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The effect of replacing dietary fish oil with canola oil on fatty acid composition and expression of desaturase and elongase genes in Jade Tiger hybrid abalone

Mateos, Hintsa, Lewandowski, Paul and Su, Xiao (2012) The effect of replacing dietary fish oil with canola oil on fatty acid composition and expression of desaturase and elongase genes in Jade Tiger hybrid abalone. Food Chemistry, 131 (4). pp. 1217-1222. ISSN 0308-8146

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Abstract

This study investigates the effect of graded substitution of dietary fish oil (FO) with canola oil (CO) on fatty acid composition and expression of Δ-6 desaturase and elongase 2 genes in the muscle of Jade Tiger hybrid abalone. The control diet contained 1.5% FO supplement (0% CO). Four other diets contained FO/CO in ratios of 3:1 (CO 25%), 1:1 (CO 50%), 1:3 (CO 75%) and 100% CO. The result demonstrated that abalone fed the diets supplemented with 25% and 50% CO showed similarly high levels of total omega-3 polyunsaturated fatty acid (n-3 PUFA), eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n-3) (P < 0.05) as the 0% CO group. The highest levels of total PUFA and total monounsaturated fatty acids were found in the 100% CO group (P < 0.05). The results also showed that Δ-6 desaturase and elongase 2 gene expression was increased in a graded manner by increasing dietary CO (P < 0.05). It was concluded that replacement of FO by CO at the levels of 25–50% can improve the contents of health-benefiting EPA and DHA in abalone.

Item Type: Article
Uncontrolled Keywords: ResPubID22746, ResPubID23302, ResPubID25501, abalone, muscle, fish oil, canola oil, n-3 fatty acids, gas–liquid chromatography, desaturase, elongase
Subjects: Faculty/School/Research Centre/Department > School of Biomedical and Health Sciences
FOR Classification > 0908 Food Sciences
SEO Classification > 8301 Fisheries - Aquaculture
Depositing User: VUIR
Date Deposited: 04 Jul 2012 03:43
Last Modified: 26 Mar 2014 01:49
URI: http://vuir.vu.edu.au/id/eprint/7855
DOI: https://doi.org/10.1016/j.foodchem.2011.09.107
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Citations in Scopus: 19 - View on Scopus

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