生命科学研究1999，Vol.3Issue(4)：308-315,8.
皮质醇的周年变化与雌性虹鳟性腺成熟的关系
Relationship between Annual Change in Plasma Cortisol Levels and Gonadal Development in Female Rainbow Trout,Oncorhynchus mykiss
摘要
Abstract
The present study showed plasma steroid hormone changes during the annual reprod uctive cycle of female rainbow trout under constant water temperature and natura l photoperiod. Female rainbow trout at three-year-old reached mature in their gonad. Changes in the plasma levels of both sex steroid hormones and cortisol we re highly correlated with those of GSI. Plasma levels of estradiol-17β and tes tosterone were highest in females sampled shortly before ovulation and declined in ovulated females, reaching lowest levels in postspawning fish. The concentrat ion of 17α, 20β- dihydroxy-4-pregnene-3-one rose markedly just before ovu lation and decreased after ovulation. Plasma cortisol level was high during spaw ning season and coefficient of plasma cortisol level with GSI was 0.86 at three-year-old fish. The results suggest that cortisol may exert s ome effects on reproduction of rainbow trout.关键词
虹鳟/性激素/皮质醇Key words
rainbow trout/sex steroid hormones/cortisol分类
生物科学引用本文复制引用
侯亚义,韩晓冬,铃木让..皮质醇的周年变化与雌性虹鳟性腺成熟的关系[J].生命科学研究,1999,3(4):308-315,8.基金项目
Supported in part by a grant from Pioneeri ng Research project in Biotechnology,the Ministry of Agriculture, Forestry and F isheries of Japan （）
