Journal
FOOD CHEMISTRY
Volume 133, Issue 3, Pages 723-727Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2012.01.080
Keywords
Fish feeds; Cod liver oil; n-3 Fatty acids; Red hybrid tilapia
Funding
- HM Sultan Qaboos Fund for Strategic Research
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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 beta-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. (C) 2012 Elsevier Ltd, All rights reserved.
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