期刊
AQUACULTURE NUTRITION
卷 27, 期 6, 页码 2267-2278出版社
WILEY-HINDAWI
DOI: 10.1111/anu.13361
关键词
digestive enzymes; ghrelin gene; growth rate; Oreochromis niloticus; rice protein concentrate
类别
资金
- Academy of Scientific Research and Technology (ASRT)
- National Research Council of Italy (CNR)
The study showed that replacing FM with RPC in Nile tilapia diets can enhance growth performance, digestive and absorptive capability, and health status. The group with 25% replacement of FM by RPC exhibited the best results in terms of growth parameters, growth hormone level, and digestive enzyme activities.
Fish meal (FM) is a significant source of protein, but the high cost has limited its use in feeds. Hence, alternative, economic and available FM substitutes should be found. In this study, the consequences of replacing FM with rice protein concentrate (RPC) on the growth parameters, proximate body composition, digestive and absorptive capabilities, biochemical parameters and the expression of appetite-related gene (ghrelin) in Nile tilapia, Oreochromis niloticus, were investigated. Fish (27.8 +/- 0.1 g) were randomly organized into four groups and fed on experimental diets having four replacement percentages of FM with RPC: 0%, 25%, 50% and 75% (RPC0, RPC25, RPC50 and RPC75) for 5 months. The results cleared that RPC25 group exhibited linearly and quadratically the highest values for growth parameters, growth hormone level, and activities of protease, amylase as well as proximal intestinal villus length, width, the goblet cells count and ghrelin gene expression among all groups. From overall results, RPC could be used as an economically and beneficial ingredient to replace up to 25% of dietary FM in Nile tilapia diet with enhancing the growth performance, digestive and absorptive capability, and health status, but with the supplementation of synthetic amino acids.
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