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Articles by Ehab R. EL-Haroun
Total Records ( 2 ) for Ehab R. EL-Haroun
  Ehab R. EL-Haroun
  The present study was conducted to examine probiotic treatment in the diet of African catfish Clarias gariepinus. A total of 240 of African catfish (weight ranged from 81.13 to 91.35 g) were divided in the five experimental groups. The experiment was conducted for 120 days. Experimental diets were identical in all except for the variation in probiotic levels. A probiotic (Biogen7) was used at 0% (control), 0.5% (diet 2), 1.0% (diet 3), 1.5% (diet 4) and 2.0% (diet 5) inclusion rates in the experimental diets. The growth performance and nutrient utilization of African catfish including Weight Gain (WG), Specific Growth Rate (SGR), Protein Efficiency Ratio (PER), Protein Productive Value (PPV) and Energy Retention (ER) were significantly (p#0.05) higher of fish fed diets containing 0.5% Biogen7 than for fish fed control diets. In the same trend fish fed 0.5% Biogen7 recorded the best-Feed Conversion Ratio (FCR) (p#0.05) compare to the control diet. However, among the probiotic fed groups no significant differences were recorded (p$0.05). Concerning the influence of different dietary probiotic levels on chemical proximate analysis of whole carcass, protein content was significantly higher (p#0.05) at 0.5% inclusion, while, fish fed diet containing 1.0% Biogen7 recorded the highest ash content without significant (p$0.05) difference with the other treatments. Differences were observed in carcass lipid and gross energy content with significantly lowest (p#0.05) values recorded in fish fed 2.0% Biogen7. The production performance and subsequent cost-benefit analyses clearly indicated that the diets containing 0.5% probiotic Biogen7 recorded the highest net return compared to the control diet. Based on the result of this study, it is concluded that Biogen7 positively influenced growth performance and feed utilization of African catfish as well as the economic efficiency.
  M.A. Kabir Chowdhury , Ashraf M.A.S. Goda , Ehab R. El-Haroun , Mohamed A. Wafa and Shady A. Salah El-Din
  A growth trial was conducted to investigate the effect of different dietary protein and feeding times on growth performance and feed utilization of freshwater prawn Macrobrachium rosenbergii Post-Larvae (PL). The experiment was conducted in outdoor concrete pens (6 m-3) for 84 days. Post-larvae with an average weight of 20.8±0.17 mg were stocking at 30 PL m-3 in each pens. Two isocaloric (~15.0 MJ DE kg-1) test diets were formulated to contain two different dietary protein 35 and 40%. The daily feeding level was divided into equal two amounts and fed twice a day at three different feeding times (9:00; 12:00 h); (9:00; 15:00 h) and (9:00; 18:00 h). The highest survival rate, weight gain and specific growth rate (p≤0.05) were observed for PL fed diet with 35% CP. The same trend was observed for PL fed with feeding time 9:00, 15:00 h. The PL fed diet containing 35% protein showed the highest (p≤0.05) protein efficiency ratio, protein productive value, fat retention, energy retention and the better feed conversion ratio. Meanwhile, the PL fed at feeding time 9:00, 18:00 h recorded the better feed conversion ratio. No significant difference was showed for the effect of dietary protein on whole body moisture and protein contents. The highest whole body contents of crude fat and gross energy were observed for prawn fed the diet with 35% CP. However, PL fed at 9:00, 15:00 h had the highest whole body protein and lower fat contents (p≤0.05). Irrespective of dietary proteins or feeding times, M. rosenbergii male recorded the better growth performance and feed utilization than female in all scenarios. The obtained findings revealed that M. rosenbergii PL fed the diet containing 35% CP at feeding time 9:00; 15:00 h is recommended to obtain optimum growth performance and feed utilization.
 
 
 
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