@article { author = {Elabd, Hiam and Hamza, Mahmoud and Shaheen, Adel}, title = {Nerocila orbignyi, Cymothoid isopoda infestation in European sea bass, Dicentrarchus labrax. Trials for treatment with evaluation of immune and antioxidative responses.}, journal = {Egyptian Journal for Aquaculture}, volume = {10}, number = {3}, pages = {1-20}, year = {2020}, publisher = {Blue Resources for Aquaculture, Environment and Society Development}, issn = {2090-7877}, eissn = {2636-3984}, doi = {10.21608/eja.2020.33013.1025}, abstract = {Cymothoid isopods cause serious infestations in fish that may adversely affect the aquaculture. Current study targeted investigating the enormous infestation of European sea bass Dicentrarchus labrax with cymothoid isopod, Nerocila species in a marine fish farm at Kafr El Sheikh Governorate, Egypt; accompanied with trials for treatment with malathion 57% at 0.15 and 0.30 mg/L concentrations and evaluation of the immune and antioxidants responses. For this purpose, 450 D. labrax were randomly collected alive during April 2020 and thoroughly examined for detection of external parasites. Malathion 57% treatment trial was carried out. Blood and tissue samples were collected from infested fish at zero-day (before malathion treatment) and at 24hrs, 48hrs, 3rd day, 4th day and 5th day (after malathion treatment). Isopods collected from infested fish were identified as N. orbigny and fish's external body surface and gills were the predilection sites. Both malathion concentrations were effective in eradicating N. orbigny and decreasing the isopod prevalence from 100 to 0% at the 5th day sampling point. Infested fish revealed improved hematological parameters (Erythrocyte counts, hemoglobin, and hematocrit readings), however leucocyte and differential cells counts showed significant decrease in infested fish. Immunological parameters (Lysozyme and IgM activities) decreased, but nitric oxide increased by time after malathion application. Nerocila is considered serious parasite in aquaculture that negatively affects fish's immune and antioxidative responses; and malathion denoted as a promising treatment to control N. orbigny in infested D. labrax.}, keywords = {Nerocila orbigny,malathion,Immune Response,antioxidants,Dicentrarchus labrax}, url = {https://eja.journals.ekb.eg/article_110920.html}, eprint = {https://eja.journals.ekb.eg/article_110920_c0b0c668f684174b912cd80a79315725.pdf} } @article { author = {salama, faiza and farag, fatma and tonsy, Hayam and abu-zeid, mohamed and ibrahim, Nabil}, title = {Using of by-products of mushroom (Pleurotus ostrateus) growing on rice straw in Nile Tilapia (Oreochromis niloticus) fingerling diets}, journal = {Egyptian Journal for Aquaculture}, volume = {10}, number = {3}, pages = {21-42}, year = {2020}, publisher = {Blue Resources for Aquaculture, Environment and Society Development}, issn = {2090-7877}, eissn = {2636-3984}, doi = {10.21608/eja.2020.34707.1027}, abstract = {The present study was carried out at the World Fish Abbassa Sharkia, Egypt with cooperation of Animal Production Research Institute (APRI) Agriculture Research Center Giza, Egypt. The study was conducted to investigate the possibility of incorporating by-products of mushroom growing on rice straw as an energy source and cheap alternative feed stuffs instead of the diets in all-male Nile tilapia, O. niloticus fingerlings Abbassa strain (G9) (6.03g±0.22g) were obtained from the World Fish. Genetic improvement program. Five experimental diets were formulated, as iso nitrogenous (30.80 % CP) and isocaloric (4325.94 Kcal/kg diet), containing 0, 5, 10, 15 and 20% of mushroom by-product T1, T2, T3,T4 and T5, respectively and fed to monosex Nile tilapia, (Oreochrom isniloticus) fingerlings with average individual weight of (6.03g ± 0.12g).Total of Fish were fed at a rate of 5 % of total biomass, tilapia were hand-fed to apparent satiation which was divided between three feeding times daily (8:00, 12:00, and 15:00 hours). The results showed no significant differences between all treatments (P>0.05) in growth performance and feed protein utilization of fish up to 20% compared with the control in Nile tilapia fingerlings diets resulted a better economic efficiency.}, keywords = {Nile tilapia,rice straw,by-products of mushroom growth performance and feed utilization}, url = {https://eja.journals.ekb.eg/article_110921.html}, eprint = {https://eja.journals.ekb.eg/article_110921_a5a48e37425b5e4b9553c07d1af3f4ad.pdf} } @article { author = {Mounes, Hossam and Mansour, Enas and Ahmed, Kareem}, title = {Effect of Azolla pinnata and Nannochloropsis oculata on growth performance and immunoresponse of Nile tilapia (Oreochromis niloticus) and its resistance to bacterial infection}, journal = {Egyptian Journal for Aquaculture}, volume = {10}, number = {3}, pages = {43-62}, year = {2020}, publisher = {Blue Resources for Aquaculture, Environment and Society Development}, issn = {2090-7877}, eissn = {2636-3984}, doi = {10.21608/eja.2020.38241.1030}, abstract = {This experiment aimed to appraise growth performance, hematological and immuno-physiological indices of Nile tilapia when fed on diets in which soybeans were partially replaced by Azolla pinnata or Nannochloropsis oculata. A control diet (basic diet) was tested against 6 practical diets (3 diets partially replaced soybean with Azolla pinnata and 3 diets partially replaced soybean with Nannochloropsis oculata at three different percentages (2.5, 5 and 7.5 %) The highest values of growth parameters were recorded in T3 (Azolla 5 %), followed by T4 (Azolla 7.5 %), T5 (Nano 2.5 %), T7 (Nano 7.5 %), T6 (Nano 5 %), T2 (Azolla 2.5 %), and then T1 (negative control). At the end of the experiment, T4 recoded the highest values of Total protein and Globulin while the lowest readings were in T3, Albumin lowest value was in T5 and the highest one accomplished in T2 with a significant differences between all treatments. For the antioxidant parameters, the negative control (T1) recoded the highest MDA value, while had the lowest values of SOD, GPX and Lysozyme. The highest values of (SOD and GPX) accomplished in T6 while the highest value of Lysozyme was recorded in T4. The challenge with A. hydrophila showed that, the highest mortality rate (80 %) was recorded in control, while the lowest one (10 %) was recorded in T3 and T4.}, keywords = {Azolla pinnata,Nannochloropsis oculata,Growth performance,Nile tilapia and immunoresponse}, url = {https://eja.journals.ekb.eg/article_110922.html}, eprint = {https://eja.journals.ekb.eg/article_110922_2d8a837c4eada3f811194700182a3ec9.pdf} } @article { author = {shokr, elsayed and Khames, Doaa and Zenhom, Mohamed and khalaf, mohamed}, title = {PHYSIOLOGICAL ASPECTS IN NILE TILAPIA UNDER EFFECT OF COPPER SULFATE TOXICITY}, journal = {Egyptian Journal for Aquaculture}, volume = {10}, number = {3}, pages = {63-80}, year = {2020}, publisher = {Blue Resources for Aquaculture, Environment and Society Development}, issn = {2090-7877}, eissn = {2636-3984}, doi = {10.21608/eja.2020.39725.1032}, abstract = {this study, Nile tilapia, Oreochromis niloticus (L.), (2 to 3g) was distributed into the four groups, control and three treated groups with copper sulfate at concentrations 5, 10 and 15 ml mol/L, according to design of experiment to four groups each group three replicate (control group) was contain 10 fish /100 L. and three treated groups with copper sulfate at concentrations 5, 10 and 15 ml mol/L for three months respectively. At the end of the experimental trial, blood samples were taken to determine the different physiological aspects. The growth parameters were affected by copper sulfate at concentrations 5, 10 and 15 ml mol/L. The high growth performance (WG. SGR and RGR) of tilapia, subject at control group and group exposed to copper sulfate at concentration 5 ml mol/L, respectively than the groups exposed to copper sulfate at concentration 10 and 15 ml mol/L, respectively. The best feed conversion ratio was obtained with control plus exposed to copper sulfate at concentration 5 ml mol/L, respectively. Also The highest values of protein efficiency ratio and protein productive were obtained with control plus exposed to copper sulfate at concentration 5 ml mol/L, respectively. The physiological aspects including erythrocyte count (RBCs), haemoglobin content (Hb) and haematocrit value (Hct) were significantly affected by exposed to copper sulfate at concentrations than control one. The overall results presented here indicate that the best growth performance of Nile tilapia was obtained at control fish.}, keywords = {Nile tilapia,growth parameters,copper sulfate}, url = {https://eja.journals.ekb.eg/article_116609.html}, eprint = {https://eja.journals.ekb.eg/article_116609_90110e36a542f38f085aa90abb9295e0.pdf} } @article { author = {Zenhom, Mohamed and Ibrahim, Ibrahim}, title = {Effect of Fenugreek Seeds By-produced meal on Growth Performance, Feed Utilization, Body Composition and Some Physiological Traits for Common Carp (Cyprinus Carpio).}, journal = {Egyptian Journal for Aquaculture}, volume = {10}, number = {3}, pages = {81-95}, year = {2020}, publisher = {Blue Resources for Aquaculture, Environment and Society Development}, issn = {2090-7877}, eissn = {2636-3984}, doi = {10.21608/eja.2020.44476.1037}, abstract = {This study was performed to investigate the effect of dietary supplementation with fenugreek seeds by-produced meal (FSM) on growth performance, feed utilization, body composition and some physiological traits of Common carp (Cyprinus carpio) with an average 10.6 ± 0.15g weights and 8.78± 0.14cm length. A 12-week feeding trial was conducted in 12 aquariums (75 – 60 – 45cm in diameters). Four experimental diets were formulated to containing 0% (Commercial diet), 10, 20 and 30% FSMby-produced. The results revealed that fenugreek seeds meal supplementation significantly enhanced the fish growth over the control group. Also, condition factor and survival rate were significantly increased with increasing FSM percentage in the diets up to 20%. Feed conversion ratio was significantly improved with increasing FSM up to 20% inclusion level. Fish feeding diets containing 20% FSM had significant increase in PER, whereas there was no significant difference in feed intake. Body protein and dry matter content was significantly increased with increasing FSM percentage in the diets until 20%, while the higher value of fat content was recorded with diet contained 10% fenugreek seeds. The higher significant plasma protein and lysozyme andlower plasma glucosewas obtained in diet containing 20%. FSM. Fish fed control diet gave the higher value of plasma glucose and the lower value lysozyme, while Fish fed 30 % FSM provided the lower value plasma protein. It could be concluded that the dietary addition of 20% of fenugreekseeds by-producedmealenhanced the growth performance of Common carp.}, keywords = {Key words: Common carp,fenugreek seeds by-produced,Growth performance}, url = {https://eja.journals.ekb.eg/article_121375.html}, eprint = {https://eja.journals.ekb.eg/article_121375_6178dd7b11f6f098ab36d337f26a67de.pdf} } @article { author = {Eid, Abdelhamid and Ali, Badiaa and Al Sayed, Khaled and Marzok, Samer and Khames, Mohamed and Khames, Doaa}, title = {Stocking density, Survival rate and Growth performance feed utilization and economic evaluation of Litopenaeus vannamei (Boon, 1931) in different cultured shrimp farms in Suez Canal Region}, journal = {Egyptian Journal for Aquaculture}, volume = {10}, number = {3}, pages = {96-114}, year = {2020}, publisher = {Blue Resources for Aquaculture, Environment and Society Development}, issn = {2090-7877}, eissn = {2636-3984}, doi = {10.21608/eja.2020.43323.1036}, abstract = {Two studies were conducted to evaluate growth performance, feed utilization, survival and the economic production of white shrimp (P. vannamei) in Suez Canal region. The first study was conducted in Eldebba farm in western region of Port Said Governorate collaboration with a private fish farm. The second study was conducted in Suez Canal Fish Farm with an area of 1feddans. The pond was stocked with white shrimp (P. vannamei) at the rate of 70000 P26 /feddan in eldebba Port-Saied Governorate. In Suez Canal ponds stocked with 150000 P26/ feddan white shrimp (P. vannamei) with average initial 0.002g . A good quality (38% protein) commercial feed was provided. Growth performance, feed utilization , survival and comical evaluation was the best in Eldebba farm than Suez Canal farm. It could be concluded that stocking white shrimp at density 70000/feddan was the best in terms of growth performance, feed utilization, survival and economic evaluation under this experimental conditions.}, keywords = {Litopenaeus vannamei,stocking density,water quality,Growth performance,Economic Evaluation}, url = {https://eja.journals.ekb.eg/article_121390.html}, eprint = {https://eja.journals.ekb.eg/article_121390_b490141e11c08c082a98f2ff9108e35b.pdf} }