海鳗性腺形态和发育的研究

STUDIES ON THE GONADAL MORPHOLOGY AND DEVELOPMENT OF PIKE CONGER MURAENESOX CINEREUS

本文对海鳗性腺的形态与组织结构及发育周年变化进行了研究。海鳗卵巢由许多紧密排列的卵巢叶片构成，精巢则由许多精巢叶片构成。整条卵巢或精巢的外部无被膜包裹。组织学观察表明，卵巢在５月下旬后陆续发育成熟，精巢在４月下旬陆续发育成熟。５月下旬进入繁殖期，６月～７月为繁殖盛期。随后，产过卵的个体进入恢复期并重新发育。组织学与扫描电镜观察显示，海鳗的精子头部呈镰刀形，有一较短的尾部。

Studies were carried out on the gonadal of pike conger, Mureanesox cinereus with regard to its morphological and histological features and annual maturation changes. The morphological observations show that, the ovary and the testes of pike conger consist with many lamella ovaries and lamella testes respectively. The morphological structure of ovary and testis is largely different from those of most other fishes. Histological observation on the gonadal shows that, some ovaries of individual pike conger develop into the maturation stage in the late April and individuals with matured ovaries increase sharply in May. So the reproductive period of pike conger is between May to August and the period between June to July is the most active.Microscopic and submicroscopic observation aslo show that,the sperm of pike conger has a sicklelike head and a relatively short tail.