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为什么鱼要大量产卵?

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为什么鱼要大量产卵?

鱼之所以要产chu数量很多的卵,是因为单个鱼卵成活到成年的机会非常之小。大多数鱼要产下几万个卵,但此后便对其无能为力了,许多卵甚至在孵化以前就会被吃掉。那些像海ma、刺鱼之类能够给予后代某zhong形式的照料的鱼,产卵的数目一般要少一些。

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