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The 'n-3 LC-PUFA sparing effect' of modified dietary n-3 LC-PUFA content and DHA to EPA ratio in Atlantic salmon smolt

Citation

Codabaccus, MB and Carter, CG and Bridle, AR and Nichols, PD, The 'n-3 LC-PUFA sparing effect' of modified dietary n-3 LC-PUFA content and DHA to EPA ratio in Atlantic salmon smolt, Aquaculture, 356-357 pp. 135-140. ISSN 0044-8486 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 Elsevier B.V.

DOI: doi:10.1016/j.aquaculture.2012.05.024

Abstract

n−3 Long-chain (≥C20) polyunsaturated fatty acids (LC-PUFA) are used extensively by fish via β-oxidation when in dietary surplus. Therefore it is of interest to optimize n−3 LC-PUFA deposition in fish via a reduction in β-oxidation which may be induced by manipulation of dietary fatty acids. This study tested whether Atlantic salmon smolt fed a dietwith a higher docosahexaenoic acid (DHA):eicosapentaenoic acid (EPA) ratio and a lower content of n−3 LC-PUFA to that of fish oil (FO) based diets would enhance deposition of n−3 LC-PUFA in fish tissues. Comparisons were made between fish fed: a FO diet, a blend of 50% rapeseed and 50% tuna oil diet (model oil, MO 1), a blend of 50% rapeseed, 25% tuna and 25% FO diet (MO 2), and a blend of 50% FO and 50% chicken fat diet (FO/CF). The dietary DHA:EPA ratio was in the order MO 1>MO 2>FO/CF~FO. Dietary n−3 LC-PUFA content was approximately 2-fold lower in fish fed the MO 1, MO 2 and FO/CF diets compared to the FO diet. There were comparable amounts of n−3 LC-PUFA in the muscle of FO,MO1 and FO/CF fed fish. Our findings indicate that the right balance in both absolute and relative amounts of EPA and DHA can promote n−3 LC-PUFA retention.

Item Details

Item Type:Refereed Article
Keywords:eicosapentaenoic acid, docosahexaenoic acid, fish oil, chicken fat, tuna oil, genetically modified plants
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Aquaculture Fin Fish (excl. Tuna)
Author:Codabaccus, MB (Dr Basseer Codabaccus)
Author:Carter, CG (Professor Chris Carter)
Author:Bridle, AR (Dr Andrew Bridle)
ID Code:81131
Year Published:2012
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2012-11-23
Last Modified:2017-05-02
Downloads:0

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