ANNUAL CHANGES IN PLASMA LEVELS OF CORTISOL AND SEX STEROID HORMONES IN MALE RAINBOW TROUT, ONCORHYNCHUS MYKISS

被引：1
作者：
侯亚义
韩晓冬
机构：
来源：
Chinese Journal of Oceanology and Limnology | 2001年 / 03期
关键词：
rainbow trout; sex steroid hormones; cortisol;
D O I：
暂无
中图分类号：
Q959.4 [鱼纲];
学科分类号：
071002 ;
摘要：
The profiles of cortisol, testosterone, 11 ketotestosterone and 17α, 20β dihydroxy 4 pregnene 3 one in male rainbow trout reared under constant water temperature and natural photoperiod were determined by radioimmunoassay. Gonads of male rainbow trout reached maturity when the fish were two years old. Changes in the plasma levels of both sex steroid hormones and cortisol were closely related to the GSI. Plasma levels of testosterone, 11 ketotestosterone and 17α, 20β dihydroxy 4 pregnene 3 one showed a clear peak in the annual breeding season, when the GSI reached their maxima. Plasma cortisol levels also showed clearly seasonal changes in both two and three year old fish. The results suggest that the elevated plasma levels of cortisol may not just be due to stresses during the breeding season but have certain physiological functions in the reproduction of rainbow trout.
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页码：217 / 221
页数：5
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