摘要
于1984和1985年,运用放射免疫测定法研究了团头鲂(Megalobrama amblyce.phala)血清中睾酮(T)和11-氧睾酮(11-OT)的含量变化。结果表明,1.雄鱼血清中T在3月份和11月份各出现一次高峰,T浓度的周年变化与成熟系数(GSI)的周年变化之间无相关性;雄鱼血清的11-OT只在4月份出现一次高峰,11-OT浓度的周年变化与GSI的周年变化之间呈非常显著的相关性;成熟雄鱼经注射催产剂后,血清T水平明显上升,而11-OT水平略有下降。2.雌鱼血清T在4月份和7月份各出现一次高峰,T浓度的周年变化与GSI的周年变化呈显著相关性;成熟雌鱼经注射催产剂后,血清T水平极显著升高。
The changes of serum levels of testosterone (T) and 11-oxotestosterone (11-OT) were investigated in both sexes of blunt snout bream during an annual cycle and induced spawning in the years of 1984 and 1985 by means of radioimmunoassay. The results showed that in male, T showed two peaks in March (2.45±0.35ng/ml) and in November (1.17±0.06ng/ml). The annual change of T levels was not correlated with the annual change of gonadosomatic index (GSI), r=0.2892, P>0.05; 11-OT only peaked in April (32.84±5.30ng/ml), and the annual change of 11-OT levels was highly correlated with the annual change of GSI, r=0.8355, P<0.01. T level showed a significant increase (P<0.01), but 11-OT level showed a slight decrease (P>0.05) after being injected with human chorinic gonadotrophin (HCG). In female, T showed two peaks in April (5.03±0.45ng/ml) and in July (2.53±0.26ng/ml); the annual change of T levels was showed a correlation with the annual change of GSI (P<0.05). Mature females were injected with HCG + hypophysation, T and 11-OT levels showed a significant increase (P<0.01 and P<0.05).The results suggested that T stimulated not only testes development and spermarogenesis in spring, but also the testes recurrence in early winter for the next reproductive cycle. Serum T peak level in female was much higher than that in male during an annual cycle, T level increasing was in relation to the start of final maturation of oocytes with the stimulation of targe amount of gonadotropin (GTH). 11-OT increased with the testes development but it was not related to the spermiation.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1991年第5期412-416,共5页
Oceanologia Et Limnologia Sinica
