Translator Disclaimer
1 April 2003 INFLUENCE OF DIET ON FATTY-ACID COMPOSITION OF DEPOT FAT IN WESTERN SANDPIPERS (CALIDRIS MAURI)
Author Affiliations +
Abstract

Western Sandpipers (Calidris mauri) have been previously shown to undergo seasonal changes in the fatty acid composition of their fat stores, even though they do not show the marked seasonal variation in diet common to many migratory passerines. We investigated the effect of dietary fatty acid composition on the fatty acid composition of adipose tissue in captive Western Sandpipers by feeding birds experimental diets with different fatty acid composition. In addition, we determined the effect of total percentage of fat content of the diet (5 vs. 10%) on fatty acid composition of depot fat. Birds maintained normal body mass (24–27 g) throughout all experimental treatments. Most adipose fatty acids were sensitive to dietary manipulation to some extent. Changes in fatty acid composition of the diet had the largest effect on adipose tissue composition for the essential polyunsaturated fatty acid linoleate (18:2), whereas it had the least effect for the monounsaturated fatty acid oleate (18:1). The saturated fatty acid palmitate (16:0) demonstrated an intermediate capacity to alter fatty acid composition of adipose tissue. Total amount of fat in the diet did not influence the effect of diet on fatty acid deposition. Results of dietary manipulations in this study suggest that diet does explain some of the variation in fatty acid composition observed during migration in Western Sandpipers, but that certain fatty acids can be modulated independently of diet (probably through de novo synthesis, postabsorption modification, or both).

Oliver Egeler, Dana Seaman, and Tony D. Williams "INFLUENCE OF DIET ON FATTY-ACID COMPOSITION OF DEPOT FAT IN WESTERN SANDPIPERS (CALIDRIS MAURI)," The Auk 120(2), 337-345, (1 April 2003). https://doi.org/10.1642/0004-8038(2003)120[0337:IODOFC]2.0.CO;2
Received: 2 February 2002; Accepted: 17 November 2002; Published: 1 April 2003
JOURNAL ARTICLE
9 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top