The effects of fish oil-enriched diets on growth, feed conversion and fatty acid content of red hybrid tilapia, Oreochromis sp.

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• 作者：Ahmed Al-Souti^a ; ^{souti@squ.edu.om} ; Jamal Al-Sabahi^b ; ^{jamal@squ.edu.om} ; Bassam Soussi^c ; ^d ; ^soussi@gu.se ; Stephen Goddard^a ; ^{sgoddard@squ.edu.om}
• 关键词：Fish feeds ; Cod liver oil ; n-3 Fatty acids ; Red hybrid tilapia
• 刊名：Food Chemistry
• 出版年：2012
• 期刊代码：48_03088146
• 类别：abs
• 出版时间：1 August, 2012
• 卷：133
• 期：3
• 页码：723-727
• 文件大小：176 K

摘要

Juvenile, red hybrid tilapia were fed diets containing cod liver oil (0%, 4%, 8%, 12%of total diet) substituted against corn oil. After 10 weeks, no significant differences between treatments were seen in weight gain, specific growth rate, feed conversion ratio, whole body or dorsal muscle (fillet) proximate composition. Gas chromatography revealed significant differences in the total n-3 content and fatty acid profiles of dorsal muscle. The total n-3 content of dorsal muscle increased from 7.6%to 18.6%, total n-6 content fell from 37.5%to 12.9%and docosahexanaenoic acid increased from 5.8-16.1%of total fatty acids, in fish fed 0%and 12%fish oil, respectively. The retention of eicosapentaenoic acid was low in all dietary groups, possibly indicating selective use as a substrate for 尾-oxidation. The results demonstrate the potential to enhance the total n-3 fatty acids and docosahexaenoic acid in tilapia fillets by increasing dietary fish oil.