黄颡鱼性腺与体重比例关系随时间的变化

The Relationship Between the Season and Mature Factor of Pelteobagrus fulvidraco

在7～11月间对2龄黄颡鱼的性腺变化进行研究,实验证明,黄颡鱼亲鱼的性腺在7月相对最发达,性成熟系数也最高,而后卵巢和精巢分别以不同速率退化吸收,雌鱼在10月左右性成熟系数达到1.2%左右越冬,而雄鱼在7～11月间性成熟系数持续下降。

The changes of the gonad in 2 yearsold fish between July and November were studied and the results indicated that the gonad matured in July and the mature factor was highest in July accordingly. Then the ovary and the testis degraded and absorbed in difference velocity,the mature factor of the female decreased to 1.2%in October and that of the male decreased persistently during the period.