多鳞铲颌鱼性腺分化发育的组织学研究

Histological studies on gonadial differentiation and development of Varicorhinus macrolepis

用光镜和透射电镜对多鳞铲颌鱼(Varicorhinus macrolepis)性腺的分化发育进行组织学研究,观察了雌雄性腺的形成过程及各级生殖细胞的形态特征。结果表明,多鳞铲颌鱼卵巢和精巢开始分化的时间分别在80日龄和90日龄,雌鱼和雄鱼的性成熟年龄分别为36月龄和24月龄,精子和卵子的发育均可分为5个时期。在多鳞铲颌鱼的生长发育过程中,12月龄(雄鱼)和30月龄(雌鱼)性腺质量与体长、体质量之间具有极显著的相关关系。

The gonad differentiation and development of Varicorhinus macrolepis were studied by light microscopy and transmission electron microcopy, the different phases of germ cells and the formation process of gonad were observed. The results showed that the differentiation time of the ovary and testis was respectively 80 days and 90 days. It needs about 36 months for the female Varicorhinus macrolepis to develop into sexual maturity and male Varicorhinus macrolepis needs about 24 months. The development of sperm and ovum was divided into 5 stages. During the development of Varicorhinus macrolepis, the relationship between gonad mass and body length ＆ body mass was significantly correlative for 12 months（♂） and 36 months（♀）.