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Basal metabolic rate, food intake, and body mass in cold- and warm-acclimated Garden Warblers

Klaassen, M.R.J. and Oltrogge, M. and Trost, L. (2004) Basal metabolic rate, food intake, and body mass in cold- and warm-acclimated Garden Warblers. Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology, 137, 639-647. ISSN 1095-6433.

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Official URL: http://dx.doi.org/10.1016/j.cbpb.2003.12.004

Abstract

We address the question of whether physiological flexibility in relation to climate is a general feature of the metabolic properties of birds. We tested this hypothesis in hand-raised Garden Warblers (Sylvia borin), long-distance migrants, which normally do not experience great temperature differences between summer and winter. We maintained two groups of birds under cold and warm conditions for 5 months, during which their body mass and food intake were monitored. When relatedness (siblings vs. non-siblings) of the experimental birds was taken into account, body mass in cold-acclimated birds was higher than in warm-acclimated birds. BMR, measured at the end of the 5-month temperature treatment, was also higher in the cold- than the warm-acclimated group. Migrant birds thus seem to be capable of the same metabolic cold-acclimation response as has been reported in resident birds. The data support the hypothesis that physiological flexibility is a basic trait of the metabolic properties of birds [KEYWORDS: Basal metabolic rate ; Body mass ; Food intake ; Garden Warbler ; Physiological flexibility ; Temperature acclimation]

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:11543
Deposited On:23 Nov 2011 01:00
Last Modified:31 Mar 2014 10:25

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