PMID: 3770435Jun 1, 1986Paper

Profiles of plasma sex steroids and gonadotropin in coho salmon, Oncorhynchus kisutch, during final maturation

General and Comparative Endocrinology
M S FitzpatrickC B Schreck

Abstract

The plasma concentrations of estradiol-17 alpha (E2), 17 mu-hydroxy-20 beta-dihydroprogesterone (DHP), progesterone, 11-ketotestosterone (11-KT), testosterone (T), and gonadotropin (GtH) were measured in adult coho salmon (Oncorhynchus kisutch) concomitantly with advancing maturation of the gonads during the spawning season. Concentrations of E2 were higher in females with eggs showing central (premigrating) germinal vesicles, migrating germinal vesicles, or peripheral germinal vesicles than in fish in which the eggs had undergone germinal vesicle breakdown or ovulation. Conversely, plasma levels of DHP were low at central, migrating, and peripheral germinal vesicle stages and then increased dramatically at germinal vesicle breakdown and ovulation. Levels of 11-KT, T, and GtH generally increased with advancing maturity of the eggs. When time rather than degree of maturation was used as a variable, plasma E2 was high in females first returning from the ocean but then dropped off precipitously in fish sampled at the end of the run. Plasma DHP followed the opposite pattern, being low in fish sampled early in the run and high in fish sampled late in the run. No easily discernible patterns emerged from the profiles of the other ster...Continue Reading

References

Sep 1, 1977·General and Comparative Endocrinology
Aug 1, 1973·General and Comparative Endocrinology·L W CrimE M Donaldson
May 1, 1981·General and Comparative Endocrinology·C G van BohemenJ Peute

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Citations

Jun 1, 1989·Fish Physiology and Biochemistry·M KobayashiI Hanyu
Jun 1, 1989·Fish Physiology and Biochemistry·C B SchreckR Patiño
Mar 1, 1991·Fish Physiology and Biochemistry·D L Berlinsky, J L Specker
Jun 1, 1987·Fish Physiology and Biochemistry·F W GoetzB Jalabert
Feb 1, 2006·Archives of Environmental Contamination and Toxicology·M A H WebbD T Gundersen
Jan 1, 1994·Life Sciences·J E RoylandM Fitzpatrick
Jan 1, 1989·Comparative Biochemistry and Physiology. C, Comparative Pharmacology and Toxicology·F D SikokiL R Curtis
Nov 1, 2002·General and Comparative Endocrinology·Molly A H WebbSerge I Doroshov
Nov 1, 2002·General and Comparative Endocrinology·P Mark LokmanGraham Young
Aug 21, 2003·General and Comparative Endocrinology·Takeshi OnumaAkihisa Urano
Feb 3, 2009·Journal of Toxicology and Environmental Health. Part a·Trond M KortnerAugustine Arukwe
Apr 14, 2010·Reproductive Biology and Endocrinology : RB&E·Diego CrespoJosep V Planas
Jul 4, 2003·Journal of Experimental Zoology. Part A, Comparative Experimental Biology·Francisco EstayNelson Colihueque
Feb 7, 2007·General and Comparative Endocrinology·Miskal SbaihiSylvie Dufour
Feb 1, 1988·General and Comparative Endocrinology·M KobayashiI Hanyu
Sep 1, 1987·General and Comparative Endocrinology·C A Lessman, H R Habibi
Aug 1, 1989·General and Comparative Endocrinology·N SakaiY Nagahama
Sep 1, 1989·General and Comparative Endocrinology·J M Trant, P Thomas
Jul 31, 2012·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Mia O HoogenboomDavid Costantini
Jul 21, 2006·The Journal of Steroid Biochemistry and Molecular Biology·Yung-Song Wang, Show-Wan Lou

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