Corticosterone manipulations alter morph-specific nestling provisioning behavior in male white-throated sparrows, Zonotrichia albicollis

Hormones and Behavior
Brent M Horton, Rebecca L Holberton

Abstract

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 var...Continue Reading

Citations

Jan 30, 2014·Proceedings of the National Academy of Sciences of the United States of America·Brent M HortonDonna L Maney
Apr 22, 2015·Hormones and Behavior·Sharon E Lynn
Mar 26, 2013·General and Comparative Endocrinology·Maren N Vitousek, L Michael Romero
Oct 16, 2015·Genes, Brain, and Behavior·W M Zinzow-KramerDonna L Maney
Sep 10, 2015·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Dominique A Potvin, Scott A MacDougall-Shackleton
Dec 1, 2015·American Journal of Veterinary Research·Meredith M ClancyJohn M Sykes
Mar 15, 2016·General and Comparative Endocrinology·Jennifer L BurtkaJennifer L Grindstaff
Nov 3, 2010·Molecular Ecology·Jeffrey S McKinnon, Michele E R Pierotti
Jan 23, 2017·General and Comparative Endocrinology·Federico VeraC Daniel Antenucci
May 10, 2017·Hormones and Behavior·Madeleine St Clair YewersDevi Stuart-Fox
Oct 7, 2017·Integrative and Comparative Biology·Pierre DevicheShelley Valle
Jun 24, 2020·Biology Letters·Mikus Abolins-Abols, Mark E Hauber
Jan 1, 2015·Conservation Physiology·Natalie M SopinkaSteven J Cooke
Sep 7, 2018·Proceedings. Biological Sciences·Mikus Abolins-Abols, Mark E Hauber

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