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以伏尔加河—里海种群的夏季洄游冬季产卵群在溯河洄游开始时的俄罗斯鲟为例,确定性腺状况正常的雌鱼与生殖机能障碍情况下的血清中甾类激素浓度的差异。已确定,在卵巢滤泡闭索的早期,皮质素浓度升高,当性腺机能深度障碍时,皮质素浓度下降;观察到睾丸甾酮的含量也有下降的趋势。讨论鲟鱼雌鱼中观察到的生殖机能障碍的可能机理及其对生殖力和性周期洄游的影响。
Taking the summer migratory winter spawning population of the Volga-Caspian population as an example, the difference in serum concentrations of steroid hormones between female with normal gonadal status and reproductive dysfunction was examined at the beginning of anadromous migration. It has been determined that in the early stages of ovarian follicular closure, corticosteroid concentrations increase, and hypogonadal concentrations decrease when gonadal dysfunction is impaired; testosterone levels have also been observed to decline. Discuss the possible mechanisms of reproductive dysfunction observed in sturgeon females and their effects on fecundity and sexual cycle migration.