Testosterone, 11-ketotestosterone, and estradiol-17 beta modify baseline and stress-induced interrenal and corticotropic activity in trout

General and Comparative Endocrinology
T G PottingerP H Balm

Abstract

Estradiol-17 beta (E), 11-ketotestosterone (KT), and testosterone (T) were administered to immature rainbow and brown trout by implantation of steroid-containing cocoa butter pellets. This procedure elevated the levels of these hormones in the blood of the treated fish and had significant effects on plasma ACTH and cortisol levels in both unstressed and stressed rainbow trout and in stressed brown trout. E treatment significantly elevated resting levels of ACTH and cortisol and KT significantly suppressed resting ACTH levels in rainbow trout, although no effect of KT was noted on baseline cortisol levels. One hour of confinement stress increased ACTH levels in rainbow trout, but less so in T- and KT-implanted fish than in sham-implanted fish. A similar pattern was observed in stress-induced plasma cortisol levels where T and KT treatment of rainbow trout resulted in a more than 50% attenuation of plasma cortisol levels while E implantation significantly increased stress-induced plasma cortisol levels. In brown trout subjected to confinement stress for 96 hr, within 1 hr of the onset of confinement the stress-induced increase in plasma ACTH and plasma cortisol was significantly lower in T- and KT-implanted fish than in sham-impl...Continue Reading

Citations

Jun 21, 2011·Aquatic Toxicology·Nasim ReyhanianInger Porsch Hällström
Oct 28, 2010·General and Comparative Endocrinology·Meghan L M FuzzenGlen Van Der Kraak
Sep 12, 2015·Genome Génome / Conseil National De Recherches Canada·Andrea L KocmarekRoy G Danzmann
Mar 22, 2016·General and Comparative Endocrinology·Tom G PottingerPeter Matthiessen
Nov 5, 1997·General and Comparative Endocrinology·N L Staub, M De Beer
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Jan 31, 2017·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Bahram FalahatkarIraj Efatpanah
May 4, 2011·Fish Physiology and Biochemistry·Stefan HallgrenInger Porsch Hällström
Nov 15, 2019·Behavioral Ecology : Official Journal of the International Society for Behavioral Ecology·Harry R HardingAndrew N Radford
Jan 12, 2021·Immunogenetics·James H CampbellLindy M Whitehouse
Oct 13, 2020·General and Comparative Endocrinology·Karine RousseauSylvie Dufour

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