论文部分内容阅读
本文对泰山螭霖鱼(Varicorhinus macrolepis)卵巢的组织结构在年周期中的变化规律进行了研究。结果表明: 泰山螭霖鱼卵母细胞的发育过程在年周期中分为6个时相。卵巢发育分期依卵巢切面中所占面积超过50%或居最高比例的卵母细胞的时相来划分,分期情况如下:2-4月份,卵巢由Ⅳ期发育至第Ⅴ期,4月份进入繁殖期;4-6 月份,为第Ⅴ期;6月下旬-7月份为第Ⅵ期,是排卵后退化阶段;8月份,为Ⅱ期卵巢(休整期);9月份-翌年的1 月份为第Ⅲ期,并以Ⅲ期卵巢越冬。由研究结果可知:泰山螭霖鱼为短期分批产卵类型,一年产卵一次。
In this paper, the changes of the ovarian tissue structure in Varicorhinus macrolepis in the annual cycle were studied. The results showed that the developmental process of Tailai chinense oocyte was divided into 6 phases in the annual cycle. Ovarian staging is divided according to the time phase of the oocyte in which the area of the ovarian section accounts for more than 50% or the highest proportion. The staging is as follows: From February to April, the ovary develops from stage Ⅳ to stage Ⅴ and enters breeding in April Period from April to June, stage Ⅴ, late June to July as stage Ⅵ, post-ovulation degenerative stage, August as stage II ovary (rest period), September-January of the following year Ⅲ, and Ⅲ ovarian overwintering. The results show that: Taishan Du Lin fish is a short-term batch-type spawning, laying eggs once a year.