摘要
在4组等氮等能的军曹鱼(Rachycentron canadum)实用饲料中分别添加不同梯度水平的胆汁酸(0,0.015%,0.030%和0.045%),连续投喂初始体质量为(5.4±0.12)g的军曹鱼8周后,通过测定军曹鱼增重率(WGR,%)、特定生长率(SGR,%)和饲料系数(FCR),并进行肝脏成分分析和血清分析,比较各组军曹鱼生长和体组成的影响。结果表明,添加水平为0.03%组的增重率高于对照组和0.015%添加组,饲料系数低于上述2组;军曹鱼血清胆固醇和肝脏脂肪的质量分数均与饲料中胆汁酸质量分数呈负相关;4组的成活率、特定生长率、全鱼和肌肉灰分、水分质量分数没有显著性差异。由此可见,饲料中添加胆汁酸能够促进军曹鱼的生长,并能降低脂肪在军曹鱼体内中的沉积。
To study the effect of bile acids on the growth performance and body compositon of cobia （Rachycentron canadum）,we added four levels of bile acids （0,0.015%,0.03% and 0.045%） to four iso-energetic and iso-nitrogenous practical diets.The cobia with an initial wet weight of （5.4±0.12） g was fed for 8 weeks,and its weight gain rate （WGR,%）,special growth rate （SGR,%）,feed conversion rate （FCR） and liver and serum were analyzed.The results show that the WGR of 0.03% group is significantly higher than that of the control group and 0.015% group （P〈0.05）,and the FCR is significantly lower than those two groups.The cholesterol in serum and the fat content of liver show a negative correlation with the bile acids amount in diets.There is no significant difference among the survival rate,SGR,ash and moisture in the whole fish body and meal.The results indicate that adding bile acid to diet can promote the growth of cobia and reduce the accumulation of body lipid.
出处
《南方水产》
2010年第4期20-25,共6页
South China Fisheries Science
基金
国家科技支撑计划区域项目(2007BAD29B04)
关键词
军曹鱼
胆汁酸
生长
脂肪
cobia（Rachycentron canadum）
bile acids
growth
lipid
