Advances in Animal and Veterinary Sciences

Research Article
Adv. Anim. Vet. Sci. 9(2): 246-252
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Asmaa T.Y. Kishawy*, Ahmed F. K. Assi, Mohamed E. Badawi, EL-Sayed I. Hassanein

Department of Nutrition and Clinical Nutrition, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, El-Sharkia, Egypt.

Abstract | The present work was designed to study the effect of partial or complete replacement of fish meal by rice protein concentrate (RPC) in the diets of Oreochromis niloticus (O. niloticus) and its effect on growth performance traits, some blood biochemical parameters, nutrients digestibility, and economic efficiency. A total of 320 O. niloticus with an average body weight of 40.50±0.270 gm were used. The fish were randomly divided into 4 equal replicate groups (Each replicate contained 20 fish). A basal control diet was formulated with zero replacement of fish meal (G1) and other experimental groups (G2-4) received a basal diet containing fishmeal replaced with 25%, 50%, and 100% RPC, respectively. The fish were fed isonitrogenous, isocaloric diets 4 times daily at a rate of 5% of body weight for 12 weeks. Body-weight gains were not affected by replacing fish meal by RPC 100% compared to control, while at this level of replacement, feed intakes, and feed conversion ratios were higher than in the control group. Protein efficiency ratios and protein retention efficiencies were decreased by replacement fish meal with RPC at 25%, 50%, and 100% than the control group. Protein and lipid profile parameters in fish serum were not significantly different between all experimental groups except triacylglycerol and very-low-density lipoproteins were lowered in RPC 100% than the other groups. Dry matter digestibility wasn’t different between experimental groups except in RPC 100% it was decreased, while crude protein digestibility was lowered with all percent of fish meal replacement with RPC and EE digestibility was lowered in 50 and 100% RPC groups compared to control. It could be concluded that RPC could replace up to 100% of FM in O. niloticus diets without any adverse effects on growth parameters as well as high economic efficiencies and high net return.

Keywords | O. niloticus, Rice protein concentrate, Growth, Digestibility, Economics.