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Pollution makes male birds mate with each other

科学家称:水污染使鸟儿变成同性恋
科学家称:水污染使鸟儿变成同性恋


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Water pollution is posing a threat to bird ­populations by causing males to mate with each other.

Scientists believe poisonous metal compounds entering the food chain can affect sexuality, causing a reduction in offspring.

They found that even relatively low levels of methylmercury in the diet of male white ibises caused the birds to pair up with each other, snubbing females. ...

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       环境污染的恶劣后果已然影响到了世界的各个角落,而且深受其害的远不止人类自己。近日,科学家实验证明,严重的水污染使得鸟儿变成了同性恋。

       最近科学家们通过研究发现,由于喝了受污染的水,白鹭的性取向开始发生变化,雄性白鹭更倾向于与同性结合,反而对异性白鹭表示出前所未有的冷淡。

       美国科学家皮特•弗兰德里克近日做了一项实验,将160只幼年白鹭分为4组,在它们的饮用水中填入不同剂量的水银,观察它们的反应和变化。

       第一组白鹭的饮用水中被放入百万分之0.3的水银;第二组含有百万分之0.1的水银;第三组的剂量是百万分之0.05,而第四组则是没放水银的纯净水。

       实验证明,饮用了这些含有水银的水之后,前三组白鹭中出现的同性恋现象明显多于第四组。很多雄性白鹭不仅与同性筑起了巢,而且还成双成对地在一起生活。

       弗兰德里克表示,科学家们已经知道水银会降低白鹭的雄性激素分泌,但让他们没有想到的是,水银还会导致他们变成同性恋,这会让白鹭的繁衍率大大降低。

       而更严重的是,其他鸟类也会受到类似的影响,它们的生存状态不容乐观。

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