Effects of Dietary Lysolecithin on Growth, Digestion, Immunity and Lipid Metabolism in Large Barramundi Lateolabrax maculatus
WANG Ligang1,2, WANG Chengqiang2, XIANG Zhiwei2, WANG Xiaoyan2, HAO Tiantian2, SUN Yongzhi2, HUANG Bingshan2, WANG Zhongquan2, LI Baoshan2, LIU Xiaobo2, HU Miaofeng3
1. National Demonstration Center for Experimental Fisheries Science Education, Centre for Research on Environmental Ecology and Fish Nutrition, Ministry of Agriculture and Rural Affairs, Shanghai Collaborative Innovation for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai 201306, China; 2. Shandong Marine Fishery Feed Engineering Technology Research Center, Aquatic Animal Nutrition and Feed R&D Innovation Demonstration Platform, Shandong Key Laboratory of Marine Ecological Restoration, Yantai Key Laboratory of Quality and Safety Control and Deep Processing of Marine Food, Shandong Marine Resource and Environment Research Institute, Yantai 264006, China; 3. Aller Aqua(Qingdao)Co., Ltd, Qingdao 266000, China
Abstract：In order to investigate the effects of dietary lysolecithin on growth, digestive enzyme activities, non-specific immunity, and lipid metabolism in barramundi Lateolabrax maculatus, large barramundi with initial body weight of (302.22±3.50) g were stocked into marine floating cages and fed an isonitrogenous and isolipidic basal diet with fish meal, chicken meal, and soybean concentrate as the main protein sources, and fish oil and soybean oil as the main fat sources, containing approximately 49.10% crude protein and 9.56% crude lipid. The basal diet was supplemented with 0% (control), 0.1%, and 0.2% lysolecithin for 10 weeks at water temperature of 27.0—31.5 ℃ and salinity of 25—27. Results showed that survival rate, weight gain rate, specific growth rate, and condition factor were not significantly affected by dietary lysolecithin (P＞0.05), with significantly lower viscerosomatic index and hepatosomatic index in the lysolecithin groups than those in the control group (P＜0.05). Crude lipid contents of whole body and muscle were significantly lower in the lysolecithin groups (P＜0.05), with significantly lower hepatic crude lipid content in the 0.2% group (P＜0.05). There was a significant decrease in intestinal trypsin activity in the 0.1% group (P＜0.05), and significant higher lipase activity in the lysolecithin groups (P＜0.05). Significantly higher activities of superoxide dismutase, lactate dehydrogenase, lysozyme, and alkaline phosphatase were observed in 0.1% group (P＜0.05), with significantly lower activities of both alanine aminotransferase and alanine transaminase than those in the control group (P＜0.05). There was significantly lower serum triglyceride concentration and higher cholesterol concentration in the 0.1% group (P＜0.05). Significantly higher serum high-density lipoprotein cholesterol concentration was found in the lysolecithin groups (P＜0.05). Under the conditions of this experiment, dietary lysolecithin improved digestive function and non-specific immunity in large barramundi, and 0.1% lysolecithin was recommended for large-size barramundi.
王立港, 王成强, 相智巍, 王晓艳, 郝甜甜, 孙永智, 黄炳山, 王忠全, 李宝山, 刘晓波, 胡苗峰. 溶血卵磷脂对大规格花鲈生长、消化、免疫及脂质代谢的影响[J]. 水产科学, 2026, 45(5): 793-801.
WANG Ligang, WANG Chengqiang, XIANG Zhiwei, WANG Xiaoyan, HAO Tiantian, SUN Yongzhi, HUANG Bingshan, WANG Zhongquan, LI Baoshan, LIU Xiaobo, HU Miaofeng. Effects of Dietary Lysolecithin on Growth, Digestion, Immunity and Lipid Metabolism in Large Barramundi Lateolabrax maculatus. Fisheries Science, 2026, 45(5): 793-801.
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