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To explore the life cycle of Craspedacusta,the authors collected male and female specimens of the Craspedacusta sowerbyi xinyangensis in a small fire-fighting pond in Ningbo,Zhejiang Province in July,2005 and 2006.The development of C.sowerbyi xinyangensis was studied from zygote to medusa by means of light microscopy and digital camera.The zygotes of C.sowerbyi xinyangensis are globular and smooth(90-105 μm diameter)and have an equal,total cleavage to the two-cell stage 15 min after fertilization.The embry... 相似文献
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