水产学报2013，Vol.37Issue(5)：751-760,10.DOI:10.3724/SP.J.1231.2013.38430
饲料中菜籽油替代鱼油对大黄鱼生长、肌肉脂肪酸组成和体色的影响
Effects of dietary fish oil replaced with rapeseed oil on the growth, fatty acid composition and skin color of large yellow croaker(Larimichthys crocea)
摘要
Abstract
An 8-week feeding trial was conducted to investigate the effects of dietary fish oil replaced with rapeseed oil on growth,muscle fatty acid compositions and skin color of large yellow croaker(initial weight 13.56 ±0.05 g).Five isoproteic and isolipidic experimental diets were formulated with 0％,25％,50％,75％ and 100％ replacement of fish oil by rapeseed oil.Results showed that these replacements did not significantly influence the survival rate (SR) and specific growth rate (SGR) (P ＞ 0.05).However,the feed conversion ratio(FCR) was increased with the increasing of replacement levels.Furthermore,FCR in the group of 100％ rapeseed oil was significantly higher than that of 100％ dietary fish oil (P ＜ 0.05).No significant difference was observed in the whole body compositions (P ＞ 0.05).The concentrations of C18∶0,C18∶1,C18∶2n-6,C18∶3n-3 and the saturated fatty acid(SFA),except C20∶4n-6 and C22∶5n-3 in muscle,were elevated with the increasing of dietary rapeseed oil levels.There were no significant differences in yellowness(b*)of dorsal and ventral skin among the five treatments (P ＞ 0.05).Lightness (L*)of the dorsal skin in the treatment with 100％ dietary rapeseed oil was significantly higher than that with 100％ dietary fish oil (P ＜ 0.05).However,L* of the ventral skin was not significantly different among the all treatments (P ＞ 0.05).Higher redness (a*) of ventral skin and lower a * of dorsal skin were found in fish fed with 0％ rapeseed oil.This study suggested that there were no significant effects of replacement of dietary fish oil by rapeseed oil on growth and body composition.However,the fatty acid composition of muscle and the skin color were significantly influenced.关键词
大黄鱼/菜籽油/鱼油/脂肪酸/体色Key words
Larimichthys crocea/ rapeseed oil/ fish oil/ fatty acid/ skin color分类
农业科技引用本文复制引用
易新文,张文兵,麦康森,申屠基康..饲料中菜籽油替代鱼油对大黄鱼生长、肌肉脂肪酸组成和体色的影响[J].水产学报,2013,37(5):751-760,10.基金项目
公益性行业(农业)科研专项(200903029) （农业）
