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Weisbart M, Chakraborti PK, Gottschall F, et al. Effect of acid environments on cortisol and cortisol receptor activity in Atlantic salmon,Salmo salar. Fish Physiol Biochem. 1989;7(1):267-72doi: 10.1007/BF00004716.
Weisbart, M., Chakraborti, P. K., Gottschall, F., & Freeman, H. C. (1989). Effect of acid environments on cortisol and cortisol receptor activity in Atlantic salmon,Salmo salar. Fish physiology and biochemistry, 7(1), 267-72. https://doi.org/10.1007/BF00004716
Weisbart, M, et al. "Effect of acid environments on cortisol and cortisol receptor activity in Atlantic salmon,Salmo salar." Fish physiology and biochemistry vol. 7,1 (1989): 267-72. doi: https://doi.org/10.1007/BF00004716
Weisbart M, Chakraborti PK, Gottschall F, Freeman HC. Effect of acid environments on cortisol and cortisol receptor activity in Atlantic salmon,Salmo salar. Fish Physiol Biochem. 1989 Jun;7(1):267-72. doi: 10.1007/BF00004716. PMID: 24221781.
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Fish Physiol Biochem. 1989 Jun;7(1):267-72. doi: 10.1007/BF00004716.

Effect of acid environments on cortisol and cortisol receptor activity in Atlantic salmon,Salmo salar.

Fish physiology and biochemistry

M Weisbart, P K Chakraborti, F Gottschall, H C Freeman

Affiliations

  1. Department of Biology, St. Francis Xavier University, Antigonish, Nova Scotia, B2G 1C0, Canada.

PMID: 24221781 DOI: 10.1007/BF00004716

Abstract

The cytosol and nuclear extract of gill tissue obtained from laboratory held Atlantic salmon,Salmo salar manifested saturable cortisol binding of high affinity and low capacity (cytosol: Ka = 0.198 ± 0.024 × 10(9)/M, Nmax = 116.8 ± 20.8 fmol/mg protein; nuclear extract: Ka = 0.823 ± 0.057 × 10(7)/M, Nmax = 1563 ± 330 fmol/mg protein; n = 4). The cytosol receptor activity displayed high steroid and tissue specificity and a single binding peak at 191,000 Da following gel permeation chromatography.Atlantic salmon exposed for 3 or 8 months to waters from the Medway River (pH about 5.1), the Westfield River (pH about 4.8) and calcium carbonate treated Westfield River (pH about 5.6) showed no gill cytosol receptor activity. Cortisol receptor activity in the gill nuclear extracts from fish in limed Westfield River water in December (3 months) was less than half the activity in the fish treated with Medway River water (p < 0.05) although the plasma cortisol values were not different. In May (8 months), the plasma cortisol of fish in limed water was almost twice that of the fish held in acid Westfield River water (p = 0.058).

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