水生生物学报2017，Vol.41Issue(1)：139-145,7.DOI:10.7541/2017.18
再投喂鱼油对瓦氏黄颡鱼肌肉脂肪酸组成的影响
RESTORATION OF FLESH FATTY ACID COMPOSITION IN DARKBARBEL CATFISH (PELTEOBAGRUSVACHELLI) USING A FINISHING FISH OIL DIET
摘要
Abstract
This study aimed to evaluate the effects of 50%—100%soybean oil on growth performance and flesh fatty acid composition of darkbarbel catfish (Pelteobagrus vachelli), so as to assess the effects of re-feeding fish oil (FO) on flesh fatty acid composition. Four isonitrogenous, isolipidic diets, i.e., FO, soybean oil (SO), 50%FO+50%SO (S1), and 25%FO+75%SO (S2), were fed to triplicate groups of 40 juvenile P. vachelli [(1.10±0.12) g] for 80d. At the end of the 80d period, all fish were fed with FO for 30d. The results showed that growth rates, hepatosomatic index (HSI), and proximate composition in darkbarbel catfish were not affected by SO. With increasing SO levels, the percentages of oleic acid, arachidonic acid, and monoun-saturated fatty acids significantly increased (P<0.05). However, docosahexaenoic acid (DHA), eicosapentae-noic acid (EPA), highly unsaturated fatty acid (HUFA) levels and n-3/n-6 ratios significantly reduced with die-tary SO (P<0.05). After 30d on FO, flesh levels of DHA, EPA, andΣn-3 HUFA significantly increased in groups S2 and SO (P<0.05), but not to the same extent as those in the FO-containing groups except S1. The results revealed that it was possible to substitute almost 100%of FO with SO in the diets of darkbarbel cat-fish without affecting growth performance. A re-feeding period of 30d with 100%FO significantly increased flesh levels ofΣn-3 HUFA, 20:5n-3, and 22:6n-3 in fish which were fed diets containing SO in the first stage.关键词
瓦氏黄颡鱼/鱼油/豆油/n-3多不饱和脂肪酸/脂肪酸修复Key words
Pelteobagrus vachelli/Fish oil/Vegetable oil/n-3 high unsaturated fatty acids/Restoration分类
农业科技引用本文复制引用
邵婷,覃川杰,袁登越,正勇,李华涛..再投喂鱼油对瓦氏黄颡鱼肌肉脂肪酸组成的影响[J].水生生物学报,2017,41(1):139-145,7.基金项目
Supported by the National Natural Science Foundation of China (No.31402305) （No.31402305）
the Educational Commission of Sichuan Province of China (No.14ZA0249) （No.14ZA0249）
