Replacing soybean meal with fermented rapeseed meal in diets: potential effects on growth performance, antioxidant capacity, and liver and intestinal health of juvenile tilapia (Oreochromis niloticus)
文献类型： 外文期刊
作者： Li, Yaxue 1 ; Lu, Xing 1 ; Dong, Lixue 1 ; Peng, Di 1 ; Zhang, Jianmin 1 ; Cui, Zongbin 3 ; Wen, Hua 1 ; Tian, Juan 1 ; Jiang, Ming 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan, Peoples R China
2.Yangtze Univ, Coll Anim Sci & Technol, Jingzhou, Peoples R China
3.Guangdong Acad Sci, Inst Microbiol, State Key Lab Appl Microbiol Southern China, Guangdong Prov Key Lab Microbial Culture Collect &, Guangzhou, Peoples R China
关键词： Tilapia; Fermented rapeseed meal; Soybean meal; Substitution level; Growth
期刊名称：FISH PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：2.5； 五年影响因子：2.7 ）
ISSN： 0920-1742
年卷期： 2024 年
页码：
收录情况： SCI
摘要： This study aims to evaluate the effects of substituting soybean meal with fermented rapeseed meal (FRM) on growth, antioxidant capacity, and liver and intestinal health of the genetically improved farmed tilapia (GIFT, Oreochromis niloticus). A total of 450 tilapia (7.22 +/- 0.15 g) were fed with five experimental diets, including a basal diet containing 40% soybean meal (CP0), which was subsequently replaced by 25% (CP25), 50% (CP50), 75% (CP75), and 100% (CP100) FRM in a recirculated aquiculture system for 9 weeks (30 fish per tank in triplicates). The results showed that the weight gain, specific growth rate, feed intake, feed efficiency, hepatosomatic index, and viscerosomatic index of fish in both CP75 and CP100 groups were significantly lower than those in CP0 group (P < 0.05). The fish in CP100 group had the lower content of muscle crude protein while the higher level of muscle crude lipid (P < 0.05). Activities of serum aspartate aminotransferase, alanine aminotransferase along with total triglyceride in CP100 group were significantly higher than those in CP0 group (P < 0.05). There were no significant differences in the contents of liver protease, amylase, and lipase among five groups (P > 0.05). The activities of liver total antioxidant capacity and superoxide dismutase exhibited the increased tendency with the increase of FRM replacement levels from 25 to 50% (P < 0.05), while then significantly decreased from 75 to 100% (P < 0.05). Histological morphology indicated that the fish in between CP75 and CP100 groups had poor liver and intestine health. Intestinal microbial diversity analysis showed that the relative abundance of Cetobacterium and Alcaligenaceae in both CP75 and CP100 groups were lower than that in other three groups. In conclusion, the maximum replacement level of soybean meal with FRM in the diet was determined to be 50% without compromising the growth performance, antioxidant status, and liver and intestinal health of tilapia under the current experimental conditions. The observed decrease in food intake and subsequent retarded growth performance in the CP75 and CP100 groups can be attributed directly to a reduction in feed palatability caused by FRM.
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