Stress-induced suppression of testosterone secretion in male alligators

The Journal of Experimental Zoology
V A Lance, R M Elsey

Abstract

In order to test the effect of acute stress on gonadal hormone secretion in reptiles, six mature male alligators were captured, and a blood sample was taken within 5 min of capture. Additional blood samples were taken at timed intervals for up to 41 hr, and plasma testosterone and corticosterone were measured by radioimmunoassay. Plasma testosterone declined to 50% of the initial value by 4 hr and dropped to less than 10% of initial by 24 hr. Plasma corticosterone increased during the first 12 hr, declined at 24 hr, and rose again at 40 hr. Blood samples from male alligators collected in North and South Carolina, south Florida, and in south Louisiana in two consecutive breeding seasons were also assayed for testosterone and corticosterone. In these populations there were significant differences in mean plasma testosterone and corticosterone levels. Elevated corticosterone levels were consistently seen in alligators caught in traps and from which a blood sample was taken several hours later. Plasma testosterone, although consistently lower in trapped alligators, did not show a negative correlation with plasma corticosterone. Farm-reared alligators bled once, released, and bled again at 24 hr also showed a highly significant supp...Continue Reading

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Citations

Apr 9, 1999·The Journal of Experimental Zoology·V A Lance, R M Elsey
Jul 13, 2002·The Journal of Experimental Zoology·C B Ganesh, H N Yajurvedi
Jun 8, 2013·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·D K Hews, A J Abell Baniki
Dec 31, 2003·General and Comparative Endocrinology·Valentine A LancePhillip L Trosclair
Jan 16, 2004·General and Comparative Endocrinology·Thea M EdwardsLouis J Guillette
Mar 5, 2003·Hormones and Behavior·Ignacio T Moore, Tim S Jessop
Aug 11, 2000·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·A CreeJ M Whittier
Jul 21, 2010·Proceedings of the National Academy of Sciences of the United States of America·David A CloseWeiming Li
Sep 11, 1999·General and Comparative Endocrinology·B S Nijagal, H N Yajurvedi
Dec 21, 2000·General and Comparative Endocrinology·H N Yajurvedi, B S Nijagal
Apr 24, 2001·General and Comparative Endocrinology·S BurmeisterW Wilczynski
Jan 10, 2013·General and Comparative Endocrinology·John F Cockrem
May 23, 2007·General and Comparative Endocrinology·Susannah S French, Michael C Moore
Jul 2, 2003·Journal of Neuroendocrinology·J C Wingfield, R M Sapolsky
Jul 14, 2012·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Ryan J Seddon, Matthew Klukowski
Aug 1, 1990·General and Comparative Endocrinology·C Dauphin-VillemantH Vaudry
Sep 19, 2006·General and Comparative Endocrinology·Victoria A Cartledge, Susan M Jones
Jan 1, 1987·The Journal of Experimental Zoology·V A Lance, K A Vliet
Jun 10, 2005·Journal of Experimental Zoology. Part A, Comparative Experimental Biology·H N Yajurvedi, Sneha Menon
Dec 31, 2019·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Satomi KohnoLouis J Guillette
Nov 23, 2018·Scientific Reports·Stefanny Christie Monteiro TitonFernando Ribeiro Gomes

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