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Science International Vol. 5 (3), 2017
Research Article
Impacts of Pro-Grow® on Growth Performance, Physiological, Immune Responses and Economic Efficiency of Adult Oreochromis niloticus (Linnaeus, 1758) under Stocking Density Stress
Ahmed Ismail Mehrim , Fathy Fatoh Khalil , Mohamed Moaaz Refaey and Aram Muhamad Abdalqadir
 
Abstract: Background and Objective: Fish intensification had led to the outbreaks of stress effects and inflicting major problems in the fish farming industry. Hence, the objective of the present study was to evaluate the effects of dietary probiotic Pro-Grow® contrary to the stocking density stress (SD) on adult Oreochromis niloticus (O. niloticus ) for 15 weeks. Methods: The present study was designed to evaluate the effects of graded levels of Pro-Grow® (0, 10 and 20 g kg–1 diet) against SD (40 and 80 fish m–3) stress on water quality parameters, growth performance, physiological, immune responses, besides the economic efficiency parameters of adult O. niloticus. Data was analyzed using SAS. Results: The results revealed that increasing SD (80 fish m–3) significantly (p<0.05) decreased the water dissolved oxygen, while water NH3-N was significantly increased. Also, high SD had drastically effects on all growth and feed efficiency parameters, body composition (ash and crude protein), hematological parameters (hemoglobin, red blood cells and white blood cells) and the economic efficiency compared to O. niloticus reared at low SD (40 fish m–3). No significant (p>0.05) effects of all tested immune responses parameters of fish reared at both SDs rates. However, addition of 10 and 20 g Pro-Grow® kg–1 diet alleviated the severely effects of both SDs stress 40 and 80 fish m–3, respectively on all above tested parameters. Conclusion: Thus, it could be concluded that the Pro-Grow® probiotic was successfully using at these levels into O. niloticus intensive production systems. Regarding its predicted high fish production, improving physiological responses, besides the high economic efficiency or the environmental friendly effects.
 
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