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Dietary Fish Oil Supplements Increase Tissue n-3 Fatty Acid Composition and Expression of Delta-6 Desaturase and Elongase-2 in Jade Tiger Hybrid Abalone

Mateos, Hintsa, Lewandowski, Paul and Su, Xiao (2011) Dietary Fish Oil Supplements Increase Tissue n-3 Fatty Acid Composition and Expression of Delta-6 Desaturase and Elongase-2 in Jade Tiger Hybrid Abalone. Lipids, 46 (8). pp. 741-751. ISSN 0024-4201 (print) 1558-9307 (online)

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Abstract

This study was conducted to investigate the effects of fish oil (FO) supplements on fatty acid composition and the expression of D6 desaturase and elongase 2 genes in Jade Tiger abalone. Five test diets were formulated to contain 0.5, 1.0, 1.5, 2.0 and 2.5% of FO respectively, and the control diet was the normal commercial abalone diet with no additional FO supplement. The muscle, gonad and digestive glands (DG) of abalone fed with all of the five test diets showed significantly high levels of total n-3 polyunsaturated fatty acid (PUFA), eicosapentaenoic acid (EPA), docosapentaenoic acid n-3 (DPAn-3), and docosahexaenoic acid (DHA) than the control group. In all three types of tissue, abalone fed diet supplemented with 1.5% FO showed the highest level of these fatty acids(P < 0.05). For DPAn-3 the higher level was also found in muscle and gonad of abalone fed diet supplemented with 2% FO (P < 0.05). Elongase 2 expression was markedly higher in the muscle of abalone fed diet supplemented with 1.5% FO (P < 0.05), followed by the diet containing 2% FO supplement. For D6 desaturase, significantly higher expression was observed in muscle of abalone fed with diet containing 0.5% FO supplement ((P < 0.05). Supplementation with FO in the normal commercial diet can significantly improve long chain n-3 PUFA level in cultured abalone, with 1.5% being the most effective supplementation level.

Item Type: Article
Uncontrolled Keywords: ResPubID22738, abalone, muscle, gonad, digestive gland, fish oil, fatty acid composition, n-3 fatty acids, gas–liquid chromatography, gene expression, 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: 02 Jul 2012 23:40
Last Modified: 23 May 2013 05:01
URI: http://vuir.vu.edu.au/id/eprint/7851
DOI: https://doi.org/10.1007/s11745-011-3565-x
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Citations in Scopus: 16 - View on Scopus

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