| Corticosterone manipulations alter morph-specific nestling provisioning behavior in male white-throated sparrows, Zonotrichia albicollis. | |
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MedLine Citation:
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PMID: 19751738 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In the polymorphic white-throated sparrow (Zonotrichia albicollis), tan-striped males provision nestlings at higher rates than do white-striped males. In a previous study, we found that tan-striped males had lower baseline corticosterone levels than white-striped males during the nestling stage. To determine if this variation in corticosterone influences morph-specific differences in nestling provisioning behavior, we used intraperitoneal osmotic pumps to increase baseline corticosterone levels in tan-striped males (TS CORT) and administer RU486, a glucocorticoid receptor antagonist, in white-striped males (WS RU486). These manipulations essentially reversed morph-specific nestling provisioning behavior in males. TS CORT males fed nestlings at lower rates than TS controls (vehicle-only implant), and at similar rates to WS controls (vehicle-only implant), while WS RU486 males fed nestlings at higher rates than WS controls, and at similar rates to TS controls. These results demonstrate that (1) increases in baseline corticosterone (i.e., below concentrations associated with the adrenocortical response to stress) can directly or indirectly inhibit nestling provisioning behavior, and (2) corticosterone influences morph-specific variation in parental behavior in male white-throated sparrows. This study contributes to the growing evidence that modulating baseline CORT mediates parental care and self-maintenance activities in birds, and thus may serve as a mechanism for balancing current reproductive success with survival. |
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Authors:
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Brent M Horton; Rebecca L Holberton |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't Date: 2009-09-12 |
Journal Detail:
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Title: Hormones and behavior Volume: 56 ISSN: 1095-6867 ISO Abbreviation: Horm Behav Publication Date: 2009 Nov |
Date Detail:
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Created Date: 2009-11-09 Completed Date: 2010-02-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0217764 Medline TA: Horm Behav Country: United States |
Other Details:
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Languages: eng Pagination: 510-8 Citation Subset: IM |
Affiliation:
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Smithsonian Migratory Bird Center, National Zoological Park, 3001 Connecticut Avenue Northwest, MRC 5503, Washington, DC 20003, USA. hortonb@si.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological Analysis of Variance Animals Body Composition / physiology Choice Behavior Corticosterone / physiology* Female Hormone Antagonists / pharmacology Male Maternal Behavior Mifepristone / pharmacology Nesting Behavior / drug effects, physiology* Paternal Behavior* Phenotype Pigmentation Polymorphism, Genetic / physiology Receptors, Glucocorticoid / antagonists & inhibitors Sparrows / physiology* |
| Chemical | |
Reg. No./Substance:
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0/Hormone Antagonists; 0/Receptors, Glucocorticoid; 50-22-6/Corticosterone; 84371-65-3/Mifepristone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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