Diet preferences for specific fatty acids and their effect on composition of fat reserves in migratory Red-eyed Vireos (Vireo olivaceous)

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
Barbara J PierceMichael A Huguenin

Abstract

Fatty acid composition of body fat in birds often differs between bird species and between seasons, and changes in diet may be responsible for this variation. We tested two related hypotheses using Red-eyed Vireos, a long-distance migratory songbird: (1) birds prefer diets with certain fatty acids, and (2) fatty acid composition of the diet primarily determines the composition of lipid reserves. During paired-choice experiments, vireos preferred semi-synthetic diets with triolein (81% digestive extraction efficiency) over diets with tristearin (54% digestive extraction efficiency) and, in general, ate more when offered diets with unsaturated fats compared to saturated fats. These results demonstrate that vireos can discriminate between diets differing only in fatty acid composition and prefer diets with long-chain unsaturated fatty acids. When vireos were fed one of two diets for 1 month, the primary fatty acids in each diet also predominated in the tissues of birds fed each diet. However, some fatty acids that were absent in the diet occurred in bird tissues (e.g., 22:4, 22:5) suggesting that selective metabolism of fatty acids along with diet composition determine the fatty acid composition of lipid reserves in migratory birds.

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Citations

Dec 15, 2010·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Edwin R PriceChristopher G Guglielmo
Feb 18, 2011·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Miriam Ben-HamoBerry Pinshow
Jul 7, 2014·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Juan Manuel RíosPablo Sabat
Jul 11, 2014·Integrative and Comparative Biology·Barbara J Pierce, Scott R McWilliams
Jun 18, 2014·Integrative and Comparative Biology·Robin W Warne
Jun 22, 2010·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Edwin R Price
Jan 12, 2010·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Marshall D McCue
Jun 16, 2009·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Marshall D McCueBerry Pinshow
Jan 14, 2017·The Journal of Experimental Biology·Ivan ViegasJosé A Alves
Oct 21, 2006·Current Opinion in Clinical Nutrition and Metabolic Care·Nigel TurnerPaul L Else
Jul 10, 2009·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Edwin R Price, Christopher G Guglielmo
Sep 24, 2020·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Kristen J DeMoranvilleScott R McWilliams
Mar 23, 2005·The Journal of Experimental Biology·Barbara J PierceChristopher G Guglielmo
Jul 1, 2006·The Journal of Experimental Biology·Dominique Maillet, Jean-Michel Weber

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