Effects of dietary soybean lecithin on growth performances, body composition, serum biochemical parameters, digestive and metabolic abilities in largemouth bass Micropterus salmoides

作者：Wenxue Yang, Jiaojiao Wu, Rui Song, Zhe Li, Xiaowei Jia, Pengcheng Qian, Hao Zhang, Penghui Zhang, Xinyu Xue, Shenghui Li, Yuanyuan Xie, Jinyun Ye, Guancang Dong, Chenglong Wu · 发表于：Aquaculture Reports · 年份：2023 · DOI：10.1016/j.aqrep.2023.101528 · 被引用次数：19 · 研究领域：Aquaculture Nutrition and Growth、Apelin-related biomedical research、Aquaculture disease management and microbiota

We conducted an 8-week feeding trial to explore the effects of dietary soybean lecithin (SBL) on growth performance and metabolic abilities in juvenile largemouth bass Micropterus salmoides. The addition of 4 % SBL to the feed significantly increases the specific growth rate (SGR), carcass ratio (CR) and crude protein in the fish body and muscle compared with control groups (0 %) (P < 0.05). However, 4 % SBL significant declines contents of total glucose, total bile acids and blood urea nitrogen and activities of ALT and AST in the serum compared with controls (P < 0.05). And 4 % SBL markedly increased contents of serum hormones involved in metabolism and food intake including adiponectin, agouti-related peptide, apelin and insulin (P < 0.05), while decreased cholecystokinin contents compared with controls (P < 0.05). Lipase and amylase activities in the liver and intestine were both significantly increased in 4 % and 8 % SBL groups (P < 0.05). 4 % and 8 % SBL could heighten the enzyme’s activities and genes’ mRNA levels involved in glycolysis (GCK, PFK, PK, MDH) and glycogen synthase (GS) compared with controls (P < 0.05). Meanwhile, contents of AC-CoA and glycogen in the fish liver were also significantly increased in 4 % and 8 % SBL groups compared with controls (P < 0.05). However, the activities and mRNA levels of G6P and PEPCK were not influenced in the liver of tested fish fed with 4 % SBL compared with controls (P > 0.05). In addition, 4 % SBL elevated activities and ...