The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
09
27
Floating macrophytes efficiency for removing of heavy metals and phenol from wastewaters
1
9
EN
Elsayed
M. Ali Nafea
10.21608/ejabf.2019.50020
This study evaluates the use of free floating aquatic macrophytes <em>(Lemna gibba</em> L., Lemnaceae. and <em>Pistia stratiotes</em> L., Araceae) for the treatment and purification of waste polluted water in a laboratory experiment. The results revealed that<em> Lemna gibba</em> L. has a higher removal efficiency reached to about 88 % for the tested heavy metals and phenol from the waste polluted water, while <em>Pistia stratiotes</em> L. has a removal efficiency reached to about 83% for heavy metals and phenol. They are considered good models in assessing Eco- toxicity and efficiency for toxins removal from polluted environment and wastewater purification and treatment.
macrophytes,Lemna gibba,Pistia stratiotes,Phenol,Wastewater treatment
https://ejabf.journals.ekb.eg/article_50020.html
https://ejabf.journals.ekb.eg/article_50020_93ca2a69628b040838ac744573567fac.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
08
Relationships between fish and otolith dimensions of Epinephelus summana (Forsskål, 1775) and Cephalopholis argus (Schneider, 1801) from the Egyptian Red Sea coast
11
21
EN
Sahar
F. Mehanna
Yassein
A. A. Osman
Arafa
Hassan
Magdy
T. Khalil
10.21608/ejabf.2019.52417
Otolith morphology analysis is one of the main tools used for fish or stock identification. Moreover, it is used in the stomach content studies for the identification of prey fish and their size according to the relationship between fish and otolith sizes. In the present study, the relationships between fish length and otolith morphological dimensions were investigated for Epinephelus summana (Forsskål, 1775) and Cephalopholis argus (Schneider, 1801) (family: Serranidae). A total of 170 E. summana and 154 E. argus (i.e 340 and 308 sagittal otoliths for E. summana and E. argus respectively) were sampled from the coast of the Egyptian Red Sea off Shalateen fishing ground. The statistical analysis was done by generalized linear models for the relationship between body length and weight and otolith morphology descriptors (length, width, area and perimeter) and shape indices (Aspect ratio, Compactness, rectangularity, Sulcus and Ostium). The results revealed that there is significantly correlation between the TL of fish and the eleven morphology descriptors and shape indices, where the side effect was p<0.05. Also, this study added new information for the region because of the lack of data for the relationships between otolith morphometric and fish length.
Otolith morphology,Epinephelus summana,Cephalopholis argus,Egyptian Red Sea
https://ejabf.journals.ekb.eg/article_52417.html
https://ejabf.journals.ekb.eg/article_52417_31f926a96564369b4d009bb0dcd3bacf.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Utilization of Ginger Extract in Nile Tilapia (Oreochromis niloticus) Diets
23
37
EN
Saad
M. Alsaiad
Faculty of Agriculture, Al-Azhar University, Nasr City, Cairo, Egypt.
Ahmed
M. AL-Zayat
Faculty of Agriculture, Al-Azhar University, Nasr City, Cairo, Egypt.
10.21608/ejabf.2019.61969
A feeding trial was carried out to study the effect of dietary inclusion of<br />different levels of ginger on growth performance, feed, nutrient utilization,<br />body composition and cost benefit analysis of the Nile tilapia. Nine hapa<br />(3×3×1 m3) were used, each was stocked with 50 fish (overage initial weight<br />10 g/fish). Nine experimental diets were formulated to contain (0.5 and 10%<br />of ginger extract protein instead of soybean meal protein). All the diets were<br />isonitrogenous (30% protein) and isocaloric (4500 Kcal/kg) diet, gross<br />energy. Fish were fed on the experimental diets at a rate of 5% of their body<br />weight daily for 16 weeks. The feed amount was given at two times daily.<br />Nile tilapia fed the diet containing (1%) ginger extract exhibited the best<br />performance, feed conversion, and protein efficiency ratio compared with the<br />control and level 0.5% ginger in fish diets. The body composition was not<br />affected by ginger extract up to 0.5% inclusion level. However, the higher<br />level of ginger inclusion caused high protein and low lipid contents of fish<br />body than the control diet. Cost benefit analysis showed high profil index and<br />low incidence cost with the ginger inclusion in the diets.
Nile tilapia,Feed additives,Ginger extract,Growth performance,Cost benefit
https://ejabf.journals.ekb.eg/article_61969.html
https://ejabf.journals.ekb.eg/article_61969_3ab2341016ad0f5f148fd5c280b6170b.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Ecological performance of Ludwigia stolonifera ( Guill . & Perr. ) P.H. Raven under different pollution loads
39
50
EN
El-Sayed
M. Ali Nafea
10.21608/ejabf.2019.50015
This study was conducted to assess the ecological performance of the aquatic macrophyte <em>Ludwigia stolonifera</em> ( Guill . Perr. ) P.H., family Onagraceae in three water habitats under different pollution loads. This emergent hydrophyte can grow and tolerate a wide range of habitats with different pollution levels (ecological plasticity) and produces high biomass (458g.dry wt. /m<sup>2</sup>) in autumn at site C and (400 g. dry wt. /m<sup>2</sup>) at site A, this indicated the survival in autumn across the year, while the lowest biomass was produced in winter season at site A (180 g. dry wt. /m<sup>2</sup>). The plant can absorb and accumulate heavy metals in its tissues with high concentrations, especially in spring and so it could be taken as a good bioindicator for pollution and used in bioremoval of heavy metals from polluted water.
Ludwigia stolonifera,Water Pollution,Bioremoval pollutants,Heavy metals,hydrophytes
https://ejabf.journals.ekb.eg/article_50015.html
https://ejabf.journals.ekb.eg/article_50015_a3dfa87fff915f700afd4e81f3519865.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Antimicrobial and antiviral activity of maggots extracts of Lucilia sericata (Diptera: Calliphoridae)
51
64
EN
Moneer
S. Amer
Ahmed
I. Hasaballah
Kotb
M. Hammad
Ahmed
Z. I. Shehata
Saeed
M. Saeed
10.21608/ejabf.2019.52173
This study was conducted as an attempt to investigate the antimicrobial activity of <em>Lucilia sericata</em> (Diptera: Calliphoridae) maggots whole body extracts produced by different solvents against some bacterial and fungal strains, and also to study the role of <em>L. sericata </em>maggot extracts as antiviral therapeutic agents. Results showed that the highest antibacterial activity was attained by petroleum ether extract 24h post-treatment for both Gram-positive and Gram-negative bacteria either by Microbial Growth Inhibition method or by Minimum Inhibitory Concentration method. Regarding the antifungal activity, all tested extracts showed antifungal activity against tested fungal strains and it may be arranged in descending order as the following: Petroleum Ether> Hexane > Ethyl Acetate > acetone. In addition, the antiviral activity was determined and the maximum non-toxic concentration was 39.06µg/ml. The obtained results explained that petroleum ether extract was effective as anti-HSV with anti-viral activity percent of 92.9. Generally, the available results indicate that <em>L. sericata </em>maggot extracts induced remarkable effects on both antimicrobial and antiviral activities.
Lucilia sericata,antivirus,Antimicrobial,peptides,anti-HSV,maggots
https://ejabf.journals.ekb.eg/article_52173.html
https://ejabf.journals.ekb.eg/article_52173_40500d3828bbb592abb01bc14ce7ef93.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Age and growth, mortality and exploitation ratio of Epinephelus summana (Forsskål, 1775) and Cephalopholis argus (Schneider, 1801) from the Egyptian Red Sea coast, Hurghada fishing area
65
75
EN
Sahar
F. Mehanna
Yassein
A. A. Osman
Magdy
T. Khalil
Arafa
Hassan
10.21608/ejabf.2019.52050
The age and growth of two grouper fish species, Epinephelus summana (Forsskål, 1775) and Cephalopholis argus (Schneider, 1801) from the Egyptian Red Sea off Hurghada, were studied based on the otolith readings. The maximum longevity of the two species was 10 and 6 years for E. summana and C. argus respectively. The age group II was the most dominant age group in the catch forming 46.09 % for E. summana and 22.33% for C. argus from the total collected samples. The asymptotic standard length (L∞) and the growth coefficient (K) were estimated as 63.39 cm and 0.13 year-1 for E. summana and 44.22 cm; and 0.26 year-1 and C. argus, respectively. The total mortality was computed as 0.82 and 1.31 year-1 for E. summana and C. argus, respectively. The mean values of natural mortality were 0.33 and 0.56 year-1 for E. summana and C. argus, respectively. Accordingly, the fishing mortality rates were estimated as 0.49 and 0.75 year-1 for E. summana and C. argus, respectively. The exploitation rates of E. summana (0.6) and C. argus (0.57) along with the fishing mortality rates reflect the overexploitation situation of the two serranid species in the Egyptian Red Sea.
Epinephelus summana,Cephalopholis argus,Red Sea,Age,Growth,mortality
https://ejabf.journals.ekb.eg/article_52050.html
https://ejabf.journals.ekb.eg/article_52050_0557b597e4a44f1667b9da7f6d44e9e2.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
06
European seabass (Dicentrarchus labrax) performance, health status, immune response and intestinal morphology after feeding a mixture of plant proteins-containing diets
77
91
EN
Elham
A. Wassef
Norhan
E. Saleh
Ahmed
M. Ashry
Shaban
Abdel-Momen
Faculty of Agriculture, Al-Azhar University, Nasr City, Cairo, Egypt
Ahmed
M. Al-Zayat
10.21608/ejabf.2019.52408
The feasibility of reducing the fish meal (FM) content, as much as possible, in juvenile seabass diets by using a combination of four plant nutrients (plant mix, PX): soybean meal, SBM; soyprotein concentrate, SPC; corn gluten<strong>,</strong> CG and maize flour, MF was investigated . Seabass (mean initial body weight, 4.74±0.04 g) were fed with one of four isonitrogenous and isolipidic diets formulated to progressively reduce FM concentration of control diet (CTRL), by incorporation the PX, to be 30% (FM30 diet), 25% (FM25 diet), and 20% (FM20 diet) over a 13-week growth period. Fish were fed the experimental diets in triplicate and the resulting effects on growth performance, nutrient utilization, biochemical and amino acid composition, major blood constituents, immunity indicators and intestinal histology were evaluated. At the end of the trial, the FM25-fed fish presented growth, feed utilization, and survival rates comparable (P>0.05) to the CTRL fish. In addition, this diet did not negatively influenced major blood constituents, immunity indicators or intestinal histomorphology. Further dietary FM reduction to 20% (FM20 diet) and elevation of PX inclusion level (~ 59%) have caused a significant (P<0.05)decline in final fish weight, haemoglobin, erythrocyte, leukocyte and lymphocyte counts, elevated leukocytes phagocytic-activityand caused some abnormalities in the proximal intestine (PI) morphological features, but did not negatively impacted haematocrit value, mean erythrocyte cell volume (MCV), mean cellular haemoglobin content (MCH), mean cell haemoglobin concentration (MCHC), monocytes, eosinophils, serum total protein and lysozyme activity. Based on these results, the FM25 formulation (containing approximately 54% PX) can be considered the appropriate for reducing dietary FM down to 25% without compromising the performance, health, immunity or PI morphology of juveniles’ seabass.
Dicentrarchus labrax,European seabass,Plant proteins,performance,health status,immunity,histomorphology
https://ejabf.journals.ekb.eg/article_52408.html
https://ejabf.journals.ekb.eg/article_52408_d64a7f461e455c04e398e60abcd7596b.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Distribution patterns and ecological aspects of the sea urchin Diadema stosum in the Red Sea, Egypt.
93
106
EN
Mohamed
Hamza Hasan
10.21608/ejabf.2019.52592
<em>Diadema setosum</em> populations were surveyed at three sites representing different habitats of the Red Sea; El-Giesum at the northern Red Sea, Ras Mamlah at the Gulf of Aqaba and Beer Odeeb at the Gulf of Suez. A comparison among these sites was carried out for distribution patters, habitat preference and the character of habitat, which is preferred by<em>D. setosum</em>in addition to its role in the ecosystem at each site.
At Beer Odeeb, the population density from sand recorded 1-2.3 ind./m<sup>2</sup>, seagrasses 1.7-3.8 ind./m<sup>2</sup>, rocks 2.1-7.9 ind./m<sup>2</sup>, while it recorded its maximum densities at dead and live coral habitats. At Ras Mamlah the density recorded its minimum at sandy habitats (0-1.3 ind./m<sup>2</sup>) and its maximum at live coral habitats (2.3-28.9 ind./m<sup>2</sup>). The same pattern was recorded at El Geisum its minimum was at sandy habitat (0-0.3 ind./m<sup>2</sup>) and its maximum was from live coral habitat (1.3-32.4 ind./m<sup>2</sup>). Abundance of <em>D. setosum</em> was highest at El Giesum (163240 individuals) with 68.2% of the population recorded from the live coral habitat, followed by Ras Mamlah at the Gulf of Aqaba that recorded abundance of 87335 individual; live coral habitat accommodated 69.7% of the population. Finally, Ber Odeeb site at the Gulf of Suez recorded the lowest abundance (28176 individuals), with the highest percentage recorded from dead coral habitat being 34.8%, while live coral habitat at this site accommodated 24.3% of the population. The distribution pattern of <em>D. setosum</em> populations was determined using the coefficient of dispersion. The study revealed a difference in dispersion among the different habitats and sites. One way ANOVA revealed that the habitat preferences are varied according to the sites, areas on the reef and habitats. The three sites shared the preferable areas for the urchin, which are the fore reef and 5m depth, while the reef crest was not favorable for urchin existence.
In conclusion, the study revealed that live and dead corals environment were the most preferred habitat for <em>D. setosum</em>, in contrast, sand, seagrasses and rocky habitats were unfavorable. The species showed habitat preference according to the physical conditions and different habitats at each site. The presence of the urchin in this habitat is essential for protecting the coral fauna and for the health of the environment.
Sea Urchin,Diadema setosum,density,Abundance,habitat preference,Red Sea
https://ejabf.journals.ekb.eg/article_52592.html
https://ejabf.journals.ekb.eg/article_52592_1d51d81f46c92d7aab41bd667fa0b255.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Contribution of macroinvertebrates to leaf breakdown in the Okpara River, Bénin.
107
116
EN
Tchaou
C. Madina
Gouissi
F. Modeste
Abahi
K. Simon
Adje
D. Darius
Orou
P. Zoulkanerou
Okoya
J. Antoine
Gnohossou
M. Pierre
10.21608/ejabf.2019.51021
The decomposition of organic matter is a key process in the functioning of rivers. This organic matter is an important source of energy and nutrients in food webs. The objective of this work is to evaluate the degradation of the litter of three plant species in the water of the Okpara River. The degradation of the three leaves (<em>Piliostigma thonningii, Terminalia avicennioides and Flueggea virosa</em>) was made during the rainy season by using the litterbag technique of different mesh sizes which are large mesh (LM) of 5 mm and fine mesh (FM) of 0.5 mm. A total of 96 litterbags, each containing 3.5 g of dried litter were used; 32 litterbags (16 LM litterbags and 16 FM litterbags) per species. These litterbags were placed in the Okpara River waters during 28 days and 24 litterbags are recovered at four different dates: one week, two weeks, three weeks and four weeks. At each recovery date, four (04) physicochemical parameters (temperature, pH, conductivity and TDS) were measured and the macroinvertebrates were harvested. The study found that <em>Fluggea</em> leaves decompose and lose their weight faster than those of <em>Terminalia</em> and <em>Piliostigma</em>, a very rapid loss since it reaches the value of 58.29% of the initial weight in 28 days only. This loss of initial weight could be related to the structure of the leaf, the action of microorganism and the moderate rise in temperature (26 °C) favoring a biological activation. The study also revealed the dominance of the <em>Chironomidae</em> family and functional collector groups.
Okpara River,Decomposition,Leaf litter,Macroinvertebrates,Tropical stream,Bénin
https://ejabf.journals.ekb.eg/article_51021.html
https://ejabf.journals.ekb.eg/article_51021_bba675bc2343313079b9c5e7ac01128b.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Toxic and biological effects of Moringa oleifera Lam. crude seed extract against Culex pipiens L. (Diptera; Culicidae) larvae
117
125
EN
Amina
A. Rashad
Sohair
M. Gad Allaha
Imam
I. Ahmed
Magdi
G. Shehata
10.21608/ejabf.2019.52172
Mosquitos' resistance to chemical insecticides motivated the need for alternative control strategy. Therefore, botanical extracts have become one of the controls of revolutionary methods in the sustainable vector strategy. The current study was conducted under laboratory conditions to evaluate the toxicological efficacy of the crude seed extract of <em>Moringa oleifera</em> against the 3<sup>rd </sup>larval instar of <em>Culex pipiens</em> mosquito. A series of aqueous concentrations had been prepared (100, 80, 60, 40 and 20 ppm) to carry out the laboratory bio-assay experiment. The highest larval mortality took place at 100 ppm concentration (81.39%). LC<sub>50</sub> and LC<sub>90 </sub>values of <em>M</em>. <em>oleifera</em> seed extract recorded 67.91 ppm and 144.63 ppm after 120 hr exposure time, respectively. The obtained data revealed that larvicidal effect, malformed feature incidence and the cumulative larval death percentages were of a time and concentration-dependent manner. A similar trend had been documented for the total death percentages of both pupal and adult stages. On the contrary, the percentages of viable pupation and the emerged mosquito showed reverse responses. Accordingly, <em>Moringa</em> extract could be considered as a promising non-chemical candidate in the IPM programs of <em>Culex</em> mosquito.
Moringa oleifera,Culex pipiens,Culicidae,larvicidal effect,Bioassay,Seed extract
https://ejabf.journals.ekb.eg/article_52172.html
https://ejabf.journals.ekb.eg/article_52172_b2e21a7ce6b3f931ceed8b80f20fd02e.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Effect of thyroxine and carbimazole treatments on basal and histamine stimulated gastric acid secretion in the common African Toad (Bufo regularis).
139
147
EN
Ajayi
A. Folorunsho
Olaleye
S. Babafemi
10.21608/ejabf.2019.52174
Several studies have confirmed that thyroid hormones influence acid secretion particularly in mammals, but little attention is given to the influence of thyroid hormone on gastric acid secretion in amphibians. In this study, the basal and stimulated gastric acid secretions in carbimazole and thyroxine-treated common Africa toads were compared with controls. Thirty toads (100-120g b.w) were divided into three groups of ten toads each; Group “A” the control, Group “B” the hypothyroid group given carbimazole (5mg/250g b.w) and Group “C” the hyperthyroid group treated with thyroxine (5µg/100g b.w) treatments were carried out for 35 days by daily oral administration. Serum T<sub>3</sub>, T<sub>4</sub> and TSH levels confirmed the thyroid status of the toads. The mean Basal Gastric Acid (GAS) secretion in the control toads was significantly (p<0.05) higher than that of the carbimazole treated group, while the basal GAS of the thyroxine treated group was significantly (p<0.05) increased compared to the control. Administration of histamine intramuscularly increased significantly (p<0.05) the basal GAS of hyperthyroid toads, and the increment is higher than the GAS in control animals and in carbimazole treated toads. The parietal cells counts were significantly (p<0.05) higher in thyroxine treatment and lowered in carbimazole treated toads compared with control animals. In conclusion, increased thyroid hormone is associated with a rise in the basal secretion of gastric acid which is associated with increased histaminergic and zymogenic cell activities.
Gastric acid secretion,Histaminergic activity,Hyperthyroidism,hypothyroidism,Parietal cells
https://ejabf.journals.ekb.eg/article_52174.html
https://ejabf.journals.ekb.eg/article_52174_79cd47afc08d51107ab7729c416db147.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
08
Effect of different molecular weights of chitosan on the removal efficiencies of heavy metals from contaminated water
149
158
EN
Alaa
M. Younis
Mohamed
A. Aly-Eldeen
Eman
M. Elkady
10.21608/ejabf.2019.52591
In the present study, chitin isolated from locally available shrimp shells was pulverized to obtain three different particle sizes and then deacetylated to obtain various deacetylation degrees and molecular weights of chitosan. In the batch mode experiment, the removal efficiency of heavy metals [Zn(II), Cd(II), Pb(II), and Cu(II)] from synthetic wastewater solutions with different concentrations ranging from 10-30 mg/l using three molecular weights chitosan was evaluated. Cadmium was the best metal chelated by all three types of chitosan and the extent of adsorption was considerably higher in the type 1 of chitosan sample of small particle size with lower of molecular weight and higher of degree of deacetylation compared with types 2 and 3 chitosans. In addition, the maximum percent removal of heavy metal ions was at concentration 10 and 20 mg/l in order of Cd (II > Pb (II) > Cu (II) )> Zn (II), while at concentration 30 mg/l the removal efficiency of chitosan was in order of Cd (II) > Cu (II) > Pb (II) > Zn (II). The influence of pH is presented and the maximum uptake of metal ions was obtained at pH 4.0 at room temperature.
Heavy metals,Removal efficiency,Chitosan,bio-adsorption,Shrimp shells
https://ejabf.journals.ekb.eg/article_52591.html
https://ejabf.journals.ekb.eg/article_52591_3b669649e062149345297977b351bfa2.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Biodiversity of Fish Fauna in River Niger at Agenebode, Edo State, Nigeria
159
166
EN
Agbugui
M. Onwude
Abhulimen
E. Fran
Inobeme
Abel
Olori
Eric
10.21608/ejabf.2019.52847
The River Niger is blessed with diverse fish species and aquatic life. The study of the fish fauna and biodiversity along the River Niger was conducted from October 2016 to December 2018. A total of 35 species belonging to 18 families were obtained from this study. New to this River as regards literature are the family Solidae and Catostomidae. The sole fish (<em>Solea solea</em>) (0.16%) with only 1 representation while the Catastomids were represented by 3 species; <em>Ictiobus niger </em>(1.73%)<em>, Ictiobus cyprinellus </em>(2.20%)<em>, Ictiobus bubalus </em>(2.52%). Other species obtained were the <em>Mormyrus rume </em>3.93%,<em> Polyterus bichir </em>(2.99%) and <em>Protopterus annectens </em>(7.08%). The most abundant of species observed was <em>Gymnarchus niloticus</em> (8.49%) of the family Gymnarchidae while the least was <em>Solea solea</em> (0.16%). The biodiversity indices revealed that Station 2 had the most evenly distributed species and the most of diverse species though Station 1 had the most number of species. Station 3 however had the least of species obtained. It is concluded the River Niger is still productive and in good condition, capable of maintaining and managing fish species according to condition factor.
River Niger,Agenebode,Edo State,Nigeria,fish fauna,biodiversity,Management
https://ejabf.journals.ekb.eg/article_52847.html
https://ejabf.journals.ekb.eg/article_52847_52a64e719ccd35c576f69514e5802836.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Hydrography and plankton community structure of Marina El-Alamein, Egypt
167
179
EN
Howaida
Y. Zakaria
Ahmed
Radwan
0000-0001-9507-4632
aa_radwan@yahoo.com
Hala
Taha
dr.halamtaha@gmail.com
10.21608/ejabf.2019.52590
Marina El-Alamein is one of the biggest tourist summer resorts at the north coast of Egypt. This was the first tourist project in the northern Sahel region bordering the Mediterranean Sea in Egypt. The present study is the first attempt to provide data on hydrography and plankton community structure of the coastal and lake waters of Marina El-Alamein tourist resort. Samples were collected seasonally from 10 stations in the study area during 2017.
Forty five phytoplankton taxa included within five groups were identified during the present survey. Bacillarophyceae was the most diversified phytoplankton group (28 taxa) followed by Dinophyceae (7 taxa), Chlorophyceae (5 taxa), Cyanophyceae (3 taxa), and Euglinophyceae (2 taxa). The highest phytoplankton abundance was 4.44×10<sup>3</sup> unit/l in summer and the lowest value was 3.55×10<sup>3</sup> unit/l in winter with an annual average of 4.03×10<sup>3</sup> unit/l. Zooplankton community in the study area comprised 14 species; 4 Protozoa, 4 Copepoda, 3 Rotifera, besides one species of cnidarian, one ostracod and one of molluscs. The meroplanktonic larvae of polychaetes, decapods and molluscs were also recorded. The lowest zooplankton abundance was recorded during winter (aver. 0.9×10<sup>3</sup>ind.m<sup>-3</sup>) while the highest abundance was recorded during autumn (aver. 27.6×10<sup>3</sup>ind.m<sup>-3</sup>). Copepoda was the highest abundant group (81.77% of the total zooplankton crop) followed by Rotifera, the meroplanktonic larvae of Mollusca and Polychaeta.
Finally, it would be concluded that the plankton community structure in Marina El-Alamein area represents a balanced and stable marine ecosystem. This is probably due to the exchange of waters between the Sea and lagoon and good environmental management of the lagoon by the concerning authorities.
Hydrography,phytoplankton,Zooplankton,Marina El-Alamein,Egypt
https://ejabf.journals.ekb.eg/article_52590.html
https://ejabf.journals.ekb.eg/article_52590_85fbb1357e44c2d5c0c7217a1202ab8f.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
The mouth and gastrointestinal tract of the african lung fish Protopterus annectens (owen 1839) in River Niger at Agenebode, Edo State Nigeria
181
188
EN
Agbugui
Marian Onwude
Oniye
Sunnie Joshua
10.21608/ejabf.2019.52848
The mouth of <em>P. annectens</em> is terminal, its jaws are modified to hold incisors -scissor-like teeth that can hold and tear deep into the flesh of prey. The mouth opens up to 10% of its total body length which allows the fish to seize its prey easily. The gastrointestinal (GIT) is straight, short and a composite comprising of many organs and tissues. The organs are wrapped in serosa. The morphology and histology of the GIT, (oesophagus to the cloaca) reveals the adaptation to the food and feeding habit of fish. The numerous mucosal folds in the intestine are a usual occurrence in carnivorous species. The ability of the intestine to distend and the presence of the numerous large folds allow fishes to accommodate a large quantity of food items as digestion takes place and nutrients are being ingested.
Protopterus annectens,African lung fish,River Niger,Agenebode,Gastrointestinal tract
https://ejabf.journals.ekb.eg/article_52848.html
https://ejabf.journals.ekb.eg/article_52848_d081518c33030995378e8dbfa58c892b.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
10
Ultra structural study of the Embryonic Development in the Intrauterine Eggs of Acanthostomum (atrophocaecum) aswaninesis Wannas, 1977 (Digenea, Acanthostomatidae) with evidence of early miracidium development
189
200
EN
Hewaydah
E. Abou Shafeey
Azza
A. Taeleb
10.21608/ejabf.2019.52839
<span>Intrauterine embryonic development of the eggs of </span><em>Acanthostomum (atrophocaecum) aswaninesis</em> was investigated by transmission electron microscopy. The study revealed the successive stages of embryonic development of the eggs. The proximal uterus contains unembryonated eggs and eggs with early embryos while the distal regions of the uterus were occupied with eggs containing fully developed embryos, each was composed of a fertilized oocyte and few vitelline cells; which were fused forming the vitelline syncytium that characterized the early embryonated eggs. With egg development, the eggshell progressively thickened with the appearance of the operculum after shell formation at the narrower pole of the eggshell surface. Three types of differentiated blastomeres are formed as a result of the continued cleavage divisions; macromeres, mesomeres and micromeres, with nuclei of different shapes and sizes. They occupy different places within the embryo. As a result of the following cleavage divisions, early degeneration or apoptosis of some micromeres take place. Numerous fully developed cilia are easily visible around the differentiated embryo (miracidium) of the advanced stages. The cilia have a typical 9+2 (nine peripheral and two central) arrangement of microtubules. The germinative cells of miracidia have easily appeared in the medioposterior parts of their ciliated larvae. The results of the present study were compared with those previously reported for other parasitic Platyhelminthes.
Intrauterine eggs,Acanthostomum,Miracidium,Digenea,Ultrastructure
https://ejabf.journals.ekb.eg/article_52839.html
https://ejabf.journals.ekb.eg/article_52839_4207f18202c7adba4753cd7acf949598.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Inactivation of Toxocara vitulorum eggs by Ammonia in combination with solar energy
201
214
EN
Mohammed
M. Aboamer
Azza
H. Mohamed
Gamalat
Y. Osman
Eman
H. Abdel Rahman
Eman
E. El Shanawany
10.21608/ejabf.2019.52938
Eggs of intestinal parasitic helminthes <em>Toxocara </em>spp<em>.</em> are one of the most resistant pathogens to all ways of water disinfection at waste water treatment plants. In this study inactivation of(<em>Toxocara vitulorum</em>) eggs by ammonia and solar energy in laboratory conditions has been indicated. <em>Toxocara vitulorum</em> eggs were used as an alternative model for <em>Ascaris lumbricoides</em>. Eggs in samples with ammonia different concentrations (0%, 1%, and 2% ) and pH values were duplicated and the results suggested that the presence of ammonia at (2%) concentration allowed 70% inactivation of eggs. The applicability of solar energy for disinfection ofeggs using one-side blackened PET bottles were continuously exposed to direct sun light for 7 hours with water temperature in the range of 50 – 65.5 °C that was enough for destroying 95 % of eggs. Complete destruction of the eggs was achieved at 65.5°C.The influence of solar energy against the viability ofeggs in water using Diamidino-2-Phenylindole (DAPI) and Propidium Iodide (PI) vital stains was found to be highly significant (<em>P</em> < 0.001). The combined effect of ammonia and solar energy on samples containing eggs with temperature 55°C within 21 days of storage within experiment operated in lab . The effect of ammonia and solar energy on viability of eggs using scanning electron microscope , (DAPI); and Propidium Iodide ( PI) vital stain were evaluated. The results showed that 100 % inactivation of eggs could be possible in samples, supporting results have an important implication for ecological sanitation and sustainable development technologies in water and waste water treatment plants. The low cost and operational simplicity of this study make it affordable and usable especially in rural areas where other sources of energy like electricity and gas are not easily available.
Toxocara vitulorum,Ascaris,solar energy,Ammonia inactivation,Wastewater,viability assessment,Egg vitality
https://ejabf.journals.ekb.eg/article_52938.html
https://ejabf.journals.ekb.eg/article_52938_217fe0b59e6a89c1b4ce13c92b1d509b.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Long-term variations of zooplankton community in Lake Edku, Egypt
215
226
EN
Howaida
Y. Zakaria
Hussein
A. El-Naggar
10.21608/ejabf.2019.53997
Lake Edku receives huge amounts of waste waters discharged from various effluents that could be affecting on its ecological and biological features. Samples were collected seasonally for seven subsequent years (2009 - 2015) from 9 stations represent the different habitats in Lake Edku to assess the ecological status of the lake through long-term variations of zooplankton community. The data of physico-chemical parameters indicated that some parameters had wide variations in yearly average and others changed within narrow range. Lake Edku is considered among the highly eutrophic lakes as the average values of Chlorophyll- a concentrations all over the study period always higher than the eutrophication level. Zooplankton community in the lake comprised 77 species. Rotifera and Copepoda were the most abundant and diversified groups. Long-term variations of zooplankton abundance and diversity indicated that the lake is in continuous degradation. This also confirmed by the dominance of rotifer species belonging to genera <em>Brachionus</em>, <em>Polyarthra</em>, <em>Keratella</em> and <em>Filinia</em> which were considered as bio-indicators of organic pollution. However, it would be concluded that Lake Edku is highly eutrophic basin, under severe conditions and their ecological status is too bad and needs repair.
Zooplankton,Long-term variations,diversity,Lake Edku,Egypt
https://ejabf.journals.ekb.eg/article_53997.html
https://ejabf.journals.ekb.eg/article_53997_e104c85150e2030dcba479cd2cae8e88.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
16
Effect of α-Chlorohydrin water-bait on the fertility of captive males of the Egyptian fruit-bat (Rousettus aegyptiacus) and the proper time for controlling its free-ranging populations in Egypt
227
237
EN
Ayat
Taha
000022210200033
logynour777@gmail.com
Sohail
Soliman
000022210200033
sohailsoliman@yahoo.com
10.21608/ejabf.2019.53599
The Egyptian fruit-bat (<em>Rousettus aegyptiacus</em>) is a serious vertebrate pest that lives in riverine and agricultural habitats of the Nile Delta and Valley of Egypt. The present work evaluates the acceptability and effect of a water bait of α-chlorohydrin (ACH), which is a well-known species-specific male chemosterilant, on the fertility of males of this bat species. A dose of 85.7mg/kg consumed by captive males for four consecutive days has damaged their testicular tissues, caused a significant decrease in sperm count and motility and a significant increase in sperm abnormalities. Preliminary results of the study of the reproductive cycle of this bat species in one of the districts of Greater Cairo Area showed that males had reached peak sexual activity during autumn mouths. For best control results, it is suggested that control campaigns be implemented during these months. It is recommended that ACH water-baits be set in roosting caves and near fresh water courses where bats used to drink.
Riverine habitats,Water-bait,Egyptian fruit-bat,Rousettus aegyptiacus,α-chlorohydrin,antifertility,control
https://ejabf.journals.ekb.eg/article_53599.html
https://ejabf.journals.ekb.eg/article_53599_75ddd31fe0c32d7e156e65b7240df9a6.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Molecular and morphological confirmation of an invasive American isopod; Livoneca redmanii Leach, 1818, from the Mediterranean region to Lake Qaroun, Egypt
251
273
EN
Khaled
Mohammed-Geba
https://orcid.org/00
khaledmohammed@science.menofia.edu.eg
Sherin
K. Sheir
Robert
Aguilar
0000-0001-8732-5382
aguilarr@si.edu
Matthew
B. Ogburn
Anson
H. Hines
Hussain
J. Khalafallah
Ahmed
El-Kattan
falcon_kattan@yahoo.com
Sobhy
E. Hassab El-Nabi
Asmaa
Galal-Khallaf
as_kh_22@yahoo.com
10.21608/ejabf.2019.54062
In 2015, unknown cymothoid isopod parasites were found in Lake Qaroun, a high-salinity closed inland lake in north-central Egypt, which were linked to substantial fish mortalities. The parasites infected a wide range of commercially important fish hosts, including Redbelly tilapia, <em>Tilapia zillii</em>, European Seabass , <em>Dicentrarchus labrax,</em> Common Sole, <em>Solea solea</em>, and mullets <em>Mugil </em>spp. and <em>Liza </em>spp., and continue to present a threat to local fisheries. A number of recent publications (in aggregate) have suggested this introduction reflected a near simultaneous introduction of up to four cymothoid species in Lake Qaroun; however, many of the provided photographs and illustrations were incorrect at the generic and species level. Cymothoid isopod samples were collected from Shakshouk village on Lake Qaroun. An integrative taxonomic approach was applied in the current study, incorporating traditional taxonomic analysis and DNA barcoding through mitochondrial <em>COI </em>gene sequencing, as well as genetic phylogenies to delimit isopods collected in Lake Qaroun. All isopods examined were identified as <em>Livoneca redmanii</em> Leach, 1818, an estuarine-marine species native to the western Atlantic. These samples were genetically and phylogenetically identical to their counterparts collected from Chesapeake Bay in the East of the USA. This species was characterized by pigmentation on cephalon, pereonites, pleonites, telson, pereopods and slightly bent to the left. A review of the recent literature of cymothoids in Lake Qaroun and adjacent marine areas concluded that the majority of individuals identified as species other than <em>L. redmanii</em> were actually <em>L. redmanii,</em> or unidentifiable juvenile cymothoids, with the exception of a juvenile <em>Anilocra</em> sp.. Likewise, <em>L. redmanii</em> is also present in eastern Mediterranean and Suez Canal. The likely introduced vector into Lake Qaroun are fish stockings originating from the Mediterranean Sea and River Nile estuary (as is surmised with the introduced American ctenophore species, Mnemiopsis leidyi). This information can help fishery managers better understand parasite-host dynamics in Lake Qaroun and develop biocontrol strategies to mitigate its impact in Lake Qaroun and limit its spread among adjacent lacustrine, estuarine and coastal systems.
Lake Qaroun,Isopod parasite,Morphology,DNA barcoding,Invasive sp,Cymothoidae
https://ejabf.journals.ekb.eg/article_54062.html
https://ejabf.journals.ekb.eg/article_54062_2d04ff7853ceefc5fbb3f3c23fb58f3c.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
20
Adsorption of heavy metals from polluted water using low cost materials
275
284
EN
Hala
E. Ghannam
Sayed
A.A. Shama
Abdelrahman
S. Talab
Abdelazim
M. El-Sharkawy
Karima
O. Abbas
10.21608/ejabf.2019.54225
In this study, chitosan and activated carbon (AC) were used as low cost materials for heavy metals removal and they were characterized by SEM, FTIR and X-ray. In the case of batch experiment chitosan and AC give a good removal of Fe, Cu and Zn from aqueous solutions under the effects of sorbent dose, pH, contact time, temperature and initial metal concentration. For application of the removal effect of chitosan and AC on water samples collected from River Nile at Helwan, Hawamdia and El-Kanater El-Khiria cities in greater Cairo, the two sorbents showed excellent removal of the industrial wastewater. Our results show the order of removal of the investigated heavy metals for chitosan were Fe> Pb> Cu> Zn> Mn while for AC were Mn> Cu> Fe> Pb> Zn. So chitosan and AC can be used as a good absorbent materials cheap, effective and nontoxic for heavy metal removal.
Activated carbon,Chitosan,Heavy metals,Polluted water,SEM,X-ray
https://ejabf.journals.ekb.eg/article_54225.html
https://ejabf.journals.ekb.eg/article_54225_84eb4cfe454d71cd30e21aa27bdcb758.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Feeding patterns of the Mormyrid fish Brienomyrus brachyistius (Gill, 1862) in Kogon and Tinguilinta rivers (Guinea Republic).
239
248
EN
Boussou
K. C.
Yoboué
A. N.
Djiriéoulou
K. C.
Aliko
N. G.
Konan
K. F.
10.21608/ejabf.2019.54832
Dietary patterns of <em>Brienomyrus brachyistius</em> (Gill, 1862) in Tinguilinta and Kogon rivers were described. Diets composition and feeding strategy were analyzed among hydrosystems based on the stomach content analysis. The diets compositions were similar in the two rivers and essentially composed of insects larvae (Diptera, Coleoptera, Ephemeroptera and Trichoptera) and insects debris. <em>Brienomyrus brachyistius</em> exhibited a generalist feeding strategy with a relatively narrow niche width in the two rivers as there was a trophic specialization by many individuals toward Trichoptera larvae. Apart from insects, seeds and sand were found in many stomach contents. The ontogenetic analysis of diet indicated that there were not size-related changes in the diet of the studied species.
Kogon River,Tinguilinta River,Brienomyrus brachyistius,Mormyrid fish,Feeding habits,Guinea Republic
https://ejabf.journals.ekb.eg/article_54832.html
https://ejabf.journals.ekb.eg/article_54832_73f78595bb15e4efde0149c9df6cab47.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
18
The role of lectin in improving growth performance, feed utilization, immunity, and disease resistance of the Nile tilapia, Oreochromis niloticus fingerlings
285
300
EN
Said
M. Ezzat
Refaat
M.A. El-Gamal
Asmaa
S. Abd El-Naby
Samah
A.A. Abd El-Hamid
Alaa
R. A. Mousa
10.21608/ejabf.2019.57931
There is an interesting in using of medical and aromatic plants or spices as feed additives in fish diets instead of chemical products to avoid side effects and achieve organic aquaculture. Feeding experiment was conducted to evaluate the growth of the Nile tilapia fingerlings fed four isonitrogenous (30% crude protein) experimental diets containing different levels 0.0% (control), 1.0%, 1.5%, or 2% of <em>Moringa lectin</em> (MLM). The diet containing 1.5% MLM resulted in significantly greater (P < 0.05) specific growth rate (SGR), feed conversion ratio (FCR). Moreover, PER and APU values increased significantly at MLM-supplemented diets. While, there was no significant difference among all treatments of MLM in EU%. In regard to body composition, there was no significant difference in dry matter, lipids, and ash (P > 0.05) contents due to lectin supplementation. While, crude protein content increased significantly by increasing the MLM levels (P<0.05). Blood plasma profile showed an improvement in hemoglobin (HB), red blood cell (RBCS), hematocrite (Hct), WBCs, Lymphocytic, Monocytic, Granulocyte, glucose and gloubin, while, there was a decrease in total protein, total lipids, decrease in creatinine, urea, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and cholesterol in fish fed 1.5% MLM. Moringa lectin supplementation enhance non-specific immune response of <em>O. niloticus</em>aslysozyme activity and respiratory burst activity showed significant increase in group fed 1.5 MLM then group fed 2 % followed by 1 % than control group. Moringa lectin was found to have an antibacterial activity antagonistic to <em>Aeromonas hydrophila</em> infection in fish. Improvement in Superoxide dismutase activity (SOD), Catalase activity (CAT), Glutathione S-transferase (GST) and Malondialdehyde (MDA) activities were observed at 1.5% MLM activities which was consistent with the immune response. Performance and FCR improvement translated into a 22.74% decrease in feed costs associated with the 2% MLM diet.
Moringa lectin,Lectins,Growth performance,feed utilization,body composition,Immune Response,antioxidants,Nile tilapia
https://ejabf.journals.ekb.eg/article_57931.html
https://ejabf.journals.ekb.eg/article_57931_56dd34bbdfed8ff6e180b0306a514e6f.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Optimization and Kinetic studies of biodiesel production from the green alga Ulva fasciata Delile
301
322
EN
Nayrah
A. Shaltout
Mustafa
A. Ghazal
Nihal
G. Shams El-Din
Alaa
E. Ali
Doha
M. Beltagy
10.21608/ejabf.2019.54922
In this investigation, optimization experiments were carried on lipid extraction and biodiesel production parameters from <em>Ulva fasciata</em> as a potential feed stock. This study was carried by running one to one optimization model. The results showed that, the highest yield and the best quality of biodiesel was achieved at the optimum condition of <0.16 mm algal particle size, 55<sup>o</sup>C extraction temperature, 25:1 v/w solvent to solid ratio, 60 min extraction time and 250 rpm shaking speed, using chloroform: methanol: H<sub>2</sub>O (2: 2: 1) solvent mixture. The recorded lipid yield was 28.84 mg g<sup>-1</sup> with total fatty acids ΣTFAs content 1148.94 µg g<sup>-1</sup>, saturated fatty acids ΣSFAs=979.43 µg g<sup>-1</sup>, monounsaturated ΣMUFAs=136.98 µg g<sup>-1</sup> and polyunsaturated ΣPUFAs fatty acids =32.53 µg g<sup>-1</sup>. The quality of the produced biodiesel at these optimum conditions was determined by its physicochemical properties which showed a very high quality. Cetane number (CN) was 73.21, while kinematic viscosity (υ), density (<em>ρ</em>), higher heating value (HHV) and iodine value (IV) were 4.68 mm<sup>2</sup>s<sup>-1</sup>, 0.87 g cm<sup>-3</sup>, 39.85 MJ kg<sup>-1</sup> and 18.48 gI<sub>2</sub>100g<sup>-1</sup>fat, respectively. Other properties such as degree of unsaturation (DU), saponification value (SV) and long chain saturation factor (LCSF) recorded 17.58, 200.66mg KOHg<sup>-1</sup> and 23.06, respectively. On the other hand, Linolenic acid (C18:3) % and Polyunsaturated fatty acid methyl esters containing ≥ 4 double bonds % recorded 0.68% and 0.98%, respectively. The initial extraction rate (h) was 6.169 ml g<sup>-1</sup> min<sup>-1</sup>; the extraction capacity (Cs) was 31.036 g ml<sup>-1</sup>; the second order extraction constant (k) was 0.0064 ml g<sup>-1</sup> min<sup>-1</sup> and the coefficient of determination (R<sup>2</sup>) was 0.9994.
Ulva fasciata,Green alga,Biodiesel,Optimization,fatty acids,Kinetic study
https://ejabf.journals.ekb.eg/article_54922.html
https://ejabf.journals.ekb.eg/article_54922_2b21c8b8402b89ca58a7e763c6a8f21e.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
29
Genetic divergence in Trachurus indicus (Nekrasov, 1966) and Decapterus maruadsi (Temminck & Schlegel, 1843) , Family: Carangidae dwelling the Gulf of Suez, Red Sea
323
334
EN
Mohamed
E. Megahed
Manal
M. Sabrah
Tasneem
E. Abo-El-Maaty
Asaar
S. H. El-Sherbeny
Alaa
M. Younis
10.21608/ejabf.2019.55845
Family Carangidae is widely distributed in the Atlantic, Indian and pacific Oceans. Two morphologically similar species, <em>Trachurus indicus</em> and <em>Decapterus maruadsi</em>, were collected and recognized from the Gulf of Suez. The two species have no distinct differences morphologically. Microsatellite DNA markers revealed that the populations of the two species represented distinct genetic divergence. This genetic diversity study showed that the populations of the two species are not related to each other. Overall, this study reveals high genetic diversity of <em>T. indicus</em> and <em>D. maruadsi</em> populations<em>. </em>Further studies on the genetic structure of these two species, are needed not only to understand the evolutionary history of the species, but also to improve the knowledge-based fishery management programs of this important biological resources.
Carangidae,Trachurus indicus,Decapterus maruadsi,Gulf of Suez,Microsatellite,genetic divergence
https://ejabf.journals.ekb.eg/article_55845.html
https://ejabf.journals.ekb.eg/article_55845_206324e8a5ef7153df0171b889fcc1ed.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Comparative assessment of the seasonal breeding patterns of the paddlefish Polyodon spathula (Walbaum, 1792) and the impact of growth tendency during winter and summer feeding
335
346
EN
Lydia
M. Vasilyeva
Mahmoud
Elnakeeb
0000-0003-4881-9472
mahmoud.biotech@azhar.edu.eg
10.21608/ejabf.2019.56783
Seasonal rhythms affect paddlefish farming practices due to the interactions among internal and external environmental factors in the aquatic ecosystem, including different types of biological, chemical, or physical stressors. In the present study, seasonal variations and the succession of the seasons during the farming periods represent a striking force that reflects the reality of sustainable paddlefish development under Russian aquaculture conditions. Five age groups (28, 29, 30; 26, 27, 28; 24, 25, 26; 19, 20, 21; and 18, 19, 20) were studied based on years of commissioning (1993, 1995, 1997, 2002 and 2003, respectively) and showed different growth rates throughout the seasons during 2017, 2018, and 2019. Consequently, rapid growth rate changes; increasing and decreasing, were observed, as demonstrated in weight gain and specific growth rate parameters. All the growth parameter variables, knowledge base and inference in the growth monitoring analysis model were carried out through computation of weight gain, growth rate, and specific growth rate related to age groups. The results revealed that the descriptive analysis of seasonal variability agreed with the statistical growth performance analysis. Moreover, the findings show that 2017 and 2018 winter and 2017 summer seasons recorded the lowest values of significance (30: 55%, SGR) among the five age groups. In contrast, high values were obtained for 2018 and 2019 winter and 2018 summer seasons (55: 80%, SGR), despite sustainable production. However, it is insufficient to determine the value of the seasonal response in growth rates over four seasons. Therefore, we need to create simulation programmes to predict the impact of seasonal patterns instead of spending more effort and cost on other methods.
Paddlefish,Polyodon spathula,Farming season,Growth monitoring,growth parameters,Seasonal rhythms,Sustainable production
https://ejabf.journals.ekb.eg/article_56783.html
https://ejabf.journals.ekb.eg/article_56783_e3fe62bcb6b9d62ebca14ca3b3bd4ae8.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Ecological studies on families Veneridae and Mactridae (Mollusca: Bivalvia) inhabiting the western coasts of the Suez Gulf, Egypt
347
364
EN
Hosam
A. M. El Mekawy
Awaad
A. M. El-Sayed
Mohamed
A. Amer
Mostafa
H. Sarhan
10.21608/ejabf.2019.54925
The faunal composition, abundance, distribution, population density and diversity of bivalve species of families Mactridae and Veneridae were investigated from 11 sites along the western coasts of the Gulf of Suez during the period from summer 2017 to summer 2019. A total of 13 bivalve species belonging to 5 subfamilies within 9 genera of the two families were recorded. Family Veneridae was the dominant and represented by 11species (84.62%) compared with only 2 species of family Mactridae represented 15.38% of all recorded species. <em>Mactra olorina </em>(family Mactridae), <em>Gafrarium pectinatum, Callista florida </em>and <em>Circe rugifera </em>(family Veneridae) were the most frequent species at sites II (Kabanon), III (Adabia) and IV (Ain Sokhna) during this study. Site III accommodated all recorded bivalves (13 species), followed by 8 species at site II, decreased to 6, 4, 4 and 3 species at sites IV, V (Monte Galala), XI (Al Azazia – north Ras Gharib) and I (Suez Bay), respectively. A total of 1208 individuals were collected from the study sites, 842 individuals (69.70%) are venerids and 366 individuals (30.30%) are mactrids. The majority of individuals (1179) were collected from sites III, II and IV, which accommodated 599, 546 and 34 individuals, respectively. The values of Simpson's diversity index, Shannon-Weaver index, evenness, and Margalef´s Species richness were calculated at each site. The annual values of these indices averaged 0.42, 1.70, 0.21 and 1.11(site II), 0.30, 2.13, 0.16 and 1.88 (site III) and 0.20, 2.35, 0.39 and 1.42 (site IV), for these indices, respectively. The highest values for Simpson's index of similarity recorded 76.19 % and 71.43 % between site II and both of sites III, and IV, respectively.
Red Sea,Gulf of Suez,Mollusca,Veneridae,Mactridae,diversity,density
https://ejabf.journals.ekb.eg/article_54925.html
https://ejabf.journals.ekb.eg/article_54925_80bff7b6f2598168ebc80ae7e7e265e8.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
30
Application of RAPD-PCR and Morphometric studies on two native Octopodid species from the Mediterranean Sea.
365
371
EN
Tarek
G. Ali
tabdelaal@kku.edu.sa
10.21608/ejabf.2019.110380
Two species of octopuses were collected from Abu Quir, Alexandria, Egypt, <em>Octpus vulgans</em> and <em>Octopus macropus</em>. The mantle muscles were fixed in absolute ethyl alcohol. DNA was extracted and RAPD-PCR was conducted using 4 primers. The distance morphometric analysis of two species was applied on Arm length, Mantle length, Mantle width and body weight. The estimation of genetic distance was 0.55. In addition, morphometric studies showed no significant difference in mantle length and mantle width in both males and females. On the other hand, Arm length and body weight of 50% of males and females showed significant differences. In conclusion, the result of RAPD- PCR together with the morphometric may suggest that the two species may be two subspecies.
RAPD,PCR Morphometry Octopus Abu Quir Alexandria Mediterranean Sea
https://ejabf.journals.ekb.eg/article_110380.html
https://ejabf.journals.ekb.eg/article_110380_6405baf6483469192764abdbec0aacb1.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
30
The Role of Nigella sativa in improving the immune response of the African Catfish (Clarias gariepinus) to Aeromonas hydrophila Vaccine
373
384
EN
Salah
M. Aly
Mona
M. Ismail
Mohamed
Fathi
aquavet@yahoo.com
Mohamed
A. Al Zohairy
10.21608/ejabf.2019.56086
In the past few decades, the search for alternative strategies for disease management other than chemotherapeutants has been encouraged. Recently, disease prevention among fishes depends mainly on the use of vaccine and immunostimulants together with optimal husbandry conditions. The present study examined the effects of Nigella sativa (NS) on the response of catfish (<em>Clarias gariepinus)</em> to vaccination and/or challenge infection. For this purpose, four hundred catfish allocated into four groups with two feeding regimes (basal diet (G1 & G2) and diet supplemented with <em>NS</em> at a dose level of 3 g/100 g diet (G3 & G4). The groups (G2 & G4) are intraperitoneally (IP) vaccinated with 0.1 ml formalin-killed <em>Aeromonas hydrophila </em>bacterin. The effects of NS in G3 and G4 are evaluated in comparison with other groups (G1 & G2) using hematological and biochemical parameters together with histopathological examinations. Six weeks after the start of the experiment, the results revealed a significant increase in erythrogram (RBCs, Hb and PCV%), Leucogram (total Differential leucocytic count), serum total protein and globulin in catfish supplemented with 3% <em>NS. </em>On the other hand, no significant changes in liver enzymes, urea, uric acid and creatinine among all experimental groups were noticed. The histopathology revealed proliferation of hematopoietic tissues and the activation of melanomacrophages in both supplemented and vaccinated groups. Two weeks after the challenge experiment, vaccinated groups (G2 and G4) showed a significant increase in the antibody titer while treated groups supplemented with 3% NS showed a significant increase in the phagocytic activity. After the challenge, catfish vaccinated and supplemented with 3% NS showed the highest (95%)relative level of protection (RLP) followed by a vaccinated group (85%) then supplemented group(55%). <em>Nigella sativa</em> (3 g/100 g diet) enhances the immune response and resistance of catfish to <em>A. hydrophila </em>and consequently has a potential value for aquaculture.
catfish,Clarias gariepinus,Immune Response,Aeromonas hydrophila,Nigella Sativa,Phagocytic activity,histopathology,hematology
https://ejabf.journals.ekb.eg/article_56086.html
https://ejabf.journals.ekb.eg/article_56086_047c3173c3fdfba6df9d43c47e689586.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
31
Ultrastructure of Lamproglena pulchella (Copepoda: Lernaeidae), a gill parasite on the freshwater fish, Leuciscus vorax, from Tigris River, Iraq
385
389
EN
Shereen
A. Fahmy
Salwa
Z. Arafa
Zeyad
K. Hamdan
10.21608/ejabf.2019.56369
A new record of Lamproglenine copepods, <em>Lamproglena pulchella</em> were collected from the gills of cyprinid freshwater fish <em>Leuciscus vorax </em>from the Tigris River, Iraq in order to investigate the morphological and functional characteristics of their appendages using scanning electron microscope. A maxilliped appears robust, and bears at its apex two subequal curving, claw-like spines. First legs were with a small protuberance on medial margin of the sympod near the base; endopod apparently unsegmented, exopod indistinctly two-segmented, with several setae on lateral margin and single stout seta on apex. Second legs have two segmented rami; endopod unarmed and exopod with single seta on lateral margin of basal segment and three setae at apex. Third and fourth pairs of appendages were similar, with alike rami and with only two setae at the apex of exopod. These appendages are thought to serve as a holdfast for attachment on the gill filament of the tigris fish. Cuticular differentiations found on the body surface of <em>L. pulchella</em> play a secondary role in the attachment of the copepod on its host. Current study microscopy shows that the maxillae of <em>L. pulchella</em> are characteristically prehensile and thus provides an efficient tool for the attachment to the host tissue.
Tigris River,parasitic copepods,Lamproglena pulchella,Leuciscus vorax,Gill parasite,Ultrastructure
https://ejabf.journals.ekb.eg/article_56369.html
https://ejabf.journals.ekb.eg/article_56369_202dbd357c9df7fa2c323a36b1ecd868.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Effect of Crocus sativus aqueous extract (saffron) on Schistosoma mansoni worms in experimentally infected mice
391
408
EN
Amal
M. Shaaban
Hany
M. Ibrahim
Azza
H. Mohamed
10.21608/ejabf.2019.56733
The present study is designed to evaluate the therapeutic effect of <em>Crocus sativus</em>(saffron) aqueous extract (CSE) alone or in combination with praziquantel on <em>Schistosoma mansoni</em> infected mice. Parasitological, immunological, pathological and immunohistochemical parameters and surface topography of worms were determined. Treatment of <em>S. mansoni</em> infected mice with saffron or PZQ revealed a significant reduction in worm burden, hepatic and intestinal ova count with a decline in granuloma diameter. There was an increase in total IgG and IL-10 blood levels after treatment with PZQ and/or CSE. Superoxide dismutase (SOD) and catalase levels were improved in infected mice treated with CSE in comparison with infected mice. Male worm surface ultrastructure examination showed a swelling, rupture of numerous tubercles with marked decrease in spines and severe peeling of tegumental dorsal surfaces after treatment with saffron. In conclusion, the administration of aqueous extract of <em>Crocus sativus </em>is effective treatment for <em>S. mansoni </em>infection.
Crocus sativus,Schistosoma mansoni,Saffron,Granuloma,antioxidants,Worm SEM
https://ejabf.journals.ekb.eg/article_56733.html
https://ejabf.journals.ekb.eg/article_56733_73f9b717be7f717e45b58fce4b514de1.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
30
New recorded alein polydorid species (Polychaeta: Spionidae) from the Egyptian waters
409
420
EN
Faiza
Ali Abd Elnaby
10.21608/ejabf.2019.56151
Benthic samples were collected from Suez Gulf within the Project of Betro Gulf petrolum campany 2015; Anather coastal samples were collected from Aqaba and Suez Gulf as well as the Red Sea to study water quality, benthos and bacterial indicators for pollution 2010, Also samples were collected from rocky shore from El Max and Abu Qir stations (Alexandria) 2016. In the present study, 10 spionid species, genus: <em>Polydora</em>, <em>Dipolydora</em>, <em>Boccardia</em> and <em>Pseudopolydora</em> were reported. Six of them are new records to Egyptian waters. <em>Polydora cornuta</em> Bosc, 1802, <em>Dipolydora socialis</em> (Schmarda, 1861), <em> Pseudopolydora paucibranchiata</em> (Imajima & Hartman, 1964) and <em>D. armata</em> (Langerhans, 1880) are considered alein species , <em>Polydora websteri </em>(Hartman in Loosanoff & Engle, 1943) is considered as lessepsian migrant species, it is indo-pacific origin reported before in Red Sea and migrated through Suez Canal, and <em>Dipolydora protuberata</em> (Blake & Kudenov, 1978 The importance of major setae of setiger 5 with its relation with boring and non boring activity for polydorid species are reported.
Polychaeta,Spionidae,Alein species,El Max,Abu Qir,Gulf of Suez
https://ejabf.journals.ekb.eg/article_56151.html
https://ejabf.journals.ekb.eg/article_56151_eba7c4ce68311052e1c4e3200ece0646.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
10
01
Utilization of Nannochloropsis oceanica alga for biodiesel production and the de-lipidated biomass for improving Red tilapia aquaculture
421
436
EN
Ali
M. Abugrara
Heba
S. El-Sayed
Mohamed
A. A. Zaki
Abd El-Aziz
M. Nour
10.21608/ejabf.2019.58081
This work was carried out, firstly for investigating the different effects of various organic carbon sources [fructose (A), lactose (B), glucose (C)], and nitrogen sources [poultry manure extract (PM) and rumen liquor (RL)] which used at ratio 50:50% F/2 medium on maximizing production of biodiesel from the marine microalga <em>Nannochloropsis oceanica</em>. Secondly, we apply the residual lipid-free biomass as feed additives in Red tilapia aquaculture. In phase1, the biomass (DW), biodiesel contents and biochemical compositions of <em>N. oceanica</em> were determined. The results showed varied biomass and biochemical analysis in DW bases between treatments. However, A was achieved significantly the maximum DW for the algal biomass and protein percentage, whereas lipid accumulation was the most in RL as well as achieving the highest biodiesel content. In phase 2, algal biomass by-product (lipid-free) from the superior treatments A and RL were applied at 4 rates (1,2,3 and 4) for concentrations 25,50,75&100%, respectively that substituting soybean for feeding red tilapia larvae as compared with control CO. The initial weight and length of the larvae were 0.32g and 1.9 cm, respectively continued for a duration of 30 days of the experiment. After the end of the experimental period , growth performance, survival percentage (SR%) and biochemical analysis were estimated. The results revealed that SR% was higher significantly for RL2 than A1 (93% & 90%) as compared to control (86.7%). Accordingly, red tilapia carcass attained maximum protein contents for diets A1 & RL2 in whereas lipid content was maximum in control. Finally, authors suggesting the use of Roman liquor as a novel treatment for cost-effective promoting biodiesel content and the remained biomass with 50% substitution of soybean in the diet (RL2)achieved also good results for improving red tilapia aquaculture.
Nannochloropsis,Biodiesel,Red Tilapia,Aquaculture,Organic sources,Growth performance,Biochemical analysis
https://ejabf.journals.ekb.eg/article_58081.html
https://ejabf.journals.ekb.eg/article_58081_94d92ead1110acc4d6bc84d80a4d3275.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Use of green alga Ulva lactuca (L.) as an indicator to heavy metal pollution at intertidal waters in Suez Gulf, Aqaba Gulf and Suez Canal, Egypt
437
449
EN
Fekry
A. Mourad
Hoda
Abd El-Azim
abdelazimh1968@yahoo.com
10.21608/ejabf.2019.57913
Metal pollution in the marine coastal line environment is an important topical issue in the context of ecological disturbance. The concentration of nine trace elements: Cu, Co, Ni, Cr, Mn, Zn, Cd, Pb, and Fe was determined in water, sediments and the green alga <em>Ulva lactuca </em>(L.), which collected from several sites at three main area (Suez Gulf, Aqaba Gulf and Suez Canal). The abundance of metal concentrations in algae samples was in the following order: Fe> Zn> Mn> Pb> Cu> Ni> Co> Cr> Cd, Fe> Mn>Zn> Pb> Cu> Ni> Co> Cr> Cd, and Fe> Mn>Zn> Cu> Pb> Ni> Co> Cr> Cd in Suez Gulf, Aqaba Gulf, and Suez Canal respectively. The variations at this order of abundance were according to the different in activities and metal sources in these different areas. The high uptake of metals in green alga <em>Ulva lactuca</em> suggested that this alga may be used as potential biomonitors for heavy metal pollution. The BCF value of metals in the algae/waterwas significantly higher than those of algae /sediments. The pollution indicator of Contamination Factor (BCF) was calculated to determine the degree of metal pollution in the marine coastline and the contribution of anthropogenic influence. Significant (p≤0.05) inter-elemental positive-correlations were observed between most studied metals, as well as negative-correlations between a few of them. Overall, the comparison of heavy metal contents with seawater and sediment samples in the <em>Ulva </em>species showed that <em>U. lactuca </em>is a suitable plant for biomonitoring studies.
Heavy metals,Ulva lactuca,Biomonitoring,Suez Gulf,Aqaba Gulf,Suez Canal
https://ejabf.journals.ekb.eg/article_57913.html
https://ejabf.journals.ekb.eg/article_57913_3ab55909b4f19933165a52236cfeb339.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Feeding on phytoplankton profile of two African Cichlids in large reservoir, Lake Nasser, Egypt
451
464
EN
Abd-Ellatif
M. Hussian
Walid
Aly
walid_taher@hotmail.com
Hanaa
H. Morsi
10.21608/ejabf.2019.57921
This study was carried out in 2016 to investigate the feeding on phytoplankton profile of the Nile tilapia (<em>Oreochromis niloticus</em>) and mango tilapia (<em>Sarotherodon galilaeus</em>) inhabiting Lake Nasser, and its relation to their fisheries biological parameters. Phytoplankton Preference index (PPI), Index of Relative Importance (IRI), and Straus Linear index were used to investigate the feeding patterns of the two species in the lake. Moreover, some fish biological parameters of the two species were determined in the lake different areas. The results showed that <em>O. niloticus </em>and <em>S. galilaeus </em>feed mainly on the same phytoplankton items. Bacillariophyceae was identified as the most desired phytoplankton item to <em>O. niloticus</em> (IRI = 12.53) and <em>S. galilaeus </em>(IRI=18.28). Both fish specieswere more selective to five species from Bacillariophyceae and five species from Chlorophyceae, while they were more avoidant to four speciesfrom Cyanophyceae at all lake’s areas. The results also showed that the main fisheries biological parameters are varied significantly between the two species and through lake different areas. This study concluded that the variation in fisheries biological parameters in Lake Nasser is not related to the pattern of feeding on phytoplankton but is led by other factors (e.g. fishing practices).
Lake Nasser,Fisheries,feeding,phytoplankton,Oreochromis niloticus,Sarotherodon galilaeus
https://ejabf.journals.ekb.eg/article_57921.html
https://ejabf.journals.ekb.eg/article_57921_232da43d2bf457d83bb495a2dc4e9c86.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Water Pollution Monitoring in Idku Lake (Egypt) using Phytoplankton and NSF-WQI
465
481
EN
Abdel-Aziz
M. Radwan
Mahmoud
A. Abdelmoneim
Afifi
I. Basiony
Muhammad
A. El-Alfy
10.21608/ejabf.2019.57161
Lake Idku suffers from pollution from different sources; either agricultural or municipal wastes. It faces tremendous ecological stresses due to the environmental changes and threats originated from discharges of drains. So, the aim of the present study is to assess its pollution status according to the phytoplankton species distribution and water quality index. Eight water samples were collected from the lake, preserved and analyzed. The highest total count of phytoplankton was 1,865,000 unit L<sup>-1</sup> is at station 4 (at the southern part of the lake), while the lowest was in front of El-Boughaz. Phytoplankton species were belonging to four divisions namely; Euglenophyceae, Chlorophyceae, Bacillariophyceae and Cyanophyceae.
The most abundant genera located at the highly polluted zones were <em>Euglena </em>spp. and <em>Phacus </em>spp.; at stations 4 and 7 (in front of El-Khairy drain); this is mainly due to drain wastes. <em>Scenedesmus </em>spp. (Chlorophytes), <em>Cyctotella </em>spp<em>.</em> and <em>Nitzchia </em>spp. (Bacillariophyceae), <em> Microcystis</em> spp. and <em>Chroococcus </em>spp<em>. </em>were the most dominant at these stations, which are characterized by high levels of pollution. Members of euglenoids (<em>Phacus </em>spp<em>.</em> and <em>Euglena </em>spp.) were the most indicators to the pollution especially at stations 4 and 7 nearby drains, where they represented the main components of the total count of phytoplankton and characterized by high levels of ammonia and organic carbon. This was confirmed from the correlation matrix between phytoplankton with phosphate and ammonia. The national sanitation foundation water quality index (NSF-WQI) gives an indication to medium water quality status in lake Idku and refers to low value nearby El-Khairy drain that needs more treatment before discharging into the lake.
Lake Idku,phytoplankton,NSF-WQI,pollution,El-Boughaz,El-Khairy drain
https://ejabf.journals.ekb.eg/article_57161.html
https://ejabf.journals.ekb.eg/article_57161_8ea128773baa09f4e280ad890f5f6e38.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
18
Molluscicidal effect of some red and green marine algae on Lymnaea natalensis
483
490
EN
Abd El-Halim
A. Saad
Mohey
A. Hassanain
Eman
M. Darwish
Eman
H. Abdel-Rahman
Setaita
H. Sleem
Raafat
M. Shaapan
10.21608/ejabf.2019.60546
Marine algae are economically important aquatic photosynthetic organisms act as a source of highly bioactive metabolites that might be useful against predators and parasites. In the present study, aqueous and ethanol extracts of four algal species of marine algae; <em>Pterocladia capillacaea </em>(<em>P. capillacaea</em>),<em> Jania</em> <em>rubens </em>(<em>J.</em> <em>rubens</em>),<em> Ulva lactuca </em>(<em>U. lactuca</em>),and<em> Enteromorpha intestinalis</em> (<em>E. intestinalis</em>) were tested for their lethal effect on <em>Lymnaea natalensis</em> (<em>L. natalensis</em>) snail, the intermediate host of the trematode parasite;<em> Fasciola gigantica, </em>(<em>F. gigantica</em>). Preliminary experiments were done to determine the molluscicidal toxicity of different concentrations of aqueous and ethanol algal extracts against the studied snail. Five concentrations of aqueous and ethanol extracts; 100, 200, 300, 400 and 500 ppm for each algal species were used. LC<sub>50</sub> for each extract was calculated daily until the end of the experiment. It is clear from the results that molluscicidal effect of algal extracts is concentration-dependent. The most potent extracts as proved by calculated LC<sub>50</sub> are <em>P. capillacaea</em> and <em>J. rubens </em>aqueous extract (red algae); 111.3 and 127 ppm respectively and <em>U. lactuca</em> ethanolic extract (green algae) 121 ppm. The current study introduces marine algae of promising molluscicidal activity on <em>L. natalensis</em> snail. <em>P. capillacaea </em>and <em>J. rubens</em> aqueous extracts and <em>U. lactuca</em> ethanolic extract are the most potent and highly significant ones in the net reproductive rate and reduction. Further investigations for isolation of active principals of the algal potent extracts for evaluation as molluscicides and oranthelmintics are necessary required.
Marine algae,Lymnaea natalensis,Molluscicide,Fasciola gigantica,bioactive metabolites,Ulva lactuca,Jania rubens
https://ejabf.journals.ekb.eg/article_60546.html
https://ejabf.journals.ekb.eg/article_60546_099553a2a4d275318c18097cbde4b7cd.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Temporal variations and edge effects on polychaetes in continuous and fragmented seagrass beds in northern Red Sea, Egypt.
491
502
EN
Walaa
M. Shaban
Salah
E. Abdel-Gaid
10.21608/ejabf.2019.57894
The present study describes the structure and seasonal distribution of polychaete assemblages inhabiting seagrass beds of <em>Halphila</em> <em>stipulacea</em> species in Abo Monkar Island coast, Red Sea, near Hurghada city, during the period from mid-April 2016 to mid-January 2017. Seasonal samples of seagrass canopies and roots from the edge and center of 3 different sized seagrass patches were examined for their polychaetes content to figure out the effect of different habitat variables on the abundance and diversity of polychaetes. Such variables comprise habitat fragmentation, edge effects and microhabitat nature beside the effect temporal variation. <br /> Overall, 35 polychaete species belong to 18 families were recorded, from all different seagrass patches with a comparable temporal distribution in 2 main marked seagrass habitat categories involving the canopy and root. Results indicated that large seagrass patches harbor higher polychaete’s abundance than medium and small seagrass patches in seagrass canopies microhabitat especially in warm seasons, which promote the assumption of the negative effect of seagrass fragmentation, which become positively correlated with the increasing of water temperature and become more noticeable in the summer season. Reduction of habitat size led to reducing the polychaetes species richness in both seagrass canopies and roots. Total polychaetes abundance is relatively increased toward the patch’s edge with the increasing of temperature whereas such animals tend to colonize patch’s center in the winter season (in seagrass canopy microhabitat) as well as root microhabitats. However, polychaetes species richness was markedly increased in the patch-edge habitat only in seagrass canopies in only large continuous patch summer and spring seasons recording 19 and 20 species respectively. Our findings suggested that polychaete species tend to migrate toward the patch center or seagrass roots microhabitats whenever temperature and vegetation cover is reduced.
Polychaeta,Seagrass,Halphila stipulacea,Red Sea,Abo Monkar Island,Fragmentation,Edge effect
https://ejabf.journals.ekb.eg/article_57894.html
https://ejabf.journals.ekb.eg/article_57894_c1b285b4aaaadfb5cb4596e34f8f229c.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
10
New records, conservation status and pectoral fin description of eight shark species in the Egyptian Mediterranean waters
503
519
EN
Walaa
M. Shaban
Mohamed
A. M. El-Tabakh
10.21608/ejabf.2019.57896
For a taxonomical purpose, the present study described and analyzed the pectoral fin shape and measurements of sharkspecimens, collected from the Egyptian Mediterranean Sea waters at Alexandria, during the period from May 2017 to June 2018. Morphology and morphometric fin characters were used taxonomically to differentiate between shark species via photo program analysis. After confirming the identification of sharks, a list of shark species in the Egyptian Mediterranean waters was given with emphasize on new record species as well as the conservation status of each species.
Results showed that the collected specimens belong to eight species from different six families belonging to four orders. Species-list of sharks in this study including; <em>Heptranchias perlo</em>, <em>Hexanchus griseus</em>, <em>Squalus megalops</em>, <em>Centrophorus uyato</em>, <em>Oxynotus centrina</em>, <em>Squatina squatina</em>, <em>Isurus oxyrinchus</em> and <em>Isurus paucus</em>. By comparing the present findings with the previous studies,three shark species out of these eight species were considered as new records in the Egyptian Mediterranean waters. These new records are <em>Heptranchias perlo, Squalus megalops </em>and <em>Isurus paucus</em>.According as the global assessment of the IUCN (2018) red list,<em> Heptranchias perlo </em>and <em>Hexanchus griseus </em><em>are </em>reported as near threatened species; while <em>Oxynotus centrina</em> considered as vulnerable species. <em>Isurus oxyrinchus </em>and<em> Isurus paucus</em> mentioned as endangered species. However, <em>Squatina squatina</em>is critically endangered. On the other hand, data was insufficient to state the situation of <em>Squalus megalops</em> and <em>Centrophorus uyato.</em>
The morphological aspects of pectoral fins, for these eight shark species, were greatly varied in shape that proved the potential capability to use this new technique as an important identification and classification tool. The statistical analysis of morphometric ratios also supports this proposition and shows a significant variance between investigated species. Our study attempted to add more update information on shark pectoral fin morphological and dimensional scaling.
Shark,Pectoral fin,Morphometric analysis,new record,Conservation status,Mediterranean Sea,Egypt
https://ejabf.journals.ekb.eg/article_57896.html
https://ejabf.journals.ekb.eg/article_57896_bd8dfcbf97568263be11092b996bef04.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
10
Assessment of phytochemical components, proximate composition and antioxidant properties of Scenedesmus obliquus, Chlorella vulgaris and Spirulina platensis algae extracts
521
526
EN
Ghadir
A. El-Chaghaby
Sayed
Rashad
sayed_rashad79@hotmail.com
Shereen
F. Abdel-Kader
El-Shimaa
A. Rawash
Muhammad
Abdul Moneem
10.21608/ejabf.2019.57884
In recent decades, natural antioxidant alternatives have become a trending topic for replacing artificial antioxidants. Microalgae have been reported to display interesting bioactive properties and their antioxidant activity is one of them. This study aims to evaluate the antioxidant capacity, phytochemical constituents and proximate composition of three microalgae <em>Scenedesmus obliquus, Chlorella vulgaris </em>and<em> Spirulina platensis</em>. The performed preliminary phytochemical analysis of the algae extracts revealed that they contain good amounts of bioactive compounds. The results showed that the highest total antioxidant activity found was (3720.67 mgAAE/100g) in <em>Spirulina platensis</em>, followed by <em>Chlorella</em> <em>vulgaris</em> (2794.80 mgAAE/100g). The lowest activity was noticed for <em>Scenedesmus obliquus</em> (1718.53 mgAAE/100g). As for total phenolic content, <em>Spirulina </em>recorded the highest phenolic content (2238.46 mgGAE/Kg.), followed by <em>Chlorella</em> (710.33mg GAE/Kg.), and then <em>Scenedesmus</em> (511.20 mgGAE/Kg). The total flavonoids content of algal extracts expressed as mgQE/Kg varied from (548.66) for <em>Chlorella</em> <em>vulgaris</em>, (142.23) for <em>Spirulina platensis</em> to (66.56) for <em>Scenedesmus obliquus</em>. The proximate analysis results indicated high values of protein for <em>Spirulina platensis</em> (53.30 % dry wt.) whereas the highest fat, ash and moisture percentages were recorded by <em>Scenedesmus obliquus </em>(15.13, 15.07 and 2.57, respectively).
Antioxidant activity,Phytochemical,microalgae,Total phenols,proximate composition
https://ejabf.journals.ekb.eg/article_57884.html
https://ejabf.journals.ekb.eg/article_57884_329ccb80f60ac3ac5445b8cf6cb1ac4a.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
10
Water Quality Assessment of the northern part of Suez Gulf (Red Sea, Egypt), using Principal Component Analysis.
527
538
EN
Alaa
I. Khedr
Yosry
A. Soliman
Esaam
F. El-Sherbeny
Mohamed
A. Hamed
Mohamed
A. Ahmed
Mohamed
E. Goher
10.21608/ejabf.2019.58410
Suez bay is a large harbor in the northern part of Suez gulf at the south entrance of the Suez Canal, It is subjected to different sources of pollution. The present study was achieved to assess the physicochemical parameters, nutrient salts and Water Quality Index (WQI) in the Suez Bay. The annual mean range of water temperature, pH, salinity, dissolved oxygen, oxidizable organic matter, biological oxygen demand, total suspended solids, ammonia, nitrite, nitrate, and dissolved inorganic phosphate and silicate was;23.69-25.11ºC, 7.97-8.11, 40.89-41.55‰, 6.92-9.09 mgO<sub>2</sub>L<sup>-1</sup>, 7.57-9.60 mgL<sup>-1</sup>, 3.00-4.00mgO<sub>2</sub>L<sup>-1</sup>, 17.75-27 mg L<sup>-1</sup>, 4.35-9.28 µmolL<sup>-1</sup>, 1.56-4.14 µmolL<sup>-1</sup>, 5.15-12.99 µmolL<sup>-1</sup>; 1.26-2.43µmolL<sup>-1</sup>and 4.65-8.00 µmolL<sup>-1</sup>, respectively. The N:P ratio fluctuated between 2.95 and 39.17 with main value of 16.14 indicating that the different sites in the northern part of the Suez Gulf are, either, N limited or P limited or N/P co-limited. Based on the Principal Component Analysis Data, the hot spots (the sites are more polluted) include Al-Adabyia, Al-Adabyia Effluent, Textile Egypt Eran Company and Attaka Power Station, respectively.
Water Pollution,Water quality assessment,Seasonal variations,Suez Gullf,Principal component analysis
https://ejabf.journals.ekb.eg/article_58410.html
https://ejabf.journals.ekb.eg/article_58410_f0ba390eacee25f3565991cb3bb2b845.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
18
Spatial and temporal variations of heavy metals accumulation in some macroalgal flora of the Red Sea
539
549
EN
Amany
G. Madkour
Sara
H. Rashedey
Mahmoud
A. Dar
10.21608/ejabf.2019.60548
The average contents of Zn, Cd, Cu, Co, Fe, Mn and Ni were measured seasonally in the ashes of <em>Caulerpa racemosa, Cystoseira myrica, Digenea simplex, Hormophysa cuneiformis, Padina pavonica</em> and <em>Sargassum cinereum</em> using Flame Atomic Absorption Spectrometry (AAS). The studied species were collected from three different sites along the northern part of the Red Sea coast during 2017.<em> Cystoseira myrica</em> recorded the highest Fe average (575.88 µg/g dry wt.) and Mn (164.12 µg/g dry wt.) in summer at Site II, <em>Caulerpa racemosa</em> recorded the highest Cu average (91.10µg/g dry wt.) at Site I in autumn, meanwhile <em>Sargassum cinereum</em> showed the highest averages of Zn and Co (33.88 and 16.56 µg/g dry wt.) in spring at sites II and III respectively. The highest averages Ni and Cd (10.46, 2.05 µg/g dry wt.) were observed in <em>Padina pavonica</em> at Site III in summer and spring seasons respectively. The obtained data indicated that the studied macroalgae have significant differential abilities to accumulate a certain heavy metals under the local conditions and it can be used as a good target for monitoring metals pollution in marine waters.
Macroalgae,Heavy metals,bioaccumulation,metals pollution,Red Sea
https://ejabf.journals.ekb.eg/article_60548.html
https://ejabf.journals.ekb.eg/article_60548_6ee4fb8a4adba94abce8eb54d21e283c.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Antimicrobial activities of five bacterial isolates associated with two Red Sea Sponges and their potential against multidrug-resistant bacterial pathogens
551
561
EN
Haiam
M. Aboul-Ela
Nashwa
F. A. Azzam
Mohamed
A. Shreadah
Michelle
Kelly
michelle.kelly@niwa.co.nz
10.21608/ejabf.2019.57580
Sponges are sessile animals and important filter feeders belonging to the phylum Porifera. These organisms have developed efficient defense mechanisms, harboring bacterial communities capable of producing bioactive compounds. These compounds may aid in antibiotic production research since they were shown to be active against bacteria of medical importance. The current study aimed at the isolation and identification of some sponge-associated bacteria and to evaluate their potential as antimicrobial producers. Five Gram-positive bacterial isolates were isolated from the two sponge species; <em>Ircinia echinata and Amphimedon sp</em>., collected from the Egyptian coast of the Red Sea on Egypt (Hurghada). The 5 bacterial isolates were coded as HA1, HA2, HA3, HA4, and HA5, and identified by 16S rDNA analysis as <em>Bacillus</em> sp., <em>Lysinibacillus</em> <em>boronitolerans</em>, <em>Planomicrobium</em> <em>flavidum</em>, <em>Bacillus</em> <em>safensis, </em>and <em>Bacillus</em> <em>pumilus</em>; respectively. The bacterial isolates were evaluated for their antimicrobial activity as well as multidrug-resistant pathogens. The results revealed that three of the isolates had strong antimicrobial potential towards multidrug-resistant bacteria. Meanwhile, two isolates showed no vast antimicrobial potential. These findings suggested that the marine bacteria may represent a promising source of antimicrobial agents, as an important strategy for developing alternative therapies for treating infectious diseases caused by multidrug-resistant bacteria.
antimicrobial activity,Red Sea,multidrug resistance,sponge bacteria,Phylogenetic analysis
https://ejabf.journals.ekb.eg/article_57580.html
https://ejabf.journals.ekb.eg/article_57580_67fba3ec6a1f15973357abd0b5071473.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Application of DNA barcoding for identifying potential biotechnological candidate organisms from the River Nile, Egypt.
563
575
EN
Khaled
Mohammed-Geba
https://orcid.org/00
khaledmohammed@science.menofia.edu.eg
Mansour
Galal
Gamalat
Y Osman
Mona
M Soliman
10.21608/ejabf.2019.62580
Ciliated protozoa play many fundamental roles in the aquatic environments where they thrive. They mediate the microbial loop of the universal food web, control the surrounding organisms, and act as biomarkers for water quality, beside some capability for the production of bioactive compounds. Identification of different ciliate species is chiefly based on morphological taxonomy. In order to develop molecular tools that facilitate the exploration of freshwater Nile ciliates, a direct, 18srDNA-based PCR assay was tuned up. This assay was tested for DNA-barcoding of some species that prevail the Nile in Mansoura City in the North of Egypt. The resulting sequences were applied to design new species-specific PCR assays for detection of density of these ciliates in River Nile. Using both newly-designed primers and assays, the top identified species were <em>Euplotes woodurffi, Halteria grandinella, </em>and <em>Coleps hirtus.</em> The species-specific primers produced variable-sized PCR amplicons, with densities that were at least correlated by 95 % with the real species count in the riverine water. The newly designed molecular tools are expected to facilitate the exploration and quantification of those species in different aquatic habitats where they exist, adding a major contribution to future efforts for exploiting them as resources for blue biotechnology.
Ciliated Protozoa,DNA barcoding,River Nile,Euplotes woodurffi,Halteria grandinella
https://ejabf.journals.ekb.eg/article_62580.html
https://ejabf.journals.ekb.eg/article_62580_1b7dafaa18dba85f5061360667c46da1.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Fisheries status of the bogue Boops boops (Linnaeus, 1758) in Algerian East Coast (Western Mediterranean Sea)
577
589
EN
Amina
T. Dahel
Mounira
Rachedi
Mardja
Tahri
mardja.tahri@yahoo.fr
Nadira
Benchikh
nadira.benchikh@yahoo.fr
Assia
Diaf
diaf.assia@yahoo.fr
Abdallah
B. Djebar
10.21608/ejabf.2019.60554
This study is the first that deals with the stock status of the bogue <em>Boops boops</em> (Linnaeus, 1758) in the Eastern Algerian coast (Western Mediterranean). It aims is to estimate the important parameters needed to evaluate the dynamics of the stock of this species which is economically important resource in Algeria. The FiSAT II software has been used for data analysis. The total length and weight of the fishes sampled ranged from 10.1 to 30.9 cm and from 13.47 to 268.15 g, respectively. The longevity has been estimated at 5 years. The parameters of von Bertalanffy growth curve were L∞ = 32.03 cm, K = 0.28 yr<sup>-1</sup>, t<sub>o</sub> = -1.13 years and ɸ' = 2.45. The length-weight relationships was described by parameters a = 0.016 and b = 2.815, reflecting a trend towards negative allometric growth. The total mortality (Z), natural (M) and fishing (F) mortalities were 1.03, 0.37 and 0.66 yr<sup>-1</sup>, respectively. The current exploitation rate (E) of the species was 0.64. The relative yield per recruit analysis (Y’/R) from the Beverton-Holt showed that the current level of exploitation is significantly higher than E<sub>max </sub>and E<sub>0.5</sub> (0.54 and 0.32 respectively), indicating that the population is overexploited and suffers from fishing pressure. For sustainable management of this resource, the current exploitation rate should be reduced by 50%.
Population dynamics,Mediterranean,Fishing,Boops boops,yield per recruit,MSY,Algeria
https://ejabf.journals.ekb.eg/article_60554.html
https://ejabf.journals.ekb.eg/article_60554_218ccf2c9484ebbf139035f8c023e190.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
22
Detection and removal of free-living amoebae in two different facilities for drinking water by culture and PCR
627
637
EN
Ahmad
Z. Al-Herrawy
Mohamed
A. Marouf
Nora
R. Zahglol
Mahmoud
A. Gad
10.21608/ejabf.2019.60998
Conventional drinking water treatment plants (CDWTPs) and compact units (CUs) are the main 2 types of drinking water treatment using freshwater as a source for drinking water in Egypt. The Egyptian standards for drinking water denied the presence of any type of living protozoa in drinking water produced for human use.<br /> In the present study, raw and finished water samples were separately collected from a CDWTP and a CU in Giza governorate, Egypt. Samples were separately concentrated through nitrocellulose membrane filters (0.45µm pore size). Potentially pathogenic free-living amoebae (FLAs) were detected in the concentrates by cultivation and PCR.<br /> By culture and microscopy, five genera of free-living amoebae (<em>Acanthamoeba, Vahlkampfia, Hartmannella, Naegleria </em>and <em>Vannella</em>) were encountered from inlet water samples of the 2 treatment systems. Obtained data declared that 87.5% and 91.7% of inlet water from CDWTP and CU, respectively contained potentially pathogenic FLAs that were also isolated from 20.8% and 45.8% of finished water samples from CDWTP and CU, respectively. Of the isolated FLAs from inlet water samples, <em>Acanthamoeba</em> were detected in finished water samples of both CDWTP and CU, while <em>Hartmannella</em> were isolated from finished water of only CU. Removal of FLAs reached 76.2% in CDWTP, while it reached only 50% in CU. Molecularly, only three genera were encountered representing <em>Acanth-amoeba,</em> <em>Hartmannella </em>and <em>Naegleria </em>but with a lower incidence than that revealed by the culture method.<br /> In conclusion, inlet water samples from both CDWTP and CU contained potentially pathogenic FLAs. Although CDWTP was more effective than CU in removing free-living amoebae, still some of these organisms could be detected in finished water and thus cause health risk hazards to consumers
Amoebae,Microscopy,PCR,Drinking water,treatment plant,compact unit
https://ejabf.journals.ekb.eg/article_60998.html
https://ejabf.journals.ekb.eg/article_60998_ff68923723ab4fb63b6981110b7f50e0.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Biological treatment of ammonia using biofloc system for Oreochromis niloticus fish
639
657
EN
Nasr
M. Ahmed
Nasser
S. Flefil
Safaa
I. Tayel
Soaad
A. Mahmoud
Abdel-Ghany
Soliman
abdosoliman1@yahoo.com
10.21608/ejabf.2019.60912
This study aimed to estimate the effect of biofloc technology (BFT) implementation on water quality and production performance of Nile tilapia (<em>Oreochromis niloticus</em>) using different concentrations of ammonia and attempt for treatment of excess ammonia by biofloc system with fixed temperature, pH and dissolved oxygen. The improvement and organization of phytoplankton communities in each case was monitored. The hematological and histological alterations of studied fish were also noticeable. Phytoplankton communities developed in this study were dominated by Chlorophyceae followed by Cyanophyceae, Bacillariophyceae and Euglenophyceae.<br /> The collected fish were divided into five groups; the first group was left as the control, the second and third groups were supplemented with ammonia (0.25 LC<sub>50</sub>, 0.50 LC<sub>50</sub>) and the fourth and fifth groups were cultured under biofloc system (0.25 LC<sub>50</sub>, 0.50 LC<sub>50</sub>). The results revealed that the phytoplankton used in the biofloc system gradually converted ammonia into nitrate. Hematological studies revealed that the studied biochemical parameters of blood obtained from fish cultured under biofloc system were very close to that of the control. Also, histological studies showed that fish cultured under biofloc system appeared close to recovery and similar to that obtained from control. In conclusion, phytoplankton in the biofloc system improves water quality and production performance of cultured fish by enhancing nitrification and transformation, of ammonia (toxic) into nitrate (non-toxic).
Biofloc system,Oreochromis niloticus,phytoplankton,histopathology,hematology,Nitrification,ammonia
https://ejabf.journals.ekb.eg/article_60912.html
https://ejabf.journals.ekb.eg/article_60912_7cc1d5b37677f7ee3dc3c3c649c163e3.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Chemical composition and water quality of some rivers of the sverdlovsk oblast (Ural, Russia)
659
666
EN
Flefel,
H. E.
Nokhrin,
D. Yu.
Donnik,
I. M.
10.21608/ejabf.2019.60919
The water quality of a river is very important as it is using for drinking and domestic purposes, agriculture and aquatic life including fish and fish farming. The concentration of the major ions (Cl<sup>-</sup>, SO<sub>4</sub><sup>2-</sup>, K<sup>+</sup>, Na<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>), nitrogen and phosphorus compounds (NH<sub>4</sub><sup>+</sup>, NO<sub>2</sub><sup>-</sup>, NO<sub>3</sub><sup>-</sup>, HPO<sub>4</sub><sup>2-</sup>), ions Ba<sup>2+</sup>, Sr<sup>2+</sup> , Heavy metals and trace elements (Ba<sup>2+</sup>, Fe, Cd, Co, Si, Mn, Cu, Ni, Pb, Sr<sup>2+</sup>, F<sup>-</sup>, Zn), concentration was determined. The results showed thatgeneral indicators<strong>, </strong>according to the chromaticity value, samples of different rivers differed very strongly. According to the value of mineralization, the water of all samples was fresh. According to the cationic composition, 7 samples had calcium type and one (Pozarishka) had a mixed type. Also, the content of organic matter in the samples was generally significant. The lowest oxidation values were recorded in the samples of the Ufa river network (Nos. 6 and 7), The highest in the water of Iset river. The concentration of most elements in the water exceeded the standard values.
Sverdlovsk oblast,Ural,Rissia,Chemical composition,water quality,Heavy metals,Biogenic compounds
https://ejabf.journals.ekb.eg/article_60919.html
https://ejabf.journals.ekb.eg/article_60919_09b0d95c982ef2f6581365d7d29c42a5.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
11
01
Characterization and Bioremediation potential of marine psychrotolerant Pseudomonas spp. isolated from the Mediterranean Sea, Egypt.
669
683
EN
Hanan
M. Abd-Elnaby
Gehan
M. Abou-Elela
Halla
Hussein
hhussian5@yahoo.com
Hanan
A. Ghozlan
Soraya
A. Sabry
10.21608/ejabf.2019.63537
Fourteen psychrotolerant <em>Pseudomonas</em> strains were isolated from seawater and sediments in the Mediterranean Sea, Egypt, using culture-dependent techniques. Genotypic characterization for the fourteen strains was performed using 16S rDNA sequence analysis. The <em>Pseudomonas</em> strains were screened for some physiological, and biochemical characters, also resistance to some antibiotics and heavy metals were tested. Moreover, heavy metals bioaccumulation and azo-dyes removal were estimated. All tested <em>Pseudomonas</em> strains were able to resist and accumulate several metals (Pb<sup>2</sup>+, Cu<sup>2+</sup> and Cd<sup>2+</sup>) with variable degrees, depending on bacterial strains and metal ion species. The highest tolerance (MICs) was observed with lead ions as all strains grew in presence of 750-800 ppm of lead, also, lead ions were easier to bioaccumulate than the other metals, while cadmium bioaccumulation was relatively low with respect to the other two metals. <em>Pseudomonas</em> sp.H69A was the most potent strain in the accumulation of different metals. It supports the highest accumulated values of lead and cupper (2.95 and 1.837 mg /g fresh cells, respectively). The <em>Pseudomonas</em> strains were monitored for their ability to decolorize three different azo-dyes (fast orange, methanil yellow and acid-fast red). All <em>Pseudomonas</em> strains achieved powerfull decolorization activity with the tested dyes. The maximum decolorization activities were recorded in fast orange. <em>Pseudmonas</em> sp. H26S recorded the highest decolorization percentages (91%) with fast orange and their biosorption capacity was 4.8 mg/g.
Psychrotolerant,Pseudomonas sp,Mediterranean Sea,genotype,Heavy metals,azo-dyes
https://ejabf.journals.ekb.eg/article_63537.html
https://ejabf.journals.ekb.eg/article_63537_fc01b10c85b18139183fcbf044c99ca3.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
12
01
Community structure of crusteacean Zooplankton in the River Nile at Esna Barrages, Upper Egypt.
685
695
EN
Ahmad
H. Obuid-Allah
Ahmed
S. Moustafa
Wafaa
A. Mohammad
El-Amier
H. M. Hussien
Azza
M. Gaber
10.21608/ejabf.2019.63538
Zooplanktons are major components in the trophic dynamics of freshwater ecosystems. The present study was carried out on the River Nile at Esna barrages, Upper Egypt which located between 25°19'03.5"N and 32°33'19.5"E. Samples were collected from six sites up and down stream of the barrage during one year extended from October 2018 till September 2019. The study revealed that the total number of zooplankton community collected was (36367 indv/m<sup>3</sup>). The collected zooplankton could be assigned to three different groups (Cladocera, Copepoda, and Ostracoda) which included 37 species belonging to 27 genera that fall in 10 families. The highest value of total abundance of zooplankton was recorded during winter and the lowest value was recorded during summer. The total density of zooplankton community was recorded at site 1 which is located upstream (9396 indv/m<sup>3</sup>), while the lowest value was recorded at site 4 (downstream) (4186 indv/m<sup>3</sup>). Cladocera was the dominant group; it represented about 87.5% of the total density followed by Copepoda and Ostracoda. Taxa richness reached the highest peak value (29 taxa) at upstream, while the highest peak value was (25 taxa) at downstream. Shannon- wiener’s diversity index ranged between (2.06) and (2.33) at upstream while it ranged between (1.95) and (2.45) at downstream.
Zooplankton,Crustacea,Community structure,Esna barrage,Upper Egypt,River Nile
https://ejabf.journals.ekb.eg/article_63538.html
https://ejabf.journals.ekb.eg/article_63538_dbd08421d444c2f2e8e201ce40edf397.pdf
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
23
4
2019
09
30
Applying Geospatial Technology in Assessing the Coastal Vulnerability of Zaranik Protectorate to Sea-Level Rise.
697
719
EN
Wiame
W.M. Emam et al.
10.21608/ejabf.2019.202267
Considering Egypt’s plan to develop eco-tourism within the Zaranik Protectorate, ensuring the balance between the protectorate’s environmental protection and economic development has become an urgent need to maintain the protectorate’s sustainability. However, the protectorate lacks monitoring studies as well as assessing its vulnerability to sea-level rise (SLR) due to shoreline erosion. Accordingly, this study aimed at monitoring the shoreline dynamics of the protectorate over a period of 32 years (1987-2019) using geospatial technology as well as assessing its vulnerability to SLR due to shoreline erosion. The study divided the protectorate’s shoreline (32 km) into three zones (eastern, middle, and western). Digital Shoreline Analysis System (DSAS) tool was integrated into ArcGIS software to facilitate analyzing the historical shoreline dynamics for both long- (1987–2019) and short-term time intervals (1987–1998, 1998–2001, 2001–2014, 2014–2015, 2015–2016, 2016–2017, 2017–2018, and 2018–2019) from six Landsat and three Sentinel images. Six coastal parameters were used in estimating the coastal vulnerability index (CVI). Moreover, a coastal vulnerability map was generated to identify and highlight areas most susceptible to inundation by seawater along the protectorate. Results of shoreline analysis revealed that, during 1987–2019, the protectorate’s shoreline exhibited high erosion with an average rate of -1.03 ± 3.9 m/yr. Moreover, the tidal action, the prevailing wave directions, the oblique orientation of the shoreline, and the azimuth angle of the sandbar have all contributed in the eventual closure of Boughaz El-Zaranik since 2017. CVI results revealed that the entire coast is under the impact of very high vulnerability to SLR due to shoreline erosion. The vulnerability maps generated in the current study can be used to help in formulating the strategies required in SLR adaptation and mitigation along Zaranik Protectorate’s coast.
Satellite Images,DSAS,Zaranik protectorate,Sea-level rise (SLR),Erosion/Accretion,Coastal slope,Geomorphology,North Sinai
https://ejabf.journals.ekb.eg/article_202267.html
https://ejabf.journals.ekb.eg/article_202267_b51cf0e9892b824c69226de00740ce84.pdf