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Influence of dietary blends of menhaden oil and canola oil on growth, muscle lipid composition, and thyroidal status of Atlantic salmon (Salmo salar) in sea water

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Fish Physiology and Biochemistry : Volume 19, Issue 1, July 1998

Fish Physiology and Biochemistry : Volume 18

Fish Physiology and Biochemistry : Volume 17

Fish Physiology and Biochemistry : Volume 16

Dietary fatty acid composition influences swimming performance in Atlantic salmon (Salmo salar) in seawater

Content Provider	Springer Nature Link
Author	McKenzie, D.J. Higgs, D.A. Dosanjh, B.S. Deacon, G. Randall, D.J.
Copyright Year	1998
Abstract	Swimming performance was measured in Atlantic salmon (Salmo salar, L.) fed one of four isonitrogenous and isoenergetic experimental diets, in which the supplemental lipid (25% of diet) originated either solely from menhaden oil (rich in highly unsaturated fatty acids of the n-3 series; n-3 HUFA), or from different proportions of this oil and canola oil (rich in 18-carbon unsaturated fatty acids).The results indicate that dietary fatty acid composition influenced swimming performance in Atlantic salmon through changes in maximum swimming speed (Ucrit). Salmon fed a diet in which menhaden oil furnished all of the supplemental lipid had a significantly lower Ucrit than those fed a diet in which the supplemental lipid was an equal blend of menhaden and canola oil. Furthermore, there was a highly significant linear relationship between dietary and/or muscle levels of particular fatty acids or groups of fatty acids and Ucrit.There was a negative relationship between dietary n-3 HUFA content and Ucrit, but there was no relationship between Ucrit and muscle n-3 HUFA content nor between Ucrit and the levels of the eicosanoids thromboxane A2 and prostacyclin, or of their ratio, in the heart and gills of fatigued salmon. These results indicate that the differences in exercise performance were not a result of differences in n-3 HUFA metabolism amongst the dietary groups.Indeed, although there was a highly significant positive relationship between Ucrit and total n-6/n-3 fatty acid ratio of muscle lipids, this was largely due to the associated positive relationship between Ucrit and content of the most common n-6 fatty acid in muscle lipids, linoleic acid. There was also a significant positive relationship between content in muscle lipids of the most prominent fatty acid in canola oil, oleic acid, and Ucrit. It is suggested that metabolism of these 18-carbon unsaturated fatty acids accounts for the effects of the diets on exercise performance.
Starting Page	111
Ending Page	122
Page Count	12
File Format	PDF
ISSN	09201742
Journal	Fish Physiology and Biochemistry
Volume Number	19
Issue Number	2
e-ISSN	15735168
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1998-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Animal Biochemistry Hydrobiology Zoology Animal Anatomy / Morphology / Histology Animal Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Biochemistry Aquatic Science

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