Effects of cortisol and growth hormone on osmoregulation in pre- and desmoltified coho salmon (Oncorhynchus kisutch)

General and Comparative Endocrinology
N H Richman, W S Zaugg


Salmonid species which undergo smoltification show a concurrent enhancement in saltwater (SW) osmoregulatory ability. This developmental change is marked by an increase in SW tolerance and gill Na+,K+-ATPase activity which appears to result, in part, from an increase in gill chloride cell density. Previous studies have suggested that cortisol and growth hormone (GH) may stimulate SW osmoregulatory mechanisms in salmonids. In this study, these hormones were examined for their ability to induce smoltification-associated osmoregulatory changes in pre- and desmoltified coho salmon (Oncorhynchus kisutch). Cortisol treatment for 12 days increased gill Na+,K+-ATPase activity in presmolts and gill residual (Na+,K+-independent) ATPase activity in both groups. Chloride cell density in presmolt primary and secondary lamellae and in desmolt secondary lamellae was increased as well. The rise in plasma sodium levels in fish transferred to SW was reduced only in desmolts. Treatment with bovine GH for 12-13 days increased gill Na+,K+-ATPase activity in presmolts and in desmolts. However, GH treatment in either group did not increase gill residual ATPase activity or alter plasma sodium levels in SW-transferred animals. Gill chloride cell densit...Continue Reading


Sep 1, 1985·General and Comparative Endocrinology·B A BartonR Patińo
Feb 1, 1986·The Journal of Endocrinology·M G Barron
May 1, 1986·General and Comparative Endocrinology·J P BoltonT Hirano
Jun 28, 1969·British Medical Journal
Mar 1, 1984·General and Comparative Endocrinology·T SandorA Z Mehdi
Jan 1, 1982·General and Comparative Endocrinology·J L Specker, C B Schreck
Mar 1, 1964·Experimental Cell Research·L T THREADGOLD, A H HOUSTON


Jul 1, 1994·Fish Physiology and Biochemistry·S C CornellJ L Specker
Jul 1, 1993·Fish Physiology and Biochemistry·T SakamotoT Hirano
Jun 1, 1989·Fish Physiology and Biochemistry·E G Grau, L M Helms
Aug 1, 1992·Comparative Biochemistry and Physiology. Comparative Physiology·A R BorgattiV Ventrella
Aug 1, 1997·Comparative Biochemistry and Physiology. Part A, Physiology·J Fuentes, F B Eddy
Mar 4, 1997·Proceedings of the National Academy of Sciences of the United States of America·B S ShepherdE G Grau
Nov 26, 2015·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Heather A StewartC B Schreck
Nov 1, 1991·General and Comparative Endocrinology·S D McCormickH A Bern
Nov 1, 1992·General and Comparative Endocrinology·E S GrayH A Bern
Apr 1, 1997·General and Comparative Endocrinology·T SakamotoE G Grau

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