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Flying, fasting, and feeding in birds during migration: a nutritional and physiological ecology perspective

McWilliams, S.R. and Guglielmo, C. and Pierce, B. and Klaassen, M.R.J. (2004) Flying, fasting, and feeding in birds during migration: a nutritional and physiological ecology perspective. Journal of Avian Biology, 35, 377-393. ISSN 0908-8857.

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Official URL: http://dx.doi.org/10.1111/j.0908-8857.2004.03378.x

Abstract

Unlike exercising mammals, migratory birds fuel very high intensity exercise (e.g., flight) with fatty acids delivered from the adipose tissue to the working muscles by the circulatory system. Given the primary importance of fatty acids for fueling intense exercise, we discuss the likely limiting steps in lipid transport and oxidation for exercising birds and the ecological factors that affect the quality and quantity of fat stored in wild birds. Most stored lipids in migratory birds are comprised of three fatty acids (16:0, 18:1 and 18:2) even though migratory birds have diverse food habits. Diet selection and selective metabolism of lipids play important roles in determining the fatty acid composition of birds which, in turn, affects energetic performance during intense exercise. As such, migratory birds offer an intriguing model for studying the implications of lipid metabolism and obesity on exercise performance. We conclude with a discussion of the energetic costs of migratory flight and stopover in birds, and its implications for bird migration strategies.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:11555
Deposited On:23 Nov 2011 01:00
Last Modified:31 Mar 2014 10:21

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