𝔖 Bobbio Scriptorium
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The effect of corticosterone on standard metabolic rates of small passerine birds

✍ Scribed by William A. Buttemer; Lee B. Astheimer; John C. Wingfield

Publisher
Springer-Verlag
Year
1991
Tongue
English
Weight
517 KB
Volume
161
Category
Article
ISSN
0174-1578

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✦ Synopsis

Resting metabolic rates of Gambel's white-crowned sparrows (Zonotrichia leucophrys gambelii) and pine siskins (Carduelis pinus) were evaluated at thermoneutral temperatures before and after administration of corticosterone (B) at physiological doses. There was no effect of B on basal metabolic rate of either species, but nocturnal metabolic rate varied significantly less over the 3-h period of measurement in B-treated sparrows and siskins than in control birds. These results, coupled with observations of caged birds, suggest that corticosterone has no direct effect on avian resting metabolism but does reduce the responsiveness of birds to external stimuli and thus promotes nocturnal restfulness.

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