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盘点孕育后代雄性动物:除草剂致雄青蛙产卵(2)

2010-03-12 08:12:26 中华网论坛

    2. 雄性贝司鱼变性并产卵

盘点孕育后代雄性动物:除草剂致雄青蛙产卵

雄性贝司鱼变性并产卵

    正如阿特拉津能导致雄青蛙变性一样,一些除虫药,甚至连处方药在污染了美国河流或其他水体后,都能导致一些鱼类变性。科研人员在2004年发现,波多马克河里的雄贝司鱼(Bass)甚至能产下鱼卵(上左图和下右图)。在当时所作的一项调查显示,波多马克河里42%的贝司鱼显示出雌雄同体的特征,79%的贝司鱼显示出性畸形的特征。一年后,在西弗吉尼亚州的河流里也发现了雌雄同体的鱼。最近,科研人员发现,抗抑郁类药物和其他一些废水化合物干扰了雄性鱼的内分泌系统,导致它们变性并产下鱼卵。

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