = 2.78%. The von Bertalanffy growth parameters were estimated at TL∞ = 30.13 cm, k = 0.35 y–1, and t0 = –0.24 y for females, TL∞ = 30.49 cm, k = 0.36 y–1, and t0 = –0.26 y for males, TL∞ = 30,47 cm, k = 0.36 y–1, and t0 = –0.26 y for the combined sexes.  }, keywords = {Age precision,Growth,Rhabdosargus haffara,Hurghada,Red Sea,Egypt stock assessment}, url = {https://ejabf.journals.ekb.eg/article_82016.html}, eprint = {https://ejabf.journals.ekb.eg/article_82016_2dcbe3071fedf85e5e0de31e812d9b64.pdf} } @article { author = {Awas, Mohd and Ahmed, Imtiaz and A. Sheikh, Zubair}, title = {Length- weight relationship of six coldwater food fish species of River Poonch, Pir Panjal Himalaya, India.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {353-359}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.82230}, abstract = {Length-weight relationships are of great importance in fishery assessment studies since it provides vital information about the growth of fishes, reproductive biology and general well-being of fish in their respective habitats. In the present investigation a total of 158 specimens of Schizothorax richardsonii (N=30), Garra gotyla (N=28), Botia biridi (N=25), Crossocheilus diplocheilus (N=25), Mastacembelus armatus (N=24) and Tor putitora (N=26) were collected during June, 2017 to October 2018 from different sites of the River Poonch of Pir Panjal Himalayan region, with the help of local trained fishermen by using cast and gill nets.  The results revealed that positive allometric growth (b>3) for S. richardsonii, C. diplocheilus and M. armatus, while negative allometric growth (b<3) were noted in G. gotyla, B. biridi and T. putitora. The ‘a’ values of all the fish species were reported in the range from 0.001 to 0.410 and the coefficient of variation (r2) was noted in the range from 0.87-0.98. The data generated in the present study would be useful in determining the health status of these fish species as well as for their better management and conservation.}, keywords = {Length- weight relationship,Poonch river,Himalaya India}, url = {https://ejabf.journals.ekb.eg/article_82230.html}, eprint = {https://ejabf.journals.ekb.eg/article_82230_cef338f703ce5b64b937e3e7a89dc5f0.pdf} } @article { author = {E. Abd Elnabi, Heba and D. I. Hassanen, Gaber and A. Soltan, Magdy and A. Dokdok, Ghadeer}, title = {Effect of Protease and Prebiotic mixtures with Free Fishmeal Diets on Physiological Responses and Histological Examinations of the Red Tilapia, Oreochromis sp.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {361-378}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.82015}, abstract = {The present study was designed to investigate the dietary effects of protease and prebiotic mixtures with free fishmeal diets on red tilapia (Oreochromis sp.). One hundred and fifty fish weighing 7.40±0.05g were randomly divided into four experimental treatments in 3 replicates. Four experimental diets were designed containing different inclusion levels of protease as 0%, 0.10%, 0.15%, and 0.20% named T1, T2, T3, and T4, respectively beside control with prebiotic mixtures was 2 g kg-1. All fish were fed 3% of the body weight daily for 84 days. Liver and visceral weights were measured to determine relative gut length, hepatosomatic index (HSI) and viscerosomatic index (VSI) indices. HSI and VSIwere higher in the groups fed with protease with free fishmeal diets compared to the control group especially in T4 and T3, respectively. The results showed a significant increase in ALT, AST, ALP, TG and TP in T3 and T4 groups compared to the control group. In addition, significant enhancement was observed in T4 of villi numbers, goblet cell numbers and villi width. Furthermore, the control group showed the highest villi length but the higher muscular layer thickness was recorded for T2 group. By intestinal investigation, the results show an improvement of T2, T3 and T4 groups but T1 group has villi shortening and broadening. The results of liver histology show an improvement of T3 and T4 and mild improvement with moderate inflammation in some tissues in T1 and T2 groups. The results of spleen histology show an improvement of T2, T3 and T4 groups with some congestion in some tissues but T1 group has a hemorrhage and some congestion in some tissues. In conclusion, the increasing protease level with prebiotic mixtures can effectively improve the physiological status and health of red tilapia (Oreochromis sp.).}, keywords = {Red Tilapia,Histological examination,physiological responses,Protease,Prebiotic mixture}, url = {https://ejabf.journals.ekb.eg/article_82015.html}, eprint = {https://ejabf.journals.ekb.eg/article_82015_8473ff34a661976522029b14d094a465.pdf} } @article { author = {Z. Arafa, Salwa and S. Abd El-Atti, Mahmoud and M. Elraey, Said}, title = {Fine tegumental structures of the bothriocephalidean cestode, Oncodiscus sauridae, an intestinal parasite of the lizardfish Saurida undosquamis in Suez Gulf, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {379-393}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.82261}, abstract = {The present study showed that some lizardfishes collected from the Suez Gulf were infected with the intestinal cestode Oncodiscus sauridae. Ultrastructural examinations of O. sauridae mature proglottids revealed ten characteristic types of microtriches dressing the external surface of tegument (acicular, papilliform, spiniform, capiform, digitiform, columnar, lingual, tusk- shaped, vial- shaped and thorn-shaped).The syntegument is stacked on a thin basal lamina and inhabited with light membrane-bounded vesicles, dense bodies lacking a limiting membrane, ovoid mitochondria and convoluted secretory ducts ended with rounded reservoirs. Delicate cytoplasmic bridges and thin fibrous layer anchored the syntegument with underlying perikarya. The muscular network was arranged down syntegument in four (circular, longitudinal, ventral and diagonal) distinct orientations. Flame cells were connected with internal cytoplasmic ribs, their luminal cilia (about 100) were confirmed by many elongated rootlets and their excretory ducts were lined with enormous microvilli. Diverse mesenchymal cells (myocytons, tegumental, perikaryal, glandular and calcareous) embedded in the parenchymal were precisely described.}, keywords = {tegument,Oncodiscus sauridae,Saurida undosquamis,Suez Gulf}, url = {https://ejabf.journals.ekb.eg/article_82261.html}, eprint = {https://ejabf.journals.ekb.eg/article_82261_09000dd78d07108e238cc261b7062a8d.pdf} } @article { author = {M. Abugrara, Ali}, title = {Effects of nitrogen starvation on protein and carbohydrate contents of some marine microalgae and their efficiency as food for the rotifer Brachionus plicatilis (Müller)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {395-403}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.84489}, abstract = {The utilization of microalgae biomass shows vast invaluable uses, in the biotechnology of aquaculture, and food science. However, microalgae exhibit swing in their chemical components created mainly by the culture of different conditions. This study considers the impact of nitrogen starvation on protein and carbohydrate of Nannochloropsis salina, Nannochloropsis oculata, Chlorella salina and Tetraselmis chuii, and the sub­sequent effects of the previously mentioned microalgae on the fatty acid composition (FA) of the rotifer Brachionus plicatilis. Cultivation of microalgae was cultured with F/2 enriched seawater medium (control) and without nitrogen (N starved) in 8-day (exponential growth phase). The result indicated that N. salina is the best algal species, and have higher protein contents (41.88 ± 1.40 µg/ml) cultured on N starved media against control, followed by T. chuii, otherwise, T. chuii have higher carbohydrate contents. The lipid classes and FA composition of B. plicatilis showed higher concentrations (450.63 μg.g-1) with N. salina cultured on N starved media, in parallel, total (n-3) PUFA were recorded (57.19 μg.g-1), while, total (n-6) PUFA amounted (23.74 μg.g-1). On the other hand, DHA/EPA ratio was higher when rotifers were fed on T. chuii. The results confirmed that N. salina was the excellent producing protein which significantly could be used as a fish feed product. Moreover, the proximate analysis of rotifers was influenced by the type of microalgae they utilized.}, keywords = {Marine microalgae,protein,carbohydrate,Brachionus plicatilis,fatty acids}, url = {https://ejabf.journals.ekb.eg/article_84489.html}, eprint = {https://ejabf.journals.ekb.eg/article_84489_2ccfc610122d554a09c0885e9e2d2b96.pdf} } @article { author = {Awadh, Hesham and Aksissou, Mustapha}, title = {Length-weight relationship of Deep-water Rose shrimp, Parapenaeus longirostris (Lucas, 1846) in the Western Moroccan Mediterranean}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {405-416}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.85921}, abstract = {Rose shrimp Parapenaeus longirostris(Lucas, 1846),  is one of the main target species of the trawl fleet working  in the western Moroccan Mediterranean ,and an important species of crustacean landings in M'diq port . Despite that, studies on biological characteristics of shrimp in this region are scarce. Hence, this study was aimed to evaluate the length-weight relationships of P. longirostris. Specimens were collected from the coastal trawlers in a monthly sampling over a period of twelve month between April 2017 and April 2018  at M’diq port,  western Moroccan Mediterranean, and the length-weight relationship of the shrimp was estimated using linear regression. Results from the present study indicate that the equations of total length TL, carapace length CL, and weight were expressed for females, males, and pooled sexes.  The length-weight relationship was determined as W = 0,0000119 × TL2,834,   r2=0.932 for total length, and W = 0,00340 × Lc2,312 , r2 = 0.978 for carapace length for pooled sexes. The length-weight relationship showed a negative allometric growth pattern, and the growth exponent (b) ranged from 2.296 to 2.834. The regression coefficient of females, males, and pooled sex were significantly different from isometric growth at P < 0.05.}, keywords = {Parapenaeus longirostris,Length–weight relationships,relative growth,Moroccan Mediterranean}, url = {https://ejabf.journals.ekb.eg/article_85921.html}, eprint = {https://ejabf.journals.ekb.eg/article_85921_42deda8b2514e912c0972537ae7e151f.pdf} } @article { author = {T. Abo-Hashesh, Amira and F. Madkour, Fedekar and S. Sallam, Wafaa and M. Hanora, Amro and K. Ashour, Hanaa}, title = {Phylogenetic analysis and identification of Charybdis natator (Herbst, 1794) from the Egyptian Coast of the Red Sea}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {417-426}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.82439}, abstract = {Charybdis natator is a portunid edible crab that is found in the Indo-Pacific, Indian Ocean, East Africa, and the Red Sea. The present study aimed to confirm the molecular identification of C. natator from the Red Sea using the DNA barcoding gene Cytochrome Oxidase Subunit I (COI). The molecular analysis was performed using genomic isolation from C. natator tissues followed by polymerase chain reaction (PCR) for the COI gene and sequencing. Data analysis was carried out using the Basic Local Alignment Search Tool (BLAST) and phylogenetic analysis conducted using the MEGA 6 program. The molecular identification of C. natator was confirmed and agreed with the morphological description. The phylogenetic analysis of genus Charybdis revealed that C. variegata (KJ168053 and KX018513) should be redefined as C. natator. The study supports promoting Goniosupradens to the generic level and negates its old morphological classification as a subgenus. It also suggests the re-evaluation of C. acuta taxonomical classification and emphasizes the significance of performing further molecular studies on other Charybdis species in order to resolve the misidentification and controversies.}, keywords = {Charybdis natator,Crab,COI gene,Phylogenetic analysis,Red Sea}, url = {https://ejabf.journals.ekb.eg/article_82439.html}, eprint = {https://ejabf.journals.ekb.eg/article_82439_3fb20ed3e4cb1b60ec8480d35cf679a8.pdf} } @article { author = {Andriyono, Sapto and Suciyono, Suciyono}, title = {Molecular Identification and Phylogenetic Tree Reconstruction of Marine Fish from the Essential Wetland Area of Banyuwangi, Indonesia}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {427-439}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.87032}, abstract = {Pangpang Bay is necessary to get serious attention because it is one of the essential wetlands in Banyuwangi, Indonesia. This area able to generate income for traditional fishers and ecological supports the surrounding area because it is possible to be a spawning area and nursery ground for many estuary fish. The identification of fisheries resources is carried out using a molecular approach in the Cytochrome oxidase subunit I (COI) region that is commonly used in barcoding. Identification with this method is expected to minimize errors in determining the name of the species of species that exist in Pangpang Bay. Based on molecular identification information in the COI region, 37 marine fish species were distributed in 25 families, and 4 orders. The results of this study are the initials of molecular information on fisheries resources in the Pangpang Bay area.}, keywords = {Molecular identification,marine fish,Banyuwangi,Pangpang Bay,Indonesia}, url = {https://ejabf.journals.ekb.eg/article_87032.html}, eprint = {https://ejabf.journals.ekb.eg/article_87032_caded9fd8694f91b4a04c9cdf9357ebd.pdf} } @article { author = {Mavraganis, Theodoros and Constantina, Choremi and Kolygas, Markos and Vidalis, Kosmas and Nathanailides, Cosmas}, title = {Environmental issues of Aquaculture development}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {441-450}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.85857}, abstract = {This article is addressing the issue of aquaculture generated pollution and the need to monitor and control this problem at the international level. The rapid global expansion of intensive aquaculture production creates conditions in which farmed fish can be constantly exposed to pathogens and the use of chemicals such as antibiotics, antifoulants, and disinfectants are regularly required. The global aquaculture growth and intensification of the production method were accompanied by the increased use of therapeutics and antibiotics which as in other agricultural sectors were embraced as the effective way of treating diseases and controlling pathogens and consequently some of the chemicals used in Aquaculture are extremely valuable and required for the welfare and the economic viability of the sector. Antifoulants and disinfectants can be released in the aquatic ecosystem. These chemicals are under scrutiny and some are banned for use in European countries.  Depending on the methods of administering antibiotics and therapeutics as well as their elimination from the body, these compounds have played a role in the environmental pollution in different ways. The Aquaculture sector can thrive under conditions of water quality which ensures the optimal ecological parameters for the growing fish. Aquaculture is incompatible with environmental degradation, consequently, aquaculture stakeholders are obliged to protect the surrounding aquatic ecosystem in order to ensure the sustainability of the sector.  In fact, although aquaculture has been blamed for generating aquatic pollution, the reverse is frequently observed for example when aquatic pollution from other sectors hinders aquaculture production and fisheries.   }, keywords = {Aquaculture,pollution,Aquatic ecosystem,Food crisis}, url = {https://ejabf.journals.ekb.eg/article_85857.html}, eprint = {https://ejabf.journals.ekb.eg/article_85857_adc7c31a1cd4179e9c63ced13e97926a.pdf} } @article { author = {A. Gad, Mahmoud and A. Ashour, Ameen and I. Soliman, Mohammad and E. R. Saleh, Fatma and Z. Al-Herrawy, Ahmad and H. Nigm, Ahmed}, title = {Prevalence of enteric Protozoa on fresh vegetables and their irrigation water in Giza, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {451-468}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.85738}, abstract = {Cryptosporidium spp., Entamoeba histolytica, and microsporidia are the most common enteric protozoans acting as parasitic agents of waterborne diseases. They are considered to be responsible for human infections. Fresh vegetables are one of the most important vehicles of foodborne protozoan parasitic disease transmission. Vegetables are contaminated with enteric Protozoa from the beginning of the planting process to the consumption. In the present study, a total of ‎110 vegetable samples were collected from agriculture fields (3 regions; two from Nahia and one from Saft Al-Laban, Giza governorate, Egypt). Moreover, 36 irrigation water samples (ground and surface freshwater‎) were collected from the same agriculture fields. Another ‎group of 109 vegetable samples was collected from the public markets in Dokki district, Giza governorate, Egypt. Each sample was separately processed and examined for determining the prevalence of enteric Protozoa. The results showed that 39 (35.5%) out of 110 field-collected vegetable samples from three agriculture field areas, 37 (33.9%) out of 109 vegetable samples from markets, and 7 (19.4%) out of 36 irrigation water samples were positive for the three intestinal Protozoa.  The most contaminated vegetables were those collected from Nahia 1 area (irrigated with surface water) 41.9%, followed by the Saft area (irrigated with groundwater) 34.8% and Nahia 2 area (irrigated with groundwater) (32.1%). The most contaminated irrigation water was the surface water collected from Nahia 1 area (50%) followed by ground irrigation water in Saft Al-Laban (8.3%). No contamination in groundwater of Nahia 2 area. The most contaminated vegetable was dill collected from both filed and market samples (71.4% and 66.7%, respectively). The most dominant type of enteric parasite was microsporidia spores, on-field vegetables (18.2%), market vegetables (18.3%), irrigation water (11.1%); the last was also contaminated with Cryptosporidium oocysts (11.1%).}, keywords = {vegetables,Irrigation Water,Cryptosporidium,Entamoeba,microsporidia}, url = {https://ejabf.journals.ekb.eg/article_85738.html}, eprint = {https://ejabf.journals.ekb.eg/article_85738_da0a1f87e1cf25541bd4a8000ca1829f.pdf} } @article { author = {S. Mohammad, Ashraf and F. Mehanna, Sahar and A. A. Osman, Yassein and M. El-Mahdy, Samia}, title = {Age, growth and population parameters of the spiny squirrelfish, Sargocentron spiniferum (Forsskål, 1775) from Shalateen fishing area, Red Sea, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {469-480}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.84486}, abstract = {The study of age and growth of fish is essential for understanding their biology and population dynamics. Age and growth of Sargocentron spiniferum, from the Egyptian Red Sea at Shalateen fishing area were studied, depending on the otoliths’ readings using a non-linear back-calculation method. A total of 685 specimens (17.7–45.8 cm in TL) of S. spiniferum were aged and their maximum life span was 7 years. The Von Bertalanffy growth parameters for the investigated S. spiniferum specimens were: L∞ = 53.25 cm, K = 0.23 y-1, to = -0.66 years and the computed index of growth performance (Ø') was 2.81. The mortality rates were 1.04, 0.47 and 0.57 y-1 for total, natural and fishing mortality rates, respectively. The spiny squirrelfish fishery in Shalateen fishing area is working around its optimum situation where the estimated exploitation ratio is 0.55. The obtained data from this study are the basic inputs of the analytical models used to achieve the wise management of this potential fishery.}, keywords = {Sargocentron spiniferum,Red Sea,Population parameters Otoliths,Age,Growth}, url = {https://ejabf.journals.ekb.eg/article_84486.html}, eprint = {https://ejabf.journals.ekb.eg/article_84486_d017b9ce20712e5e78ac3123ae372a4c.pdf} } @article { author = {Nima, Akhery and Hossain, Md. Yeamin and Rahman, Md. Ashekur and Mawa, Zannatul and Hasan, Md. Rabiul and Islam, Md. Akhtarul and Rahman, Md. Ataur and Tanjin, Sumaya and Sabbir, Wasim and Bashar, Md. Abul and Mahmud, Yahia}, title = {Temporal variations of length, weight, and condition of Hilsa shad, Tenualosa ilisha (Hamilton, 1822) in the Meghna River, Southeastern Bangladesh}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {481-494}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.88776}, abstract = {The current study was on temporal variations of length, weight, and condition of Tenualosa ilisha (Hamilton, 1822) from the Meghna River, Southeastern Bangladesh for the period of July 2018 to June 2019. A total of 1433 individuals were collected from the Meghna River (Chandpur and Laxmipur region, SE Bangladesh). Bodyweight (BW) and total length (TL) were measured with 0.01 g and 0.01 cm accuracy for each specimen. The relative condition factor (KR) was calculated by the equation of Le Cren (1951): KR = W/(a×Lb) where W is the body weight (g) and L is the total length (cm) and a & b is the length-weight relationship parameters estimated with linear regression analyses. The value of KR ~ 1 indicates good health, >1 indicates over bodyweight with compare to length, whereas <1 indicates a relatively poor condition of fish. The TL ranged from 15.3-57.8 cm while the BW was 37.17–2250 g. The overall KR for T. ilisha was 0.65-1.66 in the Meghna River. The maximum KR was found in July while the minimum was in January. The KRwas strongly correlated with BW in the Meghna River. These findings will help to improve the sustainable management policy of hilsa fishery in the Meghna river ecosystem and other adjacent water bodies.}, keywords = {temporal variation,Relative condition,Tenualosa ilisha,Meghna River,Bangladesh}, url = {https://ejabf.journals.ekb.eg/article_88776.html}, eprint = {https://ejabf.journals.ekb.eg/article_88776_d81f4b7a5c0dbdaac3b31bc366fa85a3.pdf} } @article { author = {Darasi, Fahd and Mehanna, Sahar and Aksissou, Mustapha}, title = {The Coastal Fisheries in Tangier port: Catch assessment and Current Status}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {495-506}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.85737}, abstract = {The region of Tangier is a typical multi-species and multi-fleet fishery with a large diversity of species exploited by a wide range of fishing techniques. The aim of this study is to evaluate the current status of coastal fishing in the port of Tangier for different coastal fishing types (trawl, purse-seine, and longline), and assess the different fishing gears types operated in the port. Fishery statistics, for the different fishing types over 7 years (2011 to 2017) were collected and analyzed. The composition of fish resources in the port of Tangier is 70% pelagic fish, 24.5% demersal fish, 3.2% crustaceans, and 2.3% cephalopods. The Schaefer model was applied to the catch per unit of fishing effort (CPUE) indices to determine the level of utilization (maximum potential sustainable). The present level of fishing effort of trawl and purse seine fisheries could be expanded to obtain MSY, while for longline the catch could be increased by about 94% of its current value by applying the current number of vessels.  The 2/3 fMSY as a target reference point was estimated for the longline fishery, where fishing can be increased by about 72% through reducing the number of fishing vessels by 31% of its current number, but further studies using analytical models and more time series data are needed before any action.}, keywords = {CPUE Catch Longline Purse,seine Port of Tangier Trawl Surplus models}, url = {https://ejabf.journals.ekb.eg/article_85737.html}, eprint = {https://ejabf.journals.ekb.eg/article_85737_bf980e8bd138eb1160c941733d663820.pdf} } @article { author = {A.H. Ibrahim, Hassan and M. Elshaer, Mostafa and E. Elatriby, Dalia and O. Ahmed, Hamdy}, title = {Antimicrobial activity of the sea star (Astropecten spinulosus) collected from the Egyptian Mediterranean Sea, Alexandria}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {507-523}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.86046}, abstract = {A species of sea star was collected from the Mediterranean Sea, Alexandria, Egypt. It was identified based on general morphological and anatomical features as Astropectenspinulosus. The antibacterial and antifungal activities were investigated via the standard techniques. Data obtained revealed that the inhibition zones as a factor for antibacterial activity of A. spinulosus ranged between 0 and 18 mm. The highest antibacterial activity was detected against P. aeruginosa (18 mm) for ethanol extract, followed by B. subtlis (14 mm) for methanol extract, then by P. aeruginosa (13 mm) for both ethyl acetate and methanol extract. Different solvent extracts recorded inhibition zones as antifungal activity ranged between 8 to 10 mm. the most suppressed fungus was P. crustosum by acetone and ethanol extracts as80 and 90%, respectively. Weakly, A. terreus was suppressed by ethanol and methanol extracts of A. spinulosus as 10 and 20%, respectively. The suppression was not taken place against other fungi by any solvent extract. Regarding to investigating the efficacy of some commercial antibiotics (mm), data confirmed that the Gram-negative bacteria were more resistant than Gram-positive bacteria. On the other side, the result of GC-MS/MS of crude extract observed the presence of several bioactive constituents, most of which had antimicrobial activities.}, keywords = {antimicrobial activity,Sea star,Astropecten spinulosus,Mediterranean Sea,alexandria}, url = {https://ejabf.journals.ekb.eg/article_86046.html}, eprint = {https://ejabf.journals.ekb.eg/article_86046_4664cb8f4a91e7e9166ba5b9a7294d41.pdf} } @article { author = {H. D. Nguyen, Ton and M. Dinh, Quang}, title = {Otolith dimensions and their relationship with the size of Glossogobius sparsipapillus fish along the coastline of Mekong Delta, Vietnam}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {525-533}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.86013}, abstract = {This study provides knowledge on otolith morphometrics and the relationships between otolith dimensional length, weight, body height, and a head length of Glossogobius sparsipapillus. A total of 572 individuals were measured in this study, of which 308 males and 264 females. The samples were collected from April 2019 to January 2020 at three studied sites from Vinh Hau, Hoa Binh, Bac Lieu to Dien Hai, Dong Hai, Bac Lieu and Tan Thuan, Dam Doi, Ca Mau. The length, width, and weight of the otolith did not differ between the left and right of otoliths as well as males and females. However, the differences in length, width, and weight of otoliths varied among the three studied sites. The weight of the otolith was closely related to the length, weight, body height, and head length of the fish. The results showed that otolith weight can be used to determine fish size.}, keywords = {Mekong Delta,goby,Glossogobius sparsipapillus,otolith,Vietnam}, url = {https://ejabf.journals.ekb.eg/article_86013.html}, eprint = {https://ejabf.journals.ekb.eg/article_86013_6d052f8ee36823af5cb821054fe4b649.pdf} } @article { author = {Al-Aizari, Hefdhallah and Fegrouche, Rachida and Al-Aizari, Ali and Darwsh, Nabil and Al-Kadasi, Fouad and Chaouch, Abdelaziz}, title = {Assessment of Treated Wastewater Quality And Impact Of Using It On The Soil In Wadi Al-Mawaheb-Dhamar, Republic Of Yemen}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {535-547}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.87820}, abstract = {This study aims to assess wastewater quality in Wadi Al-Mawaheb Dhamar city, and the extent to which it used for irrigation and its comparison with standards of the food and agriculture organization (FAO), and compare it with some old data, and also assessing its impact on the soils. The results of the study showed that the wastewater treatment plant for the city of Dhamar is unable to treat the required and that it is only a collection point for wastewater flowing from the city of Dhamar collecting wastewater and allowing it to flow to the Valley of Talents, and through the results of the analysis of wastewater inlet and outlet of The station, the analysis showed that there is no significant difference to the results of the analysis, which indicates that the wastewater plant is not working on the required treatment, due to weak capacity of the station, and also then compared it with results of the analysis of 2005, 2009 and 2012, it found that there is a big difference in the results of the analysis. As well as the US salinity diagram illustrates that of the treated wastewater sample fall in the field of C4-S2, indicating high salinity and low sodium water, which can be used for irrigation on almost all types of soil without danger of exchangeable sodium. As for the results of the analysis of the soil irrigated with wastewater used, its effect was low on soil and it does not appear only after some time.}, keywords = {Wastewater,types of soil,physical parameters,Alkali Hazard,salinity}, url = {https://ejabf.journals.ekb.eg/article_87820.html}, eprint = {https://ejabf.journals.ekb.eg/article_87820_baca9918c20feafef0634adb096aa3be.pdf} } @article { author = {Haoujar, Imane and Abrini, Jamal and Chadli, Housni and Chebbaki, Kamal and Cacciola, Francesco and S. Senhaji, Nadia}, title = {Influence of nitrogen and phosphorus concentrations for the intensive cultivation of marine microalga, Nannochloropsis gaditana, in the local conditions of M’diq, Morocco.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {549-554}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.86152}, abstract = {The influence of nitrogen and phosphorus of different concentrations on biomass production of the green microalga Nannochloropsis gaditana was investigated. The result revealed that there was a significant difference among nitrogen concentrations and among phosphorus concentrations in the promotion of algal biomass growth. Sodium nitrate (150 g/L) and sodium dihydrogen phosphate (10 g/L) were found to be preferred concentrations of nitrogen and phosphorus with a cell growth of 71.375×106 cells/mL and 46.787×106 cells/mL, respectively.}, keywords = {Nannochloropsis gaditana,Sodium nitrate,Sodium dihydrogen Phosphate,biomass growth}, url = {https://ejabf.journals.ekb.eg/article_86152.html}, eprint = {https://ejabf.journals.ekb.eg/article_86152_865781b4197e3bc6d569b424179e5b55.pdf} } @article { author = {Riad, Rafik}, title = {Monograph of the Egyptian Cuttlefishes Order: Sepioidea; Cephalopoda: Mollusca (Part I)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {555-590}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.86923}, abstract = {Class Cephalopoda includes cuttlefishes, squids, octopuses, and nautili, which are very important ecologically and commercially. Species of the first three groups are present in the Egyptian Mediterranean and Red Seas. They constitute a main component in the fisheries industry. In order to understand the biology and ecology of different species, their identification should be conducted properly to maximize the accuracy of any study. The present monograph is the first-in-kind for this group and has been prepared to demonstrate an identification key for the cuttlefish species in the Egyptian waters. Second and third monographs that cover squids and octopuses will be published in the near future. Eight cuttlefish species were recorded in the Egyptian waters. These are Sepia officinalis, S. elegans, S. dollfusi, S. pharaonis, S. elongate, S. parashadi, S. savignyi and Rossia macrosoma. The identification was done using morphometric characteristics, which were dissected, photographed, and drawn. }, keywords = {Monograph,Egyptian,Red Sea,Mediterranean,cuttlefishes,Sepioidea,Mollusca}, url = {https://ejabf.journals.ekb.eg/article_86923.html}, eprint = {https://ejabf.journals.ekb.eg/article_86923_12c3f7b069ef165b1fbfde66c50755c0.pdf} } @article { author = {Sabbir, Wasim and Hossain, Md. Yeamin and Rahman, Md. Ashekur and Hasan, Md. Rabiul and Mawa, Zannatul and Tanjin, Sumaya and Ul-Hassan, Habib and Ohtomi, Jun}, title = {First Report on Condition Factor of Panna heterolepis (Trewavas, 1977) in the Bay of Bengal (Southwestern Bangladesh) in Relation to Eco-Climatic Factors}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {591-608}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.87095}, abstract = {The current study describes the first report on condition factors (Fulton’s, KF; allometric, KA; relative, KR and relative weight, WR) of Panna heterolepis in relation to eco-climatic factors (temperature, rainfall, dissolved oxygen and pH) in the Bay of Bengal, SW Bangladesh. All together 1224 specimens (male = 654, female = 570) were caught through January to December 2019. Bodyweight (BW), as well as total length (TL), was assessed by digital balance and measuring board with 0.01 g and 0.01 cm accuracy. TL was varied between 10.70-31.40 cm for males and 10.50-34.50 cm for females. Further, BW was ranged from 10.02-203.89 g for males and 9.02- 342.26 g for the female population. The KF values ranged from 0.56 to 1.12 for males and 0.60 to 1.45 for females. On the other hand, KA varied between 0.0047 to 0.0212 for males and 0.0050 to 0.0267 for females. Besides, KR varied between 0.79 to 1.39 for males and 0.73 to 1.55 for females. However, WR ranged from 78.55 to 139.24 for males and 73.24 to 154.47 for females. Fulton’s condition factor (KF)was found the best for evaluating the well-being of this species in the Bay of Bengal. Further, KF was found significantly related to temperature for both males (P = 0.04) and females (P = 0.04) but not with other factors. The mean WR indicated that the habitat was in a balanced condition considering prey-predator status. The outcomes of the study will be helpful for future management of this fish in the Bay of Bengal considering the emerging climate change.}, keywords = {Panna heterolepis,Condition factor,eco-climatic factors,Bay of Bengal}, url = {https://ejabf.journals.ekb.eg/article_87095.html}, eprint = {https://ejabf.journals.ekb.eg/article_87095_10be2a281e015b0306eb5aee34e96cb7.pdf} } @article { author = {A. Mohammed, Khadra and Kheireldin, Khaled}, title = {Evaluation of the Environmental Impacts of Bahr Al Baqar Drain on Manzala Ecosystem; using Rapid Impact Assessment Technique}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {24}, number = {2}, pages = {609-625}, year = {2020}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2020.86873}, abstract = {To evaluate Bahr Al Baqar Drain's impacts on the surrounding ecosystem, the present research used Rapid Impact Assessment Matrix (RIAM) involving a total of 195 parameters to provide a complete environmental assessment. Physical-chemical (41 parameters), biological-ecological (51), social-cultural (46), and economical-operational (57) were used for the evaluation. According to RIAM results, 36.6% of physical-chemical parameters induced moderate negative changes in the drain environment, while 27.5% of biological-ecological parameters displayed moderate negative impacts. For social-cultural parameters, 34.8% showed no environmental change to the drain, while other parameters were subjected to the negative side of RIAM. Economical-operational parameters recorded slight negative changes by 42.1%. Totally, all the recorded parameters in RIAM induced negative significant impacts on the environmental status of Bahr Al Baqar Drain except 27% of those parameters. The research indicated that RIAM is a very useful tool for decision-makers as it is able to demonstrate the environmental situation of different projects in order to offer the best environmental solutions.}, keywords = {Bahr Al Baqar Drain,Rapid Impact Assessment Matrix RIAM,Environmental Impact}, url = {https://ejabf.journals.ekb.eg/article_86873.html}, eprint = {https://ejabf.journals.ekb.eg/article_86873_95363350eda1468594dd03f1559b1a50.pdf} }