Fatty acid metabolism in the freshwater fish Murray cod (Maccullochella peelii peelii) deduced by the whole-body fatty acid balance method

Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
G M TurchiniSena S De Silva

Abstract

The whole-body fatty acid balance method was used to investigate the fatty acid metabolism in Murray cod (Maccullochella peelii peelii) fed diets containing canola (CO) or linseed oil (LO). Murray cod were able to elongate and desaturate both 18:2n-6 and 18:3n-3. In fish fed the CO diet, 54.4% of the 18:2n-6 consumed was accumulated, 38.5% oxidized and 6.4% elongated and desaturated to higher homologs. Fish fed the LO diet accumulated 52.9%, oxidized 37% and elongated and desaturated 8.6% of the consumed 18:3n-3. The overall roles of n-6 fatty acids appeared more important in Murray cod compared to other freshwater species. Murray cod also showed a preferential order of utilization of C18 fatty acid for energy production (18:3n-3 > 18:2n-6 > 18:1n-9). Moreover, it is demonstrated that an increase in dietary 18:3n-3 is directly responsible of increased desaturase activity and augmented saturated fatty acid accumulation in the fish body. The present study also suggests that, in the context of the possible maximization of the natural ability of fish to produce long chain polyunsaturated fatty acids, the whole-body approach can be considered well suited and informative and Murray cod is a suited candidate to fish oil replacement fo...Continue Reading

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Citations

Mar 2, 2010·The British Journal of Nutrition·R PoureslamiS De Smet
Dec 18, 2008·Nutrition Research Reviews·Matthew R MillerChris G Carter
Jun 9, 2012·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Hong-tao RenYong-kai Tang
Jul 3, 2016·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Michael J SaliniBrett D Glencross
Oct 25, 2011·Journal of Agricultural and Food Chemistry·Monica SandenBente E Torstensen
Oct 4, 2020·Progress in Lipid Research·Houguo XuQinghui Ai
Dec 17, 2008·Journal of Agricultural and Food Chemistry·Giovanni M TurchiniGeoff Gooley

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