摘要
研究了日本沼虾受精卵的核行为。结果表明 :日本沼虾在 2 1℃水箱中培养时 ,雌虾交配产卵后 0 .5 h,受精卵内仅出现 1个雌原核 ,未见雄原核 ;产卵后 1 .5 h,卵内同时出现雌原核和雄原核 ;产卵后 3 .5 h,雌原核和雄原核接近 ;产卵后 4h,雌原核和雄原核联合 ,形成合子核 ;产卵后 4.5 h,开始第一次有丝分裂 ;产卵后 7h,形成 2个核 ;产卵后 8h,形成
Studies on the chronological changes of the nucleus in fertilized egg of the fresh-water prawn, Macrobrachium nipponense, were followed. Female pronucleus was formed by 0.5 h after spawning, and male pronucleus by 1.5 h. The female and male pronuclei migrated towards each other and were in proximity by 3.5 h after spawing. Pronuclear association was completed by 4 h after spawning, and the zygote nucleus entered the first mitotic division soon. The first and second mitotic division were completed by 7h and 8 h after spawning resulting in a 2-nucleated and a 4-nucleated zygote, respectively.
出处
《东海海洋》
2001年第4期17-20,共4页
Donghai Marine Science
