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螃蟹的生长周期
更新时间: 2020-09-24 00:00:00  

螃蟹的生长周期是1年。螃蟹生活在海里或近海区,也有一些栖于淡水或陆地。靠母蟹来生小螃蟹,每次母蟹都会产很多的卵,数量可达数百万粒以上。这些卵在母蟹腹部孵化后,幼体即可脱离母体,随着沿岸潮流到处浮游。经过几次退壳后,长成大眼幼虫,大眼幼虫再经几次退壳长成幼蟹,幼蟹外型几乎与成蟹相同,再经过几次退壳后就变成蟹。

关键词: 螃蟹 生长 周期

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