Amal Elfeky

Suez Canal University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

EFFECT OF WATER DEPTH ON GROWTH PERFORMANCE AND SURVIVAL RATE OF MIXED SEX NILE TILAPIA FINGERLINGS AND ADULTS

Egyptian Journal of Animal Production (2013)

Mohamed A. Ali Amal Elfeky H. M. Khouraiba M. S. El-Sherif

Nile tilapia (O.niloticus) fingerlings and adult averaging (18 and 100 g in weight) respectively, were reared under 3 different depths ( 75,125 and 175cm) for 90 days to study the effect of water depth on the growth and the survival of overwintered fishes using twelve standing cages.Fish were fed on a commercial diet containing 26.58 % protein.The dissolved oxygen , temperature, pH, UIA-N and transparency of water and mortality were recorded for each cage every 15 days during the experimental period.Also, at the end of the experimental period , the fish were harvested , counted and the growth measurements ( weight and total length) were determined .The statistical analyses indicated that there were significant differences (≤0.05) in all parameters between all depths.Results showed that the final average total length, weight gain, condition factor and survival rate being the best at depth of 175 cm in both two sizes of tilapia during the cold season in Egypt.

Nile tilapia

10.21608/ejap.2013.93680

Cite

Citations (6)

Performance of Nile Tilapia (Oreochromis niloticus) Fingerlings. II. Influence of Different Water Temperatures

International Journal of Agriculture and Biology (2009)

M. S. El-Sherif Amal Elfeky

Nile tilapia (Oreochromis niloticus) fingerlings with average weight of 19.0±1.0 g were used to study the effect of different temperatures on growth performance, survival rate and some physiological parameters. The fingerlings were stocked in 12 glass aquaria (40×70×60 cm) at 15, 20, 30 and 25°C (as control) for 60 days. Diet of 26.58% protein was offered as feed. Water was changed twice daily with 100% of water size. Growth measurements of tilapia were recorded at 15 days intervals. Blood parameters were recorded at stocking and at the end of the experiment. Results showed that growth performance for tilapia was significantly (P≤0.05) decreased at 15 and 20°C. Survival rate was high at temperature 20, 25 and 30°C but mortality occurred at 15°C. Also, the feed conversion ratio (FCR) for fish increased with increasing temperature, but the difference was not significant (P≥0.05) between high temperatures (25 & 30°C), respectively. Decreasing temperature resulted in decreasing hematocrit and hemoglobin parameters, while differences were not significant (P≥0.05) from control at temperatures 25 and 30°C, respectively. The findings revealed that water temperature 25-30 o C were more suitable for culture of Nile tilapia fingerlings to obtain optimum growth performance and survival rate.

Nile tilapia

Source

Cite

Citations (47)

THE INFLUENCE OF STOCKING DENSITY ON GROWTH AND FEED UTILIZATION IN GILTHEAD SEABREAM (Sparus aurata)

Egyptian Journal of Nutrition and Feeds (2019)

A. Eid Badia A. Ali Amal Elfeky

Stocking density is considered a priority topic in aquaculture research due to its bearing on the welfare of farmed fish and the need for future recommendations governing stocking density management on fish farms. The aim of this study was to evaluate the influence of stocking density (10, 20, 30 and 40 fry/L3) on growth performance, Feed utilization and survival rate of fry gilthead seabream (Sparus aurata). The results showed that the group of fry stocked at density 30 fry/ L3 was significantly the highest final weight, weight gain, daily gain, SGR and insignificant differences in survival rate. Growth performance parameters were the highest with stocking density 30 fry/ L3 compared with stocking density (10, 20 and 40 fry/ L3), respectively. The results indicated that the best FCR, PER and FE group of fry stocked at 30 fry/ L3 than the rest of experimental groups. Stocking density also did not affect the crude protein and moisture content in body composition. But ash content was significantly highest at density 30 fry/ L3 than the rest of other stocking density (10. 20 and 40 fry/L3) groups. In contrast, total lipid was significantly highest at density 10 fry/L3 than the rest of experimental groups (20, 30 and 40 fry/L3). From the aforementioned results, it could be concluded that stocking density 30 fry/L3 had the best growth performance and feed utilization under experimental conditions.

10.21608/ejnf.2019.79440

Cite

Citations (1)

The effect of Pediococcus acidilactici probiotics supplementation in the feed of Nile Tilapia (Oreochromis niloticus) on water quality, growth performance, Hematological parameters, antioxidants, immunological responses, enzymatic Activity, and histology.

Research Square (Research Square) (2022)

El‐Sayed Hemdan Eissa Fatima S. Alaryani Marwa S. Khattab Amal Elfeky Moaheda E. H. Eissa

Abstract The effect of adding lactic acid bacteria (Pediococcus acidilactici) to the diet on water quality, feed utilization, growth, body composition, Hematological parameters, intestinal and liver histology of Nile tilapia, haemato-biochemical parameters, antioxidants, immunological responses, and Enzymatic Activity was investigated. Fish was distributed into Four groups; the control group (T0), T1 group (2.0 g), T2 group (2.5 g), and T3 group (3.0 g) of Pediococcus acidilactici per kg of diet. 25% of Water was changed daily and feed with 31% protein was added three times daily for 56 days. In probiotics-treated groups, growth performance, feed utilization, and fish biomass increased significantly compared to control. The biochemical and immunity parameters (Amylase, Lipase, and Protease activity) and villi height were significantly improved in probiotics groups. In conclusion, adding probiotics to fish diet improved all evaluated parameters

Pediococcus acidilactici

Nile tilapia

Pediococcus

Digestive enzyme

10.21203/rs.3.rs-1739135/v1

Cite

Citations (3)

Effects of dietary Spirulina platensis supplementation on growth performance, whole body composition, antioxidant activity, histological alterations, and resistance to Vibrio parahaemolyticus in Pacific white shrimp, Litopenaeus vannamei

Aquaculture Reports (2025)

Ragaa A. Ahmed Samyah D. Jastaniah Bothaina A. Alaidaroos Manal E. Shafi Ehab El‐Haroun

Litopenaeus

Spirulina (dietary supplement)

10.1016/j.aqrep.2024.102606

Cite

Citations (0)

PRODUCTION OF MEAGRE IN EARTHEN PONDS

Egyptian Journal of Nutrition and Feeds (2020)

A. Eid B. Ali Amal Elfeky Walaa K. Bazina H. D. Saleh

The present study investigated the effect of rearing the meagre, Argyrosomus regius in brackish-water pond aquaculture without using supplementary feeding in the Mediterranean area near Damietta City during June, 2017 to June, 2018, Fingerlings of mean length 13.0cm and 40.0 g weight were stocked in brackish-water pond measuring 1 feddan and 1.25 m deep at a rate of 4000 fish/ feddan in a monoculture system on natural occurring prey (natural spawned tilapia) and small shrimp. Temperature varied from 21.0 – 30.8°C; pH, 7.4– 8.9; Dissolved Oxygen (DO), 4.0 – 5.0 mg /L and salinity, 16.0 – 18.8 ppt during the study. Meagre, attained average final length 40 cm/ fish and average final weight 1500g / fish at harvest with an increment of 1460.0g/ fish and a daily gain of 4.0g/ fish. Average survival rate was 80% and net production was 4640.0kg/ feddan. The results revealed that the cost of feeds accounted for the largest proportion (68.55%) of the total cost of fish production,then fingerlings (8.56%), rent (3.35%) and labor (12.60%). This is followed by cost of fixed input and variable coast (12%). This experiment demonstrated the possibility of cultivation of A. regius as well as the higher commercial value where better net return (54.48 LE /feddan) was recorded with investment return of 23.33 LE / return LE cost. The results of the study indicated meagre as a promising candidate for the brackish water pond aquaculture.

10.21608/ejnf.2020.95840

Cite

Citations (3)

Potential Symbiotic Effects of β-1,3 Glucan, and Fructooligosaccharides on the Growth Performance, Immune Response, Redox Status, and Resistance of Pacific White Shrimp, Litopenaeus vannamei to Fusarium solani Infection

Fishes (2023)

El‐Sayed Hemdan Eissa Ragaa A. Ahmed Nadia A. Abd Elghany Amal Elfeky Saadea Saadony

The potential effects of dietary supplementation with β-1,3 glucan and fructooligosaccharides (β-1,3 GF) on antioxidant activities, immunological response, and growth performance of Pacific white shrimp (Litopenaeus vannamei) was investigated. Four diets (iso-energetic and iso-nitrogenous) with different levels of β-1,3 GF (0, 0.5, 1.0, and 1.5 g kg−1) were fed to healthy shrimp juveniles weighing 3 ± 0.5 g for 75 days. Shrimps were randomly distributed into 12 net enclosures at a density of 30 shrimp/net, and the experiment was performed in triplicate. The results revealed that long-term supplementation with 1.5 g kg−1 β-1,3 GF significantly improved shrimp weight gain, feed conversion ratio, and digestive enzyme profiles compared to the control diet group. However, there were no substantial variations in the contents of moisture, crude protein, total lipids, and ash in the muscles of shrimp fed on different diets. Surprisingly, all antioxidants (superoxide dismutase, catalase, glutathione peroxidase) and immune biomarkers (lysozyme, total hemocyte count, phenol oxidase, and respiratory burst) activities were significantly elevated with increasing levels of β-1,3 GF in the shrimp diet, and the highest values were recorded in the 1.5 g kg−1 diet groups. Challenge test results revealed that F. solani could cause a high mortality rate (86.7%) in a group fed a normal basal diet within 14 days at a dose of 5 × 104 conidia mL−1. Surprisingly, all dietary treated groups with different doses of β-1,3 GF showed high resistance against F. solani, represented by lower cumulative mortality rates (20–43.3%) compared to the control group. Moreover, most of the infected shrimp showed a typical black to brown gill lesion similar to that observed in the natural infection, where an identical fungus was successfully re-isolated from infected gills and muscles. Overall, this study recommends an appropriate incorporation level of β-1,3 GF that could enhance growth performance and improve the antioxidant activities, non-specific immunity, and disease resistance of L. vannamei, with an optimal level of 1.5 g kg−1.

Litopenaeus

10.3390/fishes8020105

Cite

Citations (29)

Performance of Nile Tilapia (Oreochromis niloticus) Fingerlings. I. Effect of pH

International Journal of Agriculture and Biology (2009)

M. S. El-Sherif Amal Elfeky

Nile tilapia (Oreochromis niloticus) fingerlings averaging 19.0±1.0 g in weight were stocked for 60 days, at different levels of pH (6, 7, 8 & 9) using 12 glass aquaria (40×70×60 cm). Tilapia were fed with diet containing 26.58% crude protein. Water was changed twice daily with 100% of water size. Growth measurement of tilapia was recorded at 15 days intervals. Blood parameters were recorded at stocking and at the end of the experiment. Results showed that growth performance was significantly (P≤0.05) decreased at pH 6 and 9, while the differences between pH 7 and 8 were not significant (P≥0.05). No mortality occurred during the whole experiment. Feed conversion ratio (FCR) increased at pH 6 and 9, since its value at the pH 6 was significantly (P≤0.05) higher than pH 9. Decreasing pH resulted in decreased hematocrit and hemoglobin values, while differences were not significant (P≥0.05) from control in pH 7, 8 and 9. It was concluded that water pH 7-8 could be more suitable to tilapia culture for optimum growth performance and survival rate.

Nile tilapia

Source

Cite

Citations (75)

A case of ectopic fascioliasis in a farmer from Mansoura City, Dakahlia, Egypt.

PubMed (1991)

el-Shazly Am I el-Desoky Amal Elfeky

Human fascioliasis is a new parasitic health problem in Egypt. This paper reports a case of ectopic fascioliasis in the right side of the pleural cavity of a farmer.

Source

Cite

Citations (3)

ENHANCING GROWTH PERFORMANCE AND FEED UTILIZATION USING PREBIOTICS IN COMMERCIAL DIETS OF NILE TILAPIA (Oreochromis niloticus) FINGERLINGS

Egyptian Journal of Nutrition and Feeds (2019)

Badiaa Ali Amal Elfeky

An experiment was undertaken to study the impact of commercial β-glucan on growth performance, feed utilization and immunomodulatory effects of Nile tilapia fingerlings. Four isocaloric and isonitrogenous diets were formulatedwith three levels of β-glucan (0, 0.6, 1.2 and 1.8%) and fed to the fish for 84 days. The tested diets were applied in 12 fiberglass tanks (80 x 60 x 60 cm) each was supplied arbitrarily with 20 Nile tilapia fingerlings with anmoderate starting body weight of 10 ± 0.20g. Generally, We found that adding β-glucan to the diet improve fish growth performance, feed conversion ratio, protein efficiency ratio and Apparent protein digestibility were enhanced for tilapia fingerlings compared to fish fed on the control diet. In terms of blood estimations no critical contrasts were identified in plasma albumin, total protein and total globulins of fish nourished on the tested diets. Conclusively, the results revealed that It is possible to include concentrations of 0.6 % of β-glucans in the diets for Nile tilapia, with detectable improvement on growth performance, feed utilization and survival.

Nile tilapia

10.21608/ejnf.2019.76355

Cite

Citations (1)