论文部分内容阅读
本文总结了高州水库多年来在强化培育下家鱼一年两次产卵的生产实践经验,并从卵巢发育的细胞形态学和组织学进行了初步研究后指出:在这几类家鱼第一次刚产卵后的卵巢中可以观察到第Ⅱ、Ⅲ、Ⅳ时相卵母细胞同时并存,其中可以明显地见到处于早、中、晚期的第Ⅲ时相卵母细胞,它们在亲鱼强化培育下可以当年发育成第Ⅳ时相卵母细胞,如果对产后的亲鱼不进行强化培育,卵巢将退化至第Ⅱ期。家鱼卵巢中卵母细胞发育的非同步性,是获得一年多次产卵的内在因素。
This paper summarizes the production practices of Gaozhou reservoirs spawning twice a year under intensive breeding for many years and makes a preliminary study on the morphology and histology of ovary development. In the ovaries just after oviposition, it was observed that phase Ⅱ, Ⅲ and Ⅳ oocytes coexist at the same time, which can clearly see the phase Ⅲ oocytes in the early, middle and late stages, Under the cultivation can be developed into the fourth phase of the oocyte phase, if the parent broodstock is not after intensive breeding, ovarian degeneration to Phase II. The asynchronous development of oocyte in fish ovary is the internal factor to get spawning many times a year.