A Complete Collection of 100000 Whys
Fav十万个为什么
为什么珊瑚虫只在夜间产卵？
简单的摘要：珊瑚虫只在夜间产卵的原因主要是为了同步释放精卵提高受精率、避免紫外线对精卵的损伤、以及依赖月光和潮汐等环境信号触发产卵行为。
1、同步释放精卵提高受精率：珊瑚虫是固定生物，无法主动寻找配偶，因此它们通过同步释放大量精卵到海水中，增加精卵相遇的机会，从而提高受精率。
2、避免紫外线对精卵的损伤：夜间产卵可以避免白天强烈的紫外线对精卵造成伤害，保护精卵的存活率。
3、依赖月光和潮汐等环境信号触发产卵行为：珊瑚虫的产卵行为受到月光周期和潮汐的调控，夜间是这些环境信号最强的时间段，帮助珊瑚虫精准同步产卵。
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