Behavioral and hormonal effects of exogenous vasotocin and corticosterone in the green treefrog

General and Comparative Endocrinology
Sabrina S BurmeisterWalter Wilczynski

Abstract

Vasotocin (AVT) promotes courtship in a wide range of vertebrates. However, this effect is not independent of steroid hormones. For example, androgens may work in concert with AVT and corticosterone (CORT) may work to oppose AVT action. In frogs, AVT promotes calling, and in some species, CORT inhibits calling. In addition, androgens are known to modulate AVT in the brain, and CORT may depress androgen secretion. Previous work in amphibians has suggested that AVT promotes courtship by overcoming a CORT-mediated stress response. Possible behavioral and hormonal interactions among AVT, CORT, and androgens were investigated in wild, free-living green treefrogs (Hyla cinerea). Saline, AVT, CORT, or a combination of AVT and CORT were administered to calling males, and several measures of spontaneous calling were evaluated for 1.5 h following injection. Plasma testosterone, dihydrotestosterone, and CORT were also measured. Saline-injected males had low CORT levels, and AVT and CORT injection elevated plasma CORT levels. AVT increased the likelihood of calling, but, in males who did call, AVT did not influence latency to call or how often they were observed calling. Very few saline-injected males resumed calling after injection, and t...Continue Reading

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Citations

Oct 1, 2009·Integrative and Comparative Biology·Christopher J Leary
Jul 29, 2010·Brain, Behavior and Evolution·Erin L O'Bryant, Walter Wilczynski
Aug 22, 2012·Brain, Behavior and Evolution·Deborah I Lutterschmidt, Walter Wilczynski
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Oct 14, 2014·General and Comparative Endocrinology·Karla LombanaEmma Coddington
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Jul 19, 2005·Hormones and Behavior·Walter WilczynskiErin L O'Bryant
Aug 21, 2012·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Vania Regina de AssisFernando Ribeiro Gomes
Sep 21, 2010·General and Comparative Endocrinology·Corina L WackSarah K Woodley
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Aug 18, 2021·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Nicole Clapp, Michael S Reichert

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