饲料脂肪源对光唇鱼亲鱼生长及繁殖性能的影响

Effects of Distinct Lipid Sources on Growth and Reproductive Performance of Parent Acrossocheilus fasciatus

为研究饲料脂肪源对光唇鱼亲鱼生长和繁殖性能的影响,挑选平均初始体重(38.38±0.28)g的光唇鱼450尾,随机分成5组,每组3个重复,分别投喂在基础饲料中添加鱼油、豆油、花生油、玉米油和菜籽油的5种脂肪源饲料,试验8周。结果表明:投喂不同脂肪源饲料组间增重率、特定生长率及饲料系数无显著差异(P>0.05);光唇鱼成熟卵中除玉米油、菜籽油组均检测出21种脂肪酸,投喂玉米油组成熟卵中5种n-6系不饱和脂肪酸含量最高,其中C20∶2n-6和C20∶3n-6与菜籽油组差异显著(P<0.05);不同脂肪源饲料组间获卵量和受精率无显著差异(P>0.05),在孵化率及仔鱼平游率上玉米油组最高,显著高于菜籽油组(P<0.05)。表明豆油、花生油、玉米油和菜籽油能够部分替代鱼油满足光唇鱼生长和繁殖过程对脂肪酸的需要,其中以玉米油最佳。

In order to explore the effect of feed lipid source on the growth and reproductive performance of the parent fish,450 individuals with the average initial weight of(38.38±0.28)g were selected and ran⁃domly divided into five groups,each group with three replicates,and fed with five kinds of lipid source feeds added with fish oil,soybean oil,peanut oil,corn oil and rapeseed oil respectively in the basic feed for 8 weeks.The results showed that there was no significant difference in weight gain rate,specific growth rate and feed coefficient between groups fed with different lipid sources(P>0.05);21 kinds of fatty acids were detected in the mature eggs of the fish except corn oil group and rapeseed oil group.The content of five n-6 unsaturated fatty acids in the mature eggs fed with corn oil showed the highest level,among which C20∶2n-6 and C20∶3n-6 were significantly different from the rapeseed oil group(P<0.05);there was no significant difference in egg yield and fertilization rate between different lipid source feed groups(P>0.05),but the corn oil group was the highest in hatching rate and larval normal swimming rate,which was significantly higher than the rapeseed oil group(P<0.05).The results indicated that soybean oil,peanut oil,corn oil and rapeseed oil could partially replace fish oil to meet the needs of fatty acids in the growth and reproduction process of the fish,and corn oil was the most suitable lipid source.