不同胆汁酸对花鲈生长、血清生化及肝脏脂代谢的影响

Effects of Different Bile Acids on Growth Performance,Serum Biochemical and Lipid Metabolical Indexes of Spotted Seabass(Lateolabrax maculatus)

为研究不同胆汁酸对花鲈生长性能、血清生化及脂肪代谢的影响,选取240尾体格健壮、规格一致的花鲈((16.00±0.50)g),随机分到12个养殖桶中,分别饲喂基础饲料(不添加胆汁酸)、添加载体胆汁酸的饲料、添加脂壮素NE的饲料和添加液体胆能L的饲料,投喂8周后,采集样品并分析。结果表明:1)与基础饲料组相比,脂壮素NE组显著提高了花鲈的增重率、摄食量和血清溶菌酶活性(P<0.05);液体胆能L组显著降低增重率和摄食量(P<0.05),对血清非特异性免疫无显著影响(P>0.05);而载体胆汁酸组对花鲈增重率和血清非特异性免疫均无显著影响(P>0.05)。2)3种不同剂型胆汁酸的添加均可显著降低血清谷草转氨酶、肝脏乙酰辅酶A羧化酶的活性(P<0.05),且脂壮素NE组的肝脏脂蛋白脂酶活性增加显著(P<0.05)。综上所述,饲料中添加脂壮素NE后会显著提高花鲈的增重率和血清中溶菌酶、肝脏中脂蛋白脂酶的活性。

This study investigates effects of different bile acids on growth performance,serum biochemical and lipid metabolism indexes of spotted seabass(Lateolabrax maculatus).A total of 240 fish((16.00±0.50)g)were randomly divided into 12 tanks.The fish were fed with basal diet,diets supplemented with carrier bile acid,bile acid NE and liquid bile acid L,respectively.After 8 weeks of feeding,samples were collected and analyzed.The results showed that,compared with the control group,bile acid NE group significantly increased the weight gain rate(WGR),food intake(FI)and the serum lysozyme activities(P<0.05);liquid bile L group significantly reduced the WGR and FI(P<0.05),and no significant effect on serum immunity was observed(P>0.05);however,carrier bile acid had no significant effect on WGR and serum immunity(P>0.05).Compared with control group,other 3 bile acid supplementation groups significantly decreased the activities of serum glutamic oxaloacetic transaminase,liver acetyl-CoA carboxylase(P<0.05).Moreover,bile acid NE group significantly increased hepatic lipoprotein lipase activities(P<0.05),and improved the liver tissue structure.In conclusion,bile acid NE could improve fat catabolism,reduce fat deposition to maintain liver health.Based on the comprehensive analysis of growth performance,serum biochemical and lipid metabolism indexes of spotted seabass,the bile acid NE might be suitable form for the supplement of bile acid.