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旅鼠为什么要自杀

更新时间: 2020-08-20 00:00:00     

旅鼠的繁殖能力很强,当旅鼠数量达到高峰时,植被因遭到过度啃食而被破坏,食物不足、陷蔽条件恶化,它们考虑子孙后代的事,为了消除过剩的数量,主动的死亡是最好方式,它们只留下少数以繁衍后代之外,剩下的统统自杀。等到植被恢复时,它们的数量再节节攀升。

关键词: 为什么 自杀

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