The effect of corticosterone on standard metabolic rates of small passerine birds
| Autor: | L. B. Astheimer, John C. Wingfield, William A. Buttemer |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
medicine.medical_specialty
Zonotrichia leucophrys Physiology Period (gene) Zoology Nocturnal Biochemistry Birds chemistry.chemical_compound Carduelis pinus Endocrinology Oxygen Consumption Species Specificity Corticosterone biology.animal Internal medicine medicine Animals Ecology Evolution Behavior and Systematics biology Metabolism Darkness biology.organism_classification Passerine Circadian Rhythm chemistry Basal metabolic rate Animal Science and Zoology Basal Metabolism |
| Zdroj: | Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology. 161(4) |
| ISSN: | 0174-1578 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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