@article { author = {Hamdy, Rasha and G. Ibrahim, Heba}, title = {Recent changes in polychaete community along the Alexandria coast, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {1-12}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.25931}, abstract = {The polychaete community was studied monthly along the Alexandria coast during the period from October 2014 to October 2015. The results indicated the occurrence of 56 polychaetes species, including four species recorded for the first time in the study area, namely Kirkegaardia annulosua, Dipolydora armata, Neogyptis cf. mediterranea, and Notomastus profundus. The recorded species belong to 42 genera and 19 families, with the dominance of family Syllidae. The numerical density of polychaete individuals displayed wide variation on the spatial and temporal scales, fluctuating among the sampling sites between a minimum of 233±305 ind/m2 and a maximum of 3901±2597 ind/m2. A few species were responsible of the bulk of polychaete abundance. Comparing with the previous works, the present study revealed pronounced decrease in species richness and marked drop in the abundance of polychaete community along the Alexandria coast, mainly due tomarked decrease in the abundance of several dominant species during the past decade. The changes in the community structure and abundance of polychaetes could be attributed to the engineering processes of the coastal road, variations in the topography of the coast line and modification of the sewer system of Alexandria City.}, keywords = {Polychaete diversity Alexandria Coast,Mediterranean Sea,species richness,Dominant species}, url = {https://ejabf.journals.ekb.eg/article_25931.html}, eprint = {https://ejabf.journals.ekb.eg/article_25931_a2c94d8b286fcf2bb180e8435ecc9656.pdf} } @article { author = {M. Amin, Amal and M. Sabrah, Manal}, title = {Basic Parameters for Assessment and Management of the Short-Finned Squid Illex coindetii (Verany, 1839) (Cephalopoda, Ommastrephidae) from the deep water off the Egyptian Mediterranean Sea.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {13-26}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.25929}, abstract = {This research is the first study of Illex coindetii from the deep sea fishing ground adopted in the Egyptian Mediterranean Sea. That assist to prevent stock reduction by estimation of growth parameters, mortality, and size at maturity which taken as a reference point of minimum legal size to prevent stock depletion. Specimens of Illex coindetii were collected from bottom trawl vessels at 250:850 m depths from the Egyptian Mediterranean Sea. A total of 370 Illex coindetii individuals 189 males and 157 females and 24 unidentified sexes were carried out seasonally in 2016. The length-weight relationship showed negative allometry for females and sexes combined "b" 2.01, 2.64 and positive allometric growth for males "b"3.16. There has been a difference between the sexes with concern length-weight relationships with males being smaller and lighter than females. Age was determined using length frequencyanalysis. The asymptotic length(L∞), the growth rate (K) and (t0) were estimated as 21 cm, 0.570 year-1 and -0.341 years for males, 31.5 cm, 0.22 year-1and -0.755 year for females and 31.5 cm,0.28 year-1 and -0.587year for sexes combined respectively. The annual total mortality (Z), natural mortality (M) and fishing mortality (F) were estimated at 2.94, 1.05 and 1.89/year for males while those of females were 2.76, 0.746 and 2.02 and 2.79, 0.74, 2.05/year for the sexes combined respectively.ML50was estimated as, 14.35 cm for females and 11.51 cm for males. Two peaks in GSI were attained of mature females, one in spring and the other in autumn. The result of the exploitation rate of the sexes combined (0.73) indicated overexploitation which was higher in females (0.73) than males (0.64). }, keywords = {Mediterranean Sea,Illex coindetii,Short-Finned Squid,growth parameters,mortality,Spawning period}, url = {https://ejabf.journals.ekb.eg/article_25929.html}, eprint = {https://ejabf.journals.ekb.eg/article_25929_a85d2aac5919e71ab5aa6116e806416e.pdf} } @article { author = {A. Basheer, Manar and B. El Kafrawy, Sameh and A. Mekawy, Amal}, title = {Identification of mangrove plant using hyperspectral remote sensing data along the Red Sea, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {27-36}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.25932}, abstract = {The mangrove ecosystem is one of the most productive habitats that support many marine species and its adaptation to adverse environmental conditions, increase the demand to map, manage and monitor this ecosystem. The presence of hyperspectral remote sensing techniques can potentially improve the ability to measure the spectral signature of mangrove to differentiate mangrove from the other vegetation and to get detailed information about this ecosystem. This study has been carried out for mapping, monitoring and managing the Red Sea mangrove ecosystems through measuring their spectral properties using advanced hyperspectral remote sensing techniques. The spectral signature data were measured using Analytical Spectral Devices (ASD) Fieldspec spectroradiometer on November 2016 then the data were tested using statistical measures namely One-way Analysis of Variance (ANOVA) along with Tukey’s HSD test. The hyperspectral signatures of A. marina mangrove at the different sites showed that mangroves recorded a high reflectance at the visible and NIR region of the spectrum than the other regions and there are similarities at certain wavelengths and some differences at other wavelengths used for differentiation between mangroves in various environments. ANOVA and Tukey’s HSD test results showed that NIR region is the best region for the differentiation of mangrove from the other vegetation.}, keywords = {Mangrove,Avicennia marina,Hyper-spectral signature,Remote Sensing,Red Sea}, url = {https://ejabf.journals.ekb.eg/article_25932.html}, eprint = {https://ejabf.journals.ekb.eg/article_25932_37a62f37ede67ef28d251b29e15bbe45.pdf} } @article { author = {Agbugui, M. O. and Oniye, S. J.}, title = {Aspects of the Biology of Protopterus annectens from Agenebode at River Niger, Nigeria}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {37-45}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.25746}, abstract = {The African lung fish, Protopterus annectens from Agenebode, in the Lower River Niger was investigated for aspects of its biology. Samples of the fish were collected from October 2016 to November 2017. Sex ratio of 1:1.4 (male to females) was obtained from the river. The results from the stomach analyses revealed that P. annectens consumed mud, detritus and sand (100%). Bird’s foot was regarded as incident diet (0.01%)while grass was also observed to be part of the relevant diet (7.1%) of the fish, an indication that it is an omnivore.The Gonadosomatic Index (GSI) ranged from 12.34 to 13.33. The peak of GSI were observed during the months of September, October and November, coinciding with the end of wet season. Highly fecund fish were also observed in the months of October and November and then a decline in December, again these months experienced decline in rainfall thus suggesting the end of spawning periods. The changes in GSI revealed that Protopterus annectens has specific maturing, spawning and breeding periods. Protopterus annectens was found to be highly fecund with eggs range from 72,275 to 129,732 (mean value of   92,116 ± 743 eggs). This study also revealed that fecundity was more relative to body weight than length of fish.}, keywords = {P. annectens,Agenebode,River Niger,gonadosomatic index,fecundity}, url = {https://ejabf.journals.ekb.eg/article_25746.html}, eprint = {https://ejabf.journals.ekb.eg/article_25746_0113cfb7628f651b1991df652b64e39e.pdf} } @article { author = {A. M., Abdelhamid and Salem, M. F. I. and El-Shebly, A. A. and Sultan, A. S. I.}, title = {Is It Possible to Detoxify Aflatoxic Aquafeed?}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {47-63}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.25916}, abstract = {The aim of this experiment was to investigate the effect of aflatoxin B (AFB) in the diets of Nile tilapia (Oreochromis niloticus) and to examine the detoxification activity of a commercial anti-mycotoxin ARCAVIT® Bioacid Forte . The experimental period lasted 70 days during September - December 2018. Sixty fish were chosen with an average initial weight of about 40 g then randomly distributed into three treatments in six glass aquaria (30 × 60 × 40 cm); each treatment was applied in two aquaria (replicates). Dietary AFB was added at a concentration of 5 ng / g diet. The anti-mycotoxin ARCAVIT® (pro- and prebiotics) is one of the commercial anti-mycotoxins in the local market. It is the first test for it in aquaculture, which was added at a concentration of 0.5 g/Kg diet. The experimental diets of the three treatments were; the control treatment (T1): the basal diet (BD) without any additives. The second treatment (T2): BD with an addition of 5 ng AFB / g diet. The third treatment (T3): BD with an addition of 5 ng AFB / g diet and 0.5g ARCAVIT® / Kg diet. Fish fed the experimental diets at a daily rate of 3% of their live body weight, at two meals. The obtained results showed that AFB is very toxic, even at a low concentration as 5 ng / g diet, for Nile tilapia. It threats fish morphology, gross pathology, liver histology, growth performance, and internal organs indices, feed utilization, body composition, and properties, as well as hematological and plasma biochemistry parameters. Moreover, the anti-toxic agent (ARCAVIT®) at the tested level did not completely overcome the aflatoxicity symptoms. That leads to keep the old wisdom "Prophylaxis is better than cure".    }, keywords = {Aflatoxin,Nile tilapia,Detoxification,Mycotoxins,Aquafeed,probiotic,prebiotic}, url = {https://ejabf.journals.ekb.eg/article_25916.html}, eprint = {https://ejabf.journals.ekb.eg/article_25916_4a091549e21dd9755dc6e1702fef61a6.pdf} } @article { author = {Larbi Doukara, Kamel}, title = {Density and ecological aspect of endangered limpet Patella ferruginea in the western Algerian coast: Implications for the Conservation}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {65-76}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28015}, abstract = {The endemic limpet Patella ferruginea is the most endangered invertebrate in the Mediterranean Sea.The study of this species, as a species in danger of extinction, was carried out to provide a detailed map of the distribution of P. ferruginea and implication for preservation as well as its morphological types.  A total of 1262 specimens of P. ferruginea were found in two areas of the Algerian western coast: one continental (Cap Falcon) and the other insular (Habibas Islands). The mean size of P. ferruginea on the Habibas Islands (61.2 mm) was significantly (p < 0.001) greater than that on Cap Falcon (39.5 mm). The best Size–frequency distribution of this species was observed inHabibas Islands, with the largest specimen measured 137 mm. P. ferruginea in Algeria showed the highest mean density ever reported (1.5 individual/m). The population structure was characterized by high numbers of females. Area accessibility had greatly impacted the occurrence of this species. Two different morphological types of P. ferruginea has been recorded in the studied areas where the results demonstrated the dominance of the Lamarcki form, while the Rouxi form was confined to exposed sites.}, keywords = {Patella ferruginea,Distribution,conservation,Biometrics,Lamarcki,Rouxi,Algeria}, url = {https://ejabf.journals.ekb.eg/article_28015.html}, eprint = {https://ejabf.journals.ekb.eg/article_28015_5cdf9f8cd07bc1f9b921b69f90a786e0.pdf} } @article { author = {M. Azab, Ahmad and M. M. Khalaf-Allah, Hassan}, title = {Morphological differences of scales and gill rakers used as a taxonomic character in some thick-lip fish species (Family: Labridae), Red Sea, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {77-91}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26442}, abstract = {The present study aimed to study the possibility of using the morphological features of scales and gill rakers as taxonomic characters in some thick-lip fish species, Hemigymnus fasciatus and Hemigymnus melapterus. Fishes were collected from land fish market in Hurghada of Egyptian Red Sea, during the period from April 2016 to May 2017. The scales and the first gill arches of studied species were removed, stained and examined. Scales of H. fasciatus and H. melapterus are mainly of cycloid type, triangular shape and they don’t find on operculum (OOP) region. Scale margin is smooth in all regions in H. fasciatus, but it is convex in under pectoral fins in H. melapterus. Scale focus has oval shape in H. fasciatus and elongated oval shape in H. melapterus. Separation line has reversed V shape in all regions in first species and semi-striated shape in the caudal peduncle area in the second one. Granulation area of H. fasciatus has crescent shape but in H. melapterus it has triangle shape. Gill rakers of the anterior row have sharp tips in H. fasciatus and but have forked tips in H. melapterus. Gill rakers of the posterior row have flower like shaped base in H. fasciatus and leaf or cup shaped base in H. melapterus. The anterior row has 22-23 gill rakers in H. fasciatus and it has only 20 gill rakers in H. melapterus. The posterior row has only 16 gill rakers in H. fasciatus and it has 18-20 gill rakers in H. melapterus. In conclusion, the morphology of scales and gill rakers in H. fasciatus and H. melapterus can be used as diagnostic characters (finger print) in their classification.}, keywords = {Hemigymnus fasciatus,Hemigymnus melapterus,Labridae,Red Sea,Morphology,Scales}, url = {https://ejabf.journals.ekb.eg/article_26442.html}, eprint = {https://ejabf.journals.ekb.eg/article_26442_8c3e241fc4fd7f8b2b0037369e2b218b.pdf} } @article { author = {A. Awadalla, Eatemad and Abdelsadik, Ahmed and A. Mohamed, Amal}, title = {Watermilfoil Myriophyllum spicatum extract attenuates cadmium toxicity in the kidney of Bufo regularis}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {93-104}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26717}, abstract = {Pollution becomes one of the uppermost environmental concerns worldwide, especially chemical pollution, which affects the environment, public health of man and threaten other species life. Chemical pollution is frequently a consequence of daily human activities beside manufacturing and disposing of chemicals. Bufo regularis are an example of amphibians in its way to extinction because of chemical pollution. The existing work designed to find a naturally produced substance for protection of Bufo regularis against the chemical pollution. The antioxidant activity of the methanolic extract of Myriophyllum spicatum (MEM) was assessed in vitro using 2, 2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) assay.The value of inhibitory concentration 50 (IC50) for DPPH radical scavenging was 28.77 ±1.58 µg/mL and the total antioxidant activity of MEM was 191.17±7.1 mg AA equivalent/g extract.  For in vivo studies, 40 adult male toads were divided into 4 groups. Levels of malondialdehyde (MDA), proinflammatory cytokines and iNOS showed significantly higher expression in the kidney homogenates of Cd group. These inflammatory alterations accompanied with marked tissue damage in the kidney of Cd-group and moderate improvement of kidney architecture up on administration of the MEM extract as demon-strated by light and electron photomicrographs. In conclusion, current data confirmed that the Myriophyllum spicatum extract has a potent antioxidant activity against renal toxicity induced by Cd in B. regularis.}, keywords = {pollution,Bufo regularis,cadmium,Myriophyllum spicatum,Toads,Oxidative Stress,Cytokines}, url = {https://ejabf.journals.ekb.eg/article_26717.html}, eprint = {https://ejabf.journals.ekb.eg/article_26717_e4d90308f88b9d7d4af2403f85c5c85a.pdf} } @article { author = {Elshanawany, Rehab and Naiel, Bassant and Fawzy, Manal}, title = {Distribution of benthic foraminiferal assemblage and heavy metals as a characterization of the environment in Lake Edku, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {105-133}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.38330}, abstract = {Lake Edku receives considerable amounts of domestic, agricultural, and industrial waste water. Accordingly, the response of benthic foraminifera to heavy metal pollution has been assessed. Surficial sediment samples were collected at 11 stations throughout the lake during June and December 2013. At each station, pH, dissolved oxygen, temperature, salinity, transparency, water depth, concentrations of Pb, Cu and Cd were measured. Benthic foraminiferal distribution and its relationship with environmental parameters and heavy metal concentrations have been investigated using redundancy analysis (RDA) and cluster analysis. The resulted data show that the foraminiferal distribution was significantly affected by these heavy metals pollution. The distribution pattern shows great dominance of Ammonia tepida which confirms its tolerance to heavy metals pollution especially Cu and Cd. Porosononion spp.correlates positively with Cu, while Saccorhiza ramosa correlates positively with Pb and Cd. The most sensitive species to higher concentrations of heavy metals is Ammonia Parkinsoniana.It has negative correlation with Pb, Cu and Cd. Limited number of living foraminiferal specimens, low foraminiferal density and diversity have been recorded in Lake Edku. Relatively high percentage of deformed foraminiferal tests (~ 21%) has been observed in the lake.}, keywords = {Benthic foraminifera,Lake Edku,Heavy metals,pollution,Sediment}, url = {https://ejabf.journals.ekb.eg/article_38330.html}, eprint = {https://ejabf.journals.ekb.eg/article_38330_04b18e0b66a6929a0d7cf18d81da7551.pdf} } @article { author = {R. Fishar, Mohamed and H. Mahmoud, Neveen and A. El- Feqy, Faten and M. G. Gaber, Khadiga}, title = {Community Composition of Zooplankton in El-Rayah El-Behery, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {135-150}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26815}, abstract = {The abundance and diversity of zooplankton has been studied in relation to some environmental variables in El-Rayah El-Behery (one of the main irrigating canals of Nile Delta). Eight physical and chemical parameters were investigated for water quality assessment during the period from autumn to winter 2014.The results indicate that, there was negative correlation between temperature, pH and zooplankton. Rotifers have high positive correlation with nutrient and EC, while Protozoa was positively affected by DO. Sixty one species of zooplankton had been identified during the present survey (42 Rotifera, 9 Protozoa, 7 Cladocera and 3 Copepoda).The highest number of species and diversity index (S= 56 and 2.8) were recorded at B1 and B5, while the lowest value was recorded at B6 (S= 40). Rotifers formed a main component of zooplankton, which indicates eutrophic state of El-Rayah El-Behery. Prolides sp. was the main rotifer species during the present study. It was recorded at all sampling stations and was found in all seasons. Vorticella campanula was the most abundant protozoan; it contributed about 42.1% of the total Protozoa populations and flourished in summer. Bosmina longirostris was the most dominant species of cladocera and was represented by about 58.9% of total Cladocera. The highest bulk of total copepods was represented by Nauplius larvae, which recorded about 74.8% of total copepods. There was a sharp increasing in total zooplankton during spring with an average of 1348750 Ind/m³ and a marked decrease during summer with an average number of 635750 Ind/m³.}, keywords = {Zooplankton,El-Rayah El-Behery,water quality,environmental variables}, url = {https://ejabf.journals.ekb.eg/article_26815.html}, eprint = {https://ejabf.journals.ekb.eg/article_26815_5500ee6eefd62702eac43bc5b218c14e.pdf} } @article { author = {M. Ahmed, Omaima and F. Amin, Hesham}, title = {Effect of UV- C radiation on survival of Escherichia coli O157: H7 inoculated fish fillets from fresh water and marine sources}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {151-159}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26450}, abstract = {The effect ofUV-C radiation techniqueon survival of Escherichia coli O157:H7 inoculated the freshwater Nile tilapia (Oreochromis niloticus) and marine Japanese threadfin bream (Nemipterus japonicas) fillets were investigated. Tilapia samples  (average weight and length are 150 ± 10 g, 15 ± 5 cm, respectively) and threadfin bream (average weight and length are 120 ± 5 g and 15 ± 2 cm, respectively) were purchased from local fish market in 2018 and filleted. The fish fillet samples were inoculated with Escherichia coli O157:H7 strain, and subjected to UV treatment (15 W) at four different distances (12, 24, 30 and 45 cm) from the UV lamps that emitted monochromatic UV irradiation at 253.7 nm. Each UV-C radiation treatment was performed for 5, 10, 15, and 20 min.  Results showed that the maximum reduction of E. coli O157:H7 of 1.82 logs CFU/g in threadfin bream samples treated for 20 min treatment at 45 cm. whereas in tilapia samples maximum reduction of E. coli O157:H7 was 1.1 logs CFU/g treated for 15 min at 24  cm. In conclusion, this study recommends that UV-C radiation could be used as a successful technique to improve the safety of fish fillets from fresh water and marine sources.}, keywords = {Escherichia coli,O157:H7,UV-C radiation,Oreochromis niloticus Nemipterus japonicas}, url = {https://ejabf.journals.ekb.eg/article_26450.html}, eprint = {https://ejabf.journals.ekb.eg/article_26450_7b911b671dbfdf277dc7d973c4c1f9ee.pdf} } @article { author = {S. Mossalem, Hanan and M. Ibrahim, Amina}, title = {The ameliorative potential of the ethanol extract of the plant Ocimum basilicum on Biomphalaria alexandrina snails exposed to the insecticide Bestacid}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {161-172}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26691}, abstract = {Bestacid E.C. is a commercial insecticide may contaminate the snail habitats.. Biomphalaria alexandrina snails act as bioindicators of environmental pollution. Ocimum basilicum plant showed many pharmacological effects. The present investigation studied the potential protective effect of O. basilicum ethanol extract on Bestacid- induced toxicity on B. alexandrina snails. The results indicated that Bestacid E.C. had a molluscicidal effect on snails, where, LC50 was 25 mg/l. Continous exposure of snails to the sublethal concentration (LC25) of Bestacid for two weeks followed by two weeks of recovery decreased their survival, reproductive rates (RO) and total blood count than the control ones and caused several histopathological alterations in the hermaphrodite gland. Treating B. alexandrina snails with Bestacid and the same equivalent or double concentration of the ethanolic extract of O. basilicum plant for two weeks led to an improvement of the biological, histological and hematological alterations induced by Bestacid E.C., where, it caused amelioration in the tissues of the hermaphrodite gland histology and this mirrored on survival and reproductive rates and increased the mean total number of hemocytes. It was concluded that using eco-friendly material like O. basilicum may help in the amelioration of the toxic effects of the chemical pollution.}, keywords = {B. alexandrina,Ocimum basilicum,Bestacid,hemocytes,Hermaphrodite gland}, url = {https://ejabf.journals.ekb.eg/article_26691.html}, eprint = {https://ejabf.journals.ekb.eg/article_26691_0ae5bc5be85f9d0231897dc4f26372f9.pdf} } @article { author = {M. Hamed, Moaz and S. Abdelftah, Lamis}, title = {Biosynthesis of gold nanoparticles using marine Streptomyces griseus isolate (M8) and evaluating its antimicrobial and anticancer activity}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {173-184}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26508}, abstract = {The implementation of actinomycetes for the biosynthesis of metal nanoparticles as a nature-friendly, safe and hopeful way is welcome due to its non-toxicity and naturalness. Out of nine actinomycetes isolates was isolated from sediment of the Suez Gulf, Egypt, only one isolate (M8) showed ability for biosynthesis of gold nanoparticles using extracellular supernatant. Isolate (M8) was selected and identified as Streptomyces griseus on the basis of cultural, morphological, and physiological properties, additionally 16S rRNA sequence. The gold nanoparticleswere confirmed using by Visible UV spectrophotometer, Fourier Transform Infrared (FTIR) Spectroscopy and Transmission Electron Microscopy (TEM). Au-Nps ranged from 19 to 28 nm in size and hexagonal in shape. Au-NPs synthesized by Streptomyces griseus isolate (M8) showed displayed a significant antimicrobial activity against gram positive bacteria Enterococcus faecalis 29212 (10 mm), gram negative bacteria Escherichia coli 19404, Pseudomonas aeruginosa 9027, Salmonella typhimurium 14028, Vibriofluvialis, and Vibrio damsel (10, 20, 28, 25 and 18 mm respectively), and yeast Candidaalbicans (18 mm) in well diffusion method. Moreover, gold nanoparticles exhibited a significant degree of anticancer activity against two different cancer cell lines Colon carcinoma cells (HCT-116) using 61.9 ug/well and breast carcinoma cells (MCF-7) using 46.6 ug/well.}, keywords = {Gold nanoparticles,Streptomyces griseus,Actinomycetes,Antibacterial,Anticancer}, url = {https://ejabf.journals.ekb.eg/article_26508.html}, eprint = {https://ejabf.journals.ekb.eg/article_26508_5b4de05f734dcdd9c55bebde2757ea58.pdf} } @article { author = {S. El Daba, Abd El-Mohsen and Abd El Wahab, Mohamed and Abd El Ghany, Mohamed}, title = {Sedimentary characteristics of some island beaches and their effects on nesting numbers of marine turtles, Red Sea, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {185-195}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26931}, abstract = {The impact of beach sands on nesting numbers (NN) of two species; the hawksbill Eretmochelys imbricate and the green turtle Chelonia mydas on three Egyptian Islands was syudied. The influence of grain size on nests number varied across the three island beaches. The study revealed that gravel fraction showed low values, sand fraction of sediments has heights values and lower abundance of the fine sediments at three studied beaches. Moreover, the average percentage of biogenic content (66.90%, 68.02%, and 60.17%) was recorded in small Giftun, big Giftun and Zabargad beaches respectively. Correlations (Pearson’s correlation) among sediment texture, mean grain size (Mz), sorting, biogenic content and number of nests of three studied islands showed that the NN have a positive correlation with biogenic content and no correlation was found between NN and Mz in the studied beach sediments at the three Islands. The Hierarchal Cluster Analyses (HCA) dendrogram of sediment type, grain size characteristics, biogenic content and number of the nests (NN) in beach sediments along the three studied Islands are supported by Pearson’s correlation coefficient.The condition of the offshore approaches seems to be important in choice of a nesting beach, for example, the tourism activities at Giftun Island make Hawksbill turtles vulnerable to these activities. In contrast, Green turtles at Zabaragd Island seem to prefer beaches of fine sediments or sub-tidal reefs.}, keywords = {Marine turtles,Beach sediments,Grain size,Zabaragd Island,Giftun Island,Red Sea,Egypt}, url = {https://ejabf.journals.ekb.eg/article_26931.html}, eprint = {https://ejabf.journals.ekb.eg/article_26931_2c42d433527f3b01ddd8e72c6bb258fe.pdf} } @article { author = {E. Philips, Amal}, title = {Fishery biology of Terapon puta (Cuvier, 1829) from east Egyptian Mediterranean waters}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {197-203}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26580}, abstract = {This  study aimed to investigate the fishery biology of Terapon puta, family Teraponidae,caught during 2016 with bottom trawlers from east Egyptian Mediterranean waters at Damietta and Port Said. The total number of fish studied at the present study was 506, ranged from 6-14 cm, total  length.  Length-weight relationship was determined for   males   (logw  =  -1.3122 +  2.333   log  L), females (logw=-1.70195+2.7238 logL), immature (logW=-2. 10597+3.0806 log L) and for total fish (log w=-2.0763+3.0557 log L). Condition factor for females (k=1.023) was higher than that for males (k=0.997). Age was estimated from length frequency data by Bhattacharya’s method (1967) Von Bertalanffy growth parameters were L∞=15.9 cm, K=0.3614 y-1, t0=0.6313 y-1 and w∞=39.27 gm. The individuals of this species live for about 3 years and the second age dominate the population. the growth performance index in length (φ2=4.3643). Estimated total, natural, fishing mortality rates and exploitation rate were (z=1.0374 y-1, M=0.9797 y-1, F=0.0577 y-1 and E=0.3797 respectively).}, keywords = {Terapon puta,Fishery biology Mediterranean,Damietta,Port Said}, url = {https://ejabf.journals.ekb.eg/article_26580.html}, eprint = {https://ejabf.journals.ekb.eg/article_26580_266a08a179366049a1e757d6ab39c42f.pdf} } @article { author = {H. Abu Almaaty, Ali and A. H. El-kady, Mohamed and A. A. Mansour, Hala}, title = {Differential expression of aromatase genes as a stress response of different levels of salinity treatments in the Nile Tilapia, Oreochromis niloticus}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {205-215}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.27295}, abstract = {This is the first study on the effects of salinity as a stress on the differential expression of the aromatases (CYP19 a & b) in the Nile tilapia (Oreochromis niloticus) tissues (ovary, testis and brain of female). The experiment was conducted to study the effects of five different salinity levels (10‰, 15‰, 20‰, 25‰ and 30‰) as a stress on the expression of aromatase genes. The fish were transferred gradually from lower concentration to higher concentration of salinity for adaptation. The results of the expression of CYP19a in the gonads of O. niloticus as a response to the stress of salinity revealed the positive correlation between salinity and the relative CYP19a expression in the ovaries and testes of all treatments with marked higher values in ovaries than testes and this can be ranked in the order: 30‰ > 25‰ > 20‰ > 15‰ > 10‰. With the increase of salinity levels, the relative CYP19a expression in the ovaries varied from 0.8 with the treatment of 10‰ to 7.58 with that of 30‰, while the expression in the testes ranged from 0.65 to 3.48 respectively. Similarly, the direct relationship was observed between the relative expression of CYP19b in the brain of females (0.026 to 0.037) and the increasing levels of salinity.}, keywords = {Oreochromis niloticus,salinity,Stress,Aromatase gene,CYP19}, url = {https://ejabf.journals.ekb.eg/article_27295.html}, eprint = {https://ejabf.journals.ekb.eg/article_27295_d343728ded8d971706ff79de0a54dfc3.pdf} } @article { author = {Ibrahim Rizkalla, Samir and Ali Heneish, Rasha}, title = {A comparative study on the morphometric characters of the first recorded west African Spanish mackerel Scomberomorus tritor (Cuvier, 1832) and the Red Sea migrant narrow barred Spanish mackerel Scomberomorus commerson (Lacepsde, 1800) family: Scombridae in the Egyptian Mediterranean waters (off Abu- Qir).}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {217-222}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26686}, abstract = {Three fishes of genus Scomberomorus (family: Scombridae) were observed among the catch of pelagic fish (Sardinella aurita, Sardinella maderensis, trachurus mediterraneus and Engraulis encrasicolus) obtained by pure seine net using light operated in the Egyptian Mediterranean waters (off Abu- Qir). Two fish were recorded for the first time of West African Spanish mackerel (Scombermorus tritor; Cuvier, 1832); the third was the migrated red sea species into the Mediterranean Sea(Scombermorus commerson; laceped, 1800). By comparing the morphometric characters of both species having the same length (TL: 41.0 cm.); it was found that they have the same meristic counts, but differing in about 10 morphometric indices out of 26, where Scombermorus commerson have greater values than Scombermorus tritor. Generally, the external features of the bodies of the two species are the main difference between them, as Scombermorus tritor have about 40 black rounded spots around the lateral line, while Scombermorus commerson have about 16 vertical bars below the first, and second dorsal fin followed by about twenty black rounded spots extended behind till caudal fin.   }, keywords = {Morphometric characters,Scombermorus tritor,S. commerson Mediterranean Sea,Red Sea,Egypt}, url = {https://ejabf.journals.ekb.eg/article_26686.html}, eprint = {https://ejabf.journals.ekb.eg/article_26686_2ae7cd47676d6d48e2a2edd245cbe2a0.pdf} } @article { author = {M. Osman, Hanan and A. El Ganainy, Azza and M. Amin, Amal}, title = {A study on Diet Composition and Feeding Habits of Barracuda fish (Sphyraena chrysotaenia and S. flavicauda) in the Gulf of Suez}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {223-232}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26694}, abstract = {The most common and commercial species of Family Sphyraenidae in the Gulf of Suezare Sphyraena chrysotaenia and S. flavicauda. A total of 865 individuals of S. chrysotaenia and 71 individuals of S. flavicauda were collected for food and feeding studies. The feeding intensity estimated as full stomach percent were represented by 37% and 59.2%, while the empty stomach were represented by 63% and 40.8% for S. chrysotaenia and S. flavicauda respectively. The relative length of gut indicated that both species were carnivorous as RLG= 0.29 and 0.15 for S. chrysotaenia and S. flavicauda respectively. The fullness index for the two species showed seasonal variations, as the highest fullness percent were recorded during winter, where the lowest fullness percent was observed during spring for both species. The most important food items for S. chrysotenia were fish with IRI% of 16023.6 followed by crustaceans with IRI% of 1452.36. The most important food items for S. flavicauda were crustaceans followed by fishes then mollusks, where IRI% were 1482, 1429 and 910 respectively. The prey sizes have a positive relationship with length of fish for both species.}, keywords = {Sphyraena chrysotaenia,S. flavicauda,Gulf of Suez,Feeding habits,Diet composition}, url = {https://ejabf.journals.ekb.eg/article_26694.html}, eprint = {https://ejabf.journals.ekb.eg/article_26694_b6eda1da359f07515d5947219d3b6b40.pdf} } @article { author = {A. El-Sherbiny, Mohamed and A. EL-Chaghaby, Ghadir and M. Abd El-Shafea, Yasser}, title = {Treatment of aquaculture waste effluent to be reused in fish culture in Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {233-243}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.27272}, abstract = {Aquaculture is currently the largest source of fish supply in Egypt. However, with this great productivity there has been an obsession with liquid waste and its impact on the environment. The aim of the present work is to make a preliminary trial to evaluate the ability of some low cost materials (sawdust, sawdust ash, granite powder, and crushed granite) to improve the quality of waste effluents resulting from recirculation aquaculture systems, and selecting the most efficient adsorbent to be applied at three different levels to verify which level is the most probable for waste effluent to be reused in fish culture. Total dissolved solids (TDS), electric conductivity (EC), salinity, dissolved oxygen (DO), turbidity, florin (F), chlorine (CL), phosphate (PO4), sulphate (SO4), ammonium (HN4), nitirate (NO3), nitrite (NO2) were the evaluating parameter.  Results from the adsorption experiment showed that the crushed granite was a promising adsorbent for aquaculture wastewater treatment. Accordingly, the effect of using different doses (5g/L, 10g/L and 20g/L) of crushed granite on water quality parameters was assessed and surface characteristics of cracked granite were determined using FTIR spectrophotometer  for surface functional groups identifications, and X-ray diffraction (XRD) for mineralogical composition and nitrogen absorption for surface porous structure and surface area. Results revealed that crushed granite composed mainly of quartz and that 10g/L of crushed granite is the most probable level to be used with waste effluents for recirculation aquaculture systems.}, keywords = {Aquaculture,Effluent,Reused,environment,adsorbent,Treatment}, url = {https://ejabf.journals.ekb.eg/article_27272.html}, eprint = {https://ejabf.journals.ekb.eg/article_27272_da229e516ef4c9f5327456f496307710.pdf} } @article { author = {Elijah Olusegun, Ajiboye, and Festus Idowu, Adeosun, and Mavis Titilayo Oghenebrorhie, Oghenochuko,}, title = {Assessment of fecundity of Brycinus macrolepidotus in Akomoje water reservoir, Abeokuta, South West, Nigeria}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {245-252}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.27278}, abstract = {Overfishing and threat of extinction globally has been a topic of concern in the fisheries sub-sector over the years. This study assessed some aspect of the biology of Brycinus macrolepidotus in Akomoje reservoir, lower River Ogun, Nigeria. A total number of 838 fish specimens were collected bi-monthly for a nine month period from commercial catches using cast nets and long line. A total number of 51 mature female were selected for fecundity analysis which was limited to only sexually gravid female fish. Length and weight of experimental fish were measured. Data were subjected to analysis of variance (ANOVA), descriptive and inferential statistics. Correlation statistics was carried out to ascertain relationship between absolute and relative fecundity with length and weight of fish. Length and weight of experimental fish ranged between 14.5-39.4 cm and 938-1956 g. The relative fecundity ranged between 441 and 3,597 eggs with a mean of 1,702±0.16 eggs while absolute fecundity ranged from 5,838 to 39,208 eggs with a mean of 14,326±0.52 eggs. Strong positive relationship existed between total length and absolute fecundity (r= 0.74), and relative fecundity (r = 0.81). The reproductive potential of the species in this water body showed the ecological suitability of the species to its environments and to its thriving fisheries. The skewed sex ratio observed is an indication of threat to the species abundance in the lower River Ogun.  Therefore, the habitat should be monitored towards sustainable methods of managing the stock in the reservoir.}, keywords = {Brycinus macrolepidotus Akomoje reservoir,fecundity,Abeokuta,Nigeria}, url = {https://ejabf.journals.ekb.eg/article_27278.html}, eprint = {https://ejabf.journals.ekb.eg/article_27278_a8096c56b7d1f0e2bbd9e2b9441ec6b3.pdf} } @article { author = {H. H. Ali, Mohamed and E. Goher, Mohamed and D. G. Al-Afify, Afify}, title = {Kinetics and Adsorption Isotherm Studies of Methylene Blue Photodegradation Under UV Irradiation Using reduced Graphene Oxide- TiO2 Nanocomposite in Different Wastewaters Effluents.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {253-263}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26975}, abstract = {In this study TiO2@rGO nanoparticles was synthesized as an effective photocatalyst. Reduced graphene oxide (rGO) was mixed with TiO2 with different doping ratio (1%, 3% and 5% wt) and utilized to remove MB dye as organic pollutants from different wastewater effluents and also from aqueous solution. The impacts of different factors, e.g. pH of solution, contact time, photocatalyst dose and initial MB dye concentration on the removal efficiency were studied. The results showed that the highest MB degradation occurred at pH 9, contact time = 120 min, dose of photocatalyst of 0.75 g/L at 30 mg/l dye concentration. Also, the prepared nanocomposites success in reducing COD values of wastewater in the range of 30 – 89.1 %. Moreover, the data of kinetics studies indicated that the adsorption process well obeys the pseudo-second order reaction model with qe values ranged between 14.28 – 19.37 mg/L. Langmuir isotherm model well describes the behavior of adsorption behavior than Freundlich Model. }, keywords = {Photodegradation,COD,Nanoparticles,Reduced Graphene oxide,MB dye,Wastewaters}, url = {https://ejabf.journals.ekb.eg/article_26975.html}, eprint = {https://ejabf.journals.ekb.eg/article_26975_fc9ebfd4bc1a18012b4a084c6eeb9a33.pdf} } @article { author = {S. Mossalem, Hanan and M. Mansour, Shereen}, title = {Effect of Propofol Fresensius 1% on nervous system ultrastructure of Biomphalaria alexandrina.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {265-274}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28517}, abstract = {This study was aimed to evaluate the effect of propofol fresensius 1% on the nervous system of Biomphalaria alexandrina snails, which represent the intermediate host of schistosoma mansoni after acute exposure (5ml/L) for 24 hours and chronic exposure (1ml/L) for 72 h, using scanning and transmission electron microscope. After chronic exposure, visceral ganglion was observed compressed and elongated, not paired with pedal ganglia and its nerves did not contact with it. 1ml/L propofol completely blocked synaptogenesis between visceral and pedal neurons. After acute exposure, the varicosities have few granular vesicles, whereas in the chronic exposure, the varicosities were empty and no granular vesicles were found inside it. Poorly developed endoplasmic reticulum, few Golgi bodies, elongated mitochondria, and more intercellular connective space were observed. }, keywords = {Propofol fresensius Nervous system,Biomphalaria alexandrina,Bioindicator,Golgi bodies}, url = {https://ejabf.journals.ekb.eg/article_28517.html}, eprint = {https://ejabf.journals.ekb.eg/article_28517_8580b94c283e1059caf692f70cffc81e.pdf} } @article { author = {A. M. Mahmoud, Mostafa}, title = {Effects of single and combined seaweeds diets on growth performance and ammonia-nitrogen production of the sea cucumber Holothuria impatiens Forskaal, 1775}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {275-284}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.26981}, abstract = {This study investigates the effects of single and combined seaweeds diets on growth performance and ammonia-nitrogen production of the sea cucumber Holothuria impatiens under controlled laboratory conditions. Three naturally available seaweeds Caulerpa racemosa, Cystoseira indica and Jania rubens were used to feed sea cucumber juveniles, which averaged 6.09 g in weight at the beginning of the experiments. Generally, growth rate were faster in combined algae than in single algae diets. Specific growth rate (SGR) and relative weight gain (RWG) of sea cucumber fed the combined diet C. indica and C. racemosa (0.7%d-1 and 5.9 %w-1 respectively) were significantly higher than that of sea cucumber fed the other diets (P<0.05). The lowest SGR and relative weight gain (RWG) were observed in sea cucumber fed the J. rubens diet. The highest value of ammonia-nitrogen production was 1.6 mg/L in H. impatiens fed J. rubens diet but the lowest value was 0.56 mg/L in C. indica and C. racemosa diet. Therefore, this study indicates that C. indica and C. racemosa are optimum seaweeds for use in the culture of the commercially valuable sea cucumber H. impatiens.}, keywords = {Sea cucumber,Holothuria impatiens,Seaweeds,Caulerpa racemosa,Cystoseira indica,Jania rubens,growth rate}, url = {https://ejabf.journals.ekb.eg/article_26981.html}, eprint = {https://ejabf.journals.ekb.eg/article_26981_6845ecb8e891875bb18aedcaf37facb7.pdf} } @article { author = {H. Abdel-Kader, Heba and H. Mourad, Mohamed}, title = {Impact of Heavy Metals on Physiological and Histopathological Parameters in the Catfish Clarias gariepinus From Lake Maryout, Alexandria, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {285-298}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28010}, abstract = {This study was carried out to assess the accumulation and distribution of heavy metals (Pb, Hg, Cd, and As) in Lake Maryout. The impact of heavy metal contaminations was also assessed in different target tissues (gills, liver, kidney, and muscles) of Clarias gariepinus (C. gariepinus) using physiological and histopathological parameters in the Main Basin and a relatively clean area (South-west Basin). Heavy metals concentration in water showed that Main Basin had the highest levels of Pb, Hg, As and Cd metals. The abundance of heavy metals in different fish organs; gills, livers, kidney, and muscles followed the order: Pb> Cd >As >Hg. Fish muscle compared to other tissues; usually, contain the lowest level of metals. Physiological alterations showed a significant severe anaemia, leukocytosis, neutrophilia, lymphopenia, and monocytosis was detected in fish collected from Main Basin in comparison to South-west Basin. Moreover, a significant increase in serum ALT, AST and creatinine were observed, while serum urea showed insignificant decreased in fish collected from Main Basin in comparison to South-west Basin. Histopathological alterations of gills showed lamellar fusion and hypertrophy of epithelial cells. Liver samples included necrosis of hepatocytes. Finally, kidney pathologies demonstrated the glomeruli appeared shrunken, desquamated, and vacuolated and often destroyed tubular epithelium. The mean fish intake of adults provides exposure to metals that fall within the accepted standards for the safe intake. It is recommended that the situation need a scientific method of detoxification to improve the health of this Lake and economic fish.}, keywords = {Heavy Metals Accumulation,Haematology,biochemistry,histopathology,Clarias gariepinus,Lake Maryout}, url = {https://ejabf.journals.ekb.eg/article_28010.html}, eprint = {https://ejabf.journals.ekb.eg/article_28010_48b7f37034e77d4970358d8d1050a460.pdf} } @article { author = {M. Sallam, A. and El Hriri, M. and A. Mahmoud, M. and El-Jakee, J.}, title = {Bacterial diversity and distribution in Soft Corals and Sponges in the Red Sea}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {299-304}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28097}, abstract = {The Red Sea has high biodiversity, with at least 266 coral and sponge species. The coral/Sponge holobiont is comprised of the coral/sponge animal and its associated microorganisms consisting of bacteria, archaea, fungi and viruses. It has been hypothesized that this interaction plays a role in coral/ sponge defense. This study aims to study the bio-diversity of some collected types of sponge and soft coral from Red Sea and to isolate associated bacteria from them. The result includes five types of sponges; Ircinia strobilina, Callyspongia viridis, Suberea spp., Spongia officinalis and Biemna ehrenbergi   and five types of soft corals; Heteroxenia fuscescens, Didemnum moseleyi, Lobophytum pauciflorum, Sarcophyton trocheliophorum and Sinularia spp. Twenty two bacterial isolates were isolated from the sponges with 41 % and thirty two bacterial isolates were isolated from soft coral samples with 59 % collected from different Red Sea areas.}, keywords = {Bacteria,diversity,Soft corals,Sponges,Red Sea}, url = {https://ejabf.journals.ekb.eg/article_28097.html}, eprint = {https://ejabf.journals.ekb.eg/article_28097_3d698d2c4098a907bf52d3d1f550e692.pdf} } @article { author = {Saleh, Hosam and Gabr Ali, Nadia and M. Aboyadak, Ibrahim and Saber, Nadia}, title = {Subcellular degenerative changes in hepatopancreas and posterior kidney of Streptococcus iniae infected Nile tilapia using Transmission Electron Microscope}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {305-316}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {}, abstract = {Streptococcosis became one of the most dangerous bacterial diseases affects cultured marine and freshwater fish. In the present study Streptococcus iniae was isolated from diseased Nile tilapia (Oreochromis niloticus) with investigation of the clinical signs, post mortem lesions and focusing on the histopathological changes in liver and kidney using the light and Transmission Electron Microscope (TEM). Natural infected O. niloticus showed ascites, exophthalmia, presence of hemorrhagic patches all over the external body surface with inflammation and swelling of the anal opening. Post-mortem examination indicated presence of hepatomegaly, splenomegaly, congestion and swelling of posterior kidney. Four Streptococcus iniae isolates were recovered and identified using PCR from the examined fish. The LD50-96h of the recovered isolates in experimentally infected Oreochromis niloticus were ranged between 0.2 ml of  2.62 – 3 × 107 CFU/ml by intraperitoneal injection. Under the light microscopical examination, severe degenerative changes were present in the hepatopancreas including diffused hepatic cell vacuolation and necrosis, leukocytic infiltration, the posterior kidney tissue showed vacuolation of tubular epithelial cells, shrinkage of glomerular taught and increasing the Bowman''s space. TEM examination of hepatopancreas revealed the presence of hepatocellular degeneration, increased vacuolation in the different areas of the cytoplasm, loss of endoplasmic reticulum contact in several areas. Kidney tissues showed numerous vacuolation, swollen of cuboidal epithelial cell with absence of brush border in the apical portion of the proximal convoluted tubules, nucleus and mitochondria were dispersed throughout the cytoplasm.}, keywords = {Streptococcus iniae,Oreochromis niloticus,TEM, histopathology,PCR,LD50-96 h,pathogenicity}, url = {https://ejabf.journals.ekb.eg/article_28099.html}, eprint = {https://ejabf.journals.ekb.eg/article_28099_215030df716a9e39cf6bb9e2ac2a350e.pdf} } @article { author = {M. El-Manawy, Islam and Z. Nassar, Mohamed and M. Fahmy, Nayer and H. Rashedy, Sarah}, title = {Evaluation of proximate composition, antioxidant and antimicrobial activities of some seaweeds from the Red Sea coast, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {317-329}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.30541}, abstract = {Nutritional composition, total Phenolic content, antioxidant and antimicrobial activities were assessed in the crude extracts of six seaweed species selected from the Red Sea coast, Hurghada, Egypt. These species are Caulerpa racemosa var. gracilis from Chlorophyta; Padina boergesenii, Polycladia myrica, Hormophysa cuneiformis and Sargassum aquifolium from Phaeophyta and Digenea simplex from Rhodophyta. The results of nutritional content revealed that, the tested seaweeds have high values of fibers (27.6-36.2% dry wt.), ash (24.7–35.8% dry wt.), and carbohydrates (23.4-35.7% dry wt.), medium values of moisture (2.4-10.8% dry wt.) and protein (4.8-7.1% dry wt.), while low values of total lipids (0.8-5.2% dry wt.) were detected.  The highest total phenolic content (129.9 ± 1.8 mg GAE/g dry wt.) was detected in the brown seaweed, H. cuneiformis, and the lowest (31.3 ± 0.6 mg GAE/g dry wt.) was observed in the green seaweed C. racemosa. The antioxidant activity was detected using DPPH (2, 2-Diphenyl-2-picrylhydrazyl) radical scavenging activity and the highest activity was recorded in the brown seaweed H. cuneiformis, while the lowest activity was observed in the green seaweed C. racemosa. All the algal extracts were effective against Pseudomonas aeruginosa and Candida albicans, while the extract of H. cuneiformis is the only one that effective against Enterococcus faecalis and Staphylococcus aureus. None of the tested extracts was effective against Aspergillus niger. Overall, the results of this study indicated that the Red Sea seaweeds could be introduced as raw materials or some of their contents for nutrient supplementation in various food products.}, keywords = {Red Sea Seaweeds,nutritional composition,antioxidant,Antimicrobial,phenolic content}, url = {https://ejabf.journals.ekb.eg/article_30541.html}, eprint = {https://ejabf.journals.ekb.eg/article_30541_64dd95f5c23c3c133ecfb8fa1f8238e2.pdf} } @article { author = {S. Abd El-Naby, Ahmed and El-Ganainy, Azza and A. Mohamed, Maaly and El-Mor, Mohammad}, title = {A study on by-catch of experimental Beach Sein in Ras Sader, North Suez Gulf, Egypt.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {331-339}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28461}, abstract = {The by-catch of the experimental beach seine operating in Ras Sader coast, north Gulf of Suez during the period from autumn 2017 to summer 2018 was investigated. The by-catch amount 3-5 Kg per haul composed of fin fish species (89.6%) and shrimps (10.4%). About 25 fin fish species belong to 16 families; composed of two categories 20 juvenile of the commercially important species (40.6 %) and 5 low valued species (59.4%). Ostorhinchus fasciatus, Apogonichthyoides taeniatus, Leiogn-athus berbis, Leiognathus elongates, Encrasicholina punctifer, Nemipterus japonicus and Trachurus indicus dominated the assemblage of 25 species and contributed 73.1% of all sampled fishes. About 34.4% of juvenile of the commercially important species were recruitment in spring; 30.1% in summer 2018, 19.7% in autumn 2017 and 15.7% in winter.}, keywords = {by-catch,Ras Sader,Beach Seine,North Gulf of Suez}, url = {https://ejabf.journals.ekb.eg/article_28461.html}, eprint = {https://ejabf.journals.ekb.eg/article_28461_3e5006c6a7917949e1c4cd4f4b58f337.pdf} } @article { author = {D. G. Al-Afify, Afify and M. Tahoun, Usama and H. Abdo, Mohammed}, title = {Water Quality Index and Microbial Assessment of Lake Qarun, El-Batts and El-Wadi Drains, Fayoum Province, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {341-357}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28270}, abstract = {This study was carried out on Lake Qarun and 2 drains (El-Batts and El-Wadi) that discharging wastewater into it, at Fayoum Province, Egypt,  to assess the Water Quality Index (WQI) and miicrobial loadof their waters. This investigation was conducted during the period from autumn 2017 to summer 2018. The general annual averages of WQI values of Lake Water were poor for irrigation (69.61) and very poor for aquatic life (78.53). El-Batts and El-Wadi Drains were poor both for irrigation (55.45) and for aquatic life (54.45). Moreover, total viable bacteria count (TVBC) at 22°C ranged between 3 ×103 CFU/ml and 450 × 103 CFU/ml, and  the TVBC at 37°C varied from 0.4 ×103 CFU/ml to  330 ×103 CFU/ml .  Total coliform (TC) in the range of 0.3 ×103 - 46 × 103 MPN /100ml water , Fecal coliform (FC) in the range of 3×102- 460× 102 MPN /100ml water . Fecal streptococci (FS) in the range of 3 × 102 - 1100 × 102 MPN/ 100ml water and the numbers of E.coli fluctuated between 0.1×102 and 60 × 102 CFU /100ml water. The obtained values of physical, chemical and microbial parameters of Lake and drains water were compared with the standard values set by FAO (1994)for irrigationand CCME (2007) for aquatic life. It was found that the values of tested parameters were higher than the recommended standards and this affects the biota in the studied area and  is expected to cause healthy problems.}, keywords = {Lake Qarun,El-Batts,El-Wadi Drains,Water quality index,Microbial assessment,Egypt}, url = {https://ejabf.journals.ekb.eg/article_28270.html}, eprint = {https://ejabf.journals.ekb.eg/article_28270_c2237115ebf7c8e064c0bcdc076d7fc7.pdf} } @article { author = {S. Mostafa, Soha and S. El-Hassanin, Adel and Sh. Soliman, Amira and Rashad, Sayed and A. El-Chaghaby, Ghadir}, title = {Microalgae growth in effluents from olive oil industry for biomass production and decreasing phenolics content of wastewater}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {359-365}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28265}, abstract = {The present study investigates the possibility of growing microalgae in wastewater generated from olive oil production factory. Wastewater samples were collected from the three stages of olive oil production as well as from the final effluent of the factory. The analysis results of the effluent revealed that it contains: nitrogen (0.31%), phosphorus (0.59%), potassium (0.70%), calcium (741ppm), iron (59.78 ppm), magnesium (301 ppm), cupper (5.45 ppm), sulfur (314 ppm) and high amount of phenolic compounds (2999.4 mg /L). Nostoc muscorum, Anabaena oryzae and Spirulina platensis were chosen as three blue-green microalgae and were cultivated in standard media and two media from olive oil industry effluents. The three microalgae were cultivated over 30 days period on olive effluent (OWW) and diluted effluent (OWW 50%). The growth of the three strains in diluted media OWW50% showed better results as expressed from the total chlorophyll, optical density and biomass dry weight. The total chlorophyll content values of Spirulina, Anabaena and Nostoc genera were 2.3, 1.87 and 1.87µg/L, respectively. Dry weights obtained in diluted OWW50% were 1.72, 1.45 and 1.28g/L for Spirulina, Anabaena and Nostoc, respectively. The values of optical density were 0.38 for Spirulina, 0.29 for Anabena and 0.25 in case of Nostoc. During algae cultivation, the initial phenols concentration was reduced by 50-60% in 15 days, and more than 80% of phenols were removed by day 30. Thus blue-green microalgae could be grown on olive oil wastewater for biomass production and wastewater treatment of phenolic compounds.}, keywords = {Blue-green algae,Cyanobacteria,Treatment,Phenol,olive oil,Wastewater}, url = {https://ejabf.journals.ekb.eg/article_28265.html}, eprint = {https://ejabf.journals.ekb.eg/article_28265_6553042e6ccce8dc31b4af4b5e2806fe.pdf} } @article { author = {D.G. Al-Afify, Afify and Y. M. Aly, Mohamed}, title = {Application of Nile Chemical Pollution Index to evaluate the quality of water for drinking and agricultural purposes on Bahr Yusuf Branch, River Nile, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {367-379}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28750}, abstract = {Bahr Yusuf is one of the most important branches of the River Nile in Egypt, being the main source of drinking and irrigation waters for many cities. Nile Chemical Pollution Index (NCPI) was estimated to assess the quality of such waters. Water samples were collected from 6 locations along the canal in El-Minia and El-Fayoum Governorates. Seven chemical parameters were determined including dissolved oxygen (DO), biological oxygen demand (BOD), ammonia (NH3), total dissolved solids (TDS), total suspended solids (TSS), nitrate (NO3-) and ortho-phosphorus (PO4-3). Results indicated that all the tested parameters were within the permissible limits of both the Egyptian and WHO standards for drinking water and FAO standards for irrigation water. The NCPI records ranged from 13-19 indicating clean (less than 15) to slightly polluted (16-20) waters. Classification of water based on electrical conductivity illustrates that the canal water belongs to medium salinity class (C2). The total hardness concentrations were belonging to medium hard to hard category except one very hard category. The SAR estimates were excellent (S1), PI were class II category, RSC were safe/good to marginal/doubtful and Na% were good (20 – 40) to permissible (40 - 60), PS were classified as “excellent to good” (<5 meq/l) to “good to injurious” category (5-10 meq/l). In addition, the balance error % were less than the allowed error, KR were < 1.0. So, all the samples are acceptable, indicating their suitability for drinking and irrigation purposes.  }, keywords = {Nile Chemical Pollution Index (NCPI),Bahr Yusuf Canal,River Nile}, url = {https://ejabf.journals.ekb.eg/article_28750.html}, eprint = {https://ejabf.journals.ekb.eg/article_28750_3e60ac94f82fb26710421788bd389799.pdf} } @article { author = {M. Mazrouh, Marwa and H. Mourad, Mohamed}, title = {Biochemical Composition and Bioaccumulation of Heavy Metals in Some Seafood in the Mediterranean Coast of Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {381-390}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28684}, abstract = {The main objective of this study is to investigate the variation between biochemical compositions and bioaccumulation of some heavy metals in edible muscle of commercially important seafood, crustacean (Peneaus japonica), cuttlefish (Sepia vulgaris), mussels (Donax trunculatus) and oyster (Tapes decussates and Paphia undulata) as an attempt to rank them as an alternative rich animal energy source for human and to determine if consumers are at risk of consuming this seafood. The mean values of body constituents differed significantly (P<0.05) among various seafood species. The recorded data declare that the highest caloric content was observed in the following order: Peneaus japonica > Paphia undulata >Tapes decussates > Sepia vulgaris > D. trunculatus. On the other hand, the average concentrations of heavy metals in muscle decreased in the following order: Pb > Cd > As > Hg > Al µg/g wet weight. Moreover, MPI values suggested that D. trunculatus and P. undulata have a greater capacity for metal bioaccumulation than P. japonica and T. decussates while S. vulgaris had the lowest value. The present study confirmed that the investigate seafood species was safe within the limits for human consumption. So it is recommended that more research and assessment of seafood quality is needed to provide more data and help safeguard the health of human.       }, keywords = {Seafood,Heavy metals,body composition,Pollution index,Human risk assessment}, url = {https://ejabf.journals.ekb.eg/article_28684.html}, eprint = {https://ejabf.journals.ekb.eg/article_28684_055e2057227e52530e8ec256ae034e3c.pdf} } @article { author = {F.I., Adeosun,}, title = {The fishes of akomoje reservoir drainage basin in lower River Ogun, Nigeria: Diversity and Abundance}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {391-402}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.28735}, abstract = {Fish species composition, abundance, and diversity of Akomoje reservoir drainage basin in Lower River Ogun, Nigeria were studied from June to November, 2017. Water quality parameters were also monitored in-situ and ex-situ using standard methods and kit. One thousand and twelve fish specimen comprising of 14 fish species from 9 families were identified. The Bagrids were the most abundant fish family in the reservoir basin and Chrysichtys nigrodigitatus constituted the most dominant (60.28 %) species and Schilbe mystus was the least abundant species by number (0.59%) and weight (0.74%).. other common species included T. zilli, O. niloticus, C. gariepinus, C. auratus and Malapterurus electricus representing 91.3% while Synodontis budgetti,  Tilapia mariae, Schilbe mystus and S. schall etc. constituted occasional (6.53%) and rare (2.17%) species Diversity indices estimates were Simpson’s Index (D) = 0.39, Simpson’s Index of diversity (1-D) = 0.61, Simpson’s Reciprocal Index (1/D) = 2.56, Shannon-Diversity Index (H) = -1.5749, Shannon’s equitability (EH) or Evenness (E) of = -0.5968. Results of physical and chemical parameters measured were air temperature (29.23±1.27), water temperature (26.9±0.370C), dissolved oxygen (6.12±0.70mg/l), and pH (7.6±0.39). There was no significant difference (p> 0.05) in temperature, BOD and phosphorus all though the study period. Negative correlation was determined between water quality parameters and between water quality parameters and fish abundance. The study concluded that the water quality parameters of the study location measured were still within tolerable range for fish survival, however, with the negative correlation obtained between fish abundance and water quality parameters, human activities around this river should be monitored to prevent pollution of the water body. The fish population of this river basin has been well depleted and thus more attention should be paid to the resource to prevent extinction of important fish species.}, keywords = {Akomoje Reservoir,River Ogun,Fish abundance,water quality parameters,diversity}, url = {https://ejabf.journals.ekb.eg/article_28735.html}, eprint = {https://ejabf.journals.ekb.eg/article_28735_e55166ef7cf4b448c85f0a4dfdc3fcb9.pdf} } @article { author = {A. O. El- Aiatt, Attia and A. Sh. Shalloof, Kariman and M. El- Far, Alaa}, title = {Reproductive Biology of the Common Sole, Solea solea in Southern East Mediterranean, Bardawil Lagoon, Egypt}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {403-411}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2019.29183}, abstract = {Annual production of soles in Bardawil Lagoon was gradually decreased from 343 MT in 2008 to be 161 MT in 2016. This work aims to investigate reproductive biology of the common sole, Solea solea, to provide biological base for management of its fisheries in Bardawil Lagoon, North Sinai, Egypt. Monthly samples of S. solea were collected from the commercial catch in different landing sites of the lagoon during 2016-2017. The length-weight relation was found as W= 0.0055 L3.171, W= 0.0047 L2.334 and W= 0.0048 L3.2215 for males, females and combined sexes respectivly. Generally, low values of condition factors were recorded in June and July, and the highest value was recorded in December. Gonado-Somatic Index (GSI) of females showed that S. solea spawn during November, December and January since GSI peaked in these months (6.77, 8.72 and 8.48 % respectively). The lowest value of GSI of females was recorded in August (1.09%). Overall sex ratio (males : females) was 1: 1.99 during the period of study. Lengths at first sexual maturity (Lm) were determined as 19.8 and 20.1 cm for males and females respectively. The absolute fecundity (F) was increasing with the fish length and described by a power equation: F= 7.0918 L3.6374. The relative fecundity gradually increased from 8092.5 to 36680.6 eggs per cm (average 20766.6 eggs/ cm). To protect and maintain the stock of common sole in Bardawil Lagoon, it is recommended to ban using fishing nets of illegal mesh sizes and other destructive fishing methods which catch small fish sizes, length at first capture should be larger than length at first sexual maturity (> 20.1 cm) and ban fishing nets targeting soles during its spawning season (from November to January).}, keywords = {Solea solea,Bardawil Lagoon,Mediterranean,Reproduction,Management,Fisheries}, url = {https://ejabf.journals.ekb.eg/article_29183.html}, eprint = {https://ejabf.journals.ekb.eg/article_29183_5976cdae2371ae0f475f4af94e7d436c.pdf} } @article { author = {F. Ayoub, Hala and F. Abdelghany, Mohamed and B. El-Sayed, Abo El-Khair}, title = {Effects of Diatoms Amphora coffeaeformis on growth parameters, non specific immunity and protection of the Nile tilapia (Oreochromis niloticus) to Aeromonas hydrophila infection}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {23}, number = {1}, pages = {413-426}, year = {2019}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {}, abstract = {Eight weeks feeding trial was carried out to assess the growth promoting and the immune-stimulatory effects of the supplementation of Amphora coffeaeformis (A. coffeaeformis) in the Nile tilapia diets and its resistance to bacterial infections. Fish were fed on diet containing  0, 10, 20 and 30 g of A. coffeaeformis per kg . Growth performance parameters and body composition of experimental fish were evaluated. Serum protein profile (albumin, globulin, total protein and A/G ratio), serum liver function enzymes, and serum lysozyme were assessed. Therefore, fish in all the experimental groups were challenged with pathogenic Aeromonas hydrophila following the feeding experiment. The results showed that the growth-promoting influence of A. coffeaeformis was observed on Nile tilapia performance, the optimum growth and feed utilization were obtained at fish maintained on 10g A. coffeaeformis kg-1 diet. A. coffeaeformis supplementation improved the protein and lipid contents in fish bodies without significant differences among them, especially when fed 20 or 30 g per kg, while no significant differences in the moisture and ash contents were observed among different treatments. As well, the physiological parameters (serum protein profile and serum lysozyme) were improved when fish were fed on A. coffeaeformis enriched diet. Besides, lysozyme activity was giving good results in 10, 20 and 30 g per kg. Fish mortality after challenged against A. hydrophila decreased with increasing A. coffeaeformis level in fish diets. These results indicated that A. coffeaeformis supplement is promising as an alternative method to antibiotics for disease prevention in Nile tilapia culture, and the optimum level of A. coffeaeformis in the fish diet should be ranged between  10 to 20 g kg-1 diet.}, keywords = {Amphora coffeaeformis,Nile tilapia,Growth performance,Non-specific immunity,Aeromonas hydrophilia}, url = {https://ejabf.journals.ekb.eg/article_37466.html}, eprint = {https://ejabf.journals.ekb.eg/article_37466_a5078ce04976e33a3376af401b5b7cdd.pdf} }