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It's what she likes

作者:郏吡召    发布时间:2019-03-08 05:07:01    

FEMALES may be able to shape the evolution of their mates to suit their fancy, according to a study of mosquito fish. In the wild, the females of 45 species of mosquito fish do not appear to be choosy about their mates. But James Gould and his colleagues at Princeton University put female fish in an aquarium with models of males with exaggerated features—such as huge dorsal or tail fins—that never appear in nature. The team found that the females spent twice as long with well-endowed males. But they stayed away from males that were oversized as a whole or had more fins than usual (Current Biology, vol 9, p 497). The researchers suggest that such latent female preferences, rather than a simple response to existing features,

 

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