Response of tissue lipids to diet variation in Atlantic salmon (Salmo salar): Implications for estimating diets with fatty acid analysis

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DOIResolve DOI: http://doi.org/10.1016/j.jembe.2011.09.002
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TypeArticle
Journal titleJournal of Experimental Marine Biology and Ecology
Volume409
Issue1-2
Pages267274; # of pages: 8
SubjectBelly flap; Diet estimate; Lipid; Muscle; Temporal variation
AbstractThe influence of feeding duration and tissue type on fatty acid (FA) deposition in Atlantic salmon (Salmo salar) tissues was investigated to establish the appropriate foundation for quantitative estimates of diet in wild fish. Fish were adapted to seawater and were fed one of four formulated diets based on krill or herring oil for 22 weeks. After 12 weeks of feeding, proportions of most FA in both belly flap and muscle tissues of salmon had changed substantially to resemble dietary FA proportions, showing little variation after an additional 10 weeks of feeding. However, tissues showed a differential response to diets, depending on the proportions of dietary FA. When present in large proportions in the diet, FA, including 18:2n-6 and monounsaturated FA, seemed to be selectively catabolized; when present in low proportions, selective retention in tissues occurred. Proportions of the polyunsaturated FA, 20:5n-3 and 22:6n-3, in tissues also varied with diet but not in a predictable manner related to dietary FA proportions. Further, the response to a change in the FA profile of diet was not equal for both tissues with belly flap tissue developing a FA signature that was more similar to the diet than muscle tissue. These results suggest that fish may represent a more complex study species than marine mammals for quantitative estimation of diet using FA.
Publication date
LanguageEnglish
AffiliationNRC Institute for Marine Biosciences; National Research Council Canada
Peer reviewedYes
NPARC number19649682
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Record identifierb01f0d22-5a0f-4582-be68-d7d0a5ff8505
Record created2012-04-02
Record modified2016-05-09
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