Effects of Dietary Glycerol Monolaurate on Growth, Antioxidant Capacity and Lipid Metabolism in Cage-Farmed Pompano (Trachinotus ovatus) Juveniles

作者：Huaxing Lin, Beiping Tan, Qihui Yang, Shuyan Chi, Hongjie Wei, Yuancai Wu, Gyan Watson Ray, Mpwaga Alatwinusa Yohana · 发表于：Frontiers in Marine Science · 年份：2022 · DOI：10.3389/fmars.2022.914134 · 被引用次数：15 · 研究领域：Aquaculture Nutrition and Growth、Aquaculture disease management and microbiota、Reproductive biology and impacts on aquatic species

Glycerol monolaurate (GML), a representative fatty acid glyceride, was used to promote growth. This study investigated the effects of GML in diets on growth, serum biochemical parameters, antioxidant capacity, liver morphology and lipid metabolism for juvenile pompano Trachinotus ovatus . Six groups of T. ovatus (mean weight = 14.00 ± 0.70 g) were fed with six diets, containing varying GML levels of 0.00% (G0), 0.05% (G5), 0.10% (G10), 0.15% (G15), 0.20% (G20), and 0.25% (G25) for 8 weeks. Fish were reared for in floating cages (length: 1 m; width: 1 m; and height: 2 m). The highest weight gain rate (WGR), specific growth rate (SGR), and protein deposit rate (PDR) were observed in the G15 group ( P < 0.05). Hepatic glutathione peroxidase, total antioxidant capacity and superoxide dismutase activities were significantly increased in the G10 and G15 groups compared with the G0 group ( P < 0.05), whereas hepatic malondialdehyde (MDA) was significantly reduced in the G10 and G15 groups ( P < 0.05). The alkaline phosphatase activity was significantly higher in the G5, G10, G15, and G20 groups than in the G0 group ( P < 0.05), and the highest AKP activity was observed in the G15 group. Alanine aminotransferase (ALT) activity was significantly lower in the G10, G15, G20, and G25 groups than in the G0 group ( P < 0.05). The addition of GML to the feed significantly reduced triglyceride (TG) content ( P < 0.05). In comparison with the G0 group...