Plasma levels of insulin,glucagon and glucagon-like peptide in salmonids of different weights |
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| Authors: | Dr Anne Sundby K Eliassen T Refstie Erika M Plisetskaya |
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| Institution: | (1) AKVAFORSK, 6600 Sunndalsøra, Norway;(2) School of Fisheries HF-15, University of Washington, 98195 Seattle, WA, USA;(3) Department of Physiology and Nutrition, Norwegian College of Veterinary Medicine, P.O. Box 8146 Dep., 0033 Oslo 1, Norway |
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| Abstract: | Plasma levels of insulin in rainbow trout,Oncorhynchus mykiss, Atlantic salmon,Salmo salar, and Pacific coho salmon,Oncorhynchus kisutch and plasma circulating levels of glucagon and glucagon-like peptide, in rainbow trout and Atlantic salmon, were measured by homologous radioimmunoassays. Hormonal levels were compared against the average body weight of the same group of fish. Plasma insulin levels were significantly correlated (r=0.56, 0.46 and 0.42 respectively) with body weight in all three salmonid species. Moreover, rainbow trout from fast-growing families had significantly higher (p<0.005) plasma insulin levels than did fish from slow-growing families. Plasma titres of glucagon and glucagon-like peptide were always lower than insulin titres and did not correlate with body weight.Reported in part at Satellite Symposium on Applications of Comparative Endocrinology to Fish Culture, Almunecar, Spain (Sundby, 1989). |
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| Keywords: | salmonids body weight radioimmunoassays insulin glucagon glucagon-like peptide |
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