Pesticide Turns Male Frogs into Females

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The pesticide atrazine can turn male frogs into females that are able to mate and successfully reproduce.
Here, two male frogs mating. The larger animal on the bottom has been completely feminized by
atrazine exposure and can produce viable eggs.

A commonly used pesticide known as atrazine can turn male frogs into females that are successfully able to reproduce, a new study finds.

While previous work has shown atrazine can cause sexual abnormalities in frogs, such as hermaphroditism (having both male and female sex organs), this study is the first to find that atrazine’s effects are long-lasting and can influence reproduction in amphibians.

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Weed Killer Affects Frogs Sexually

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Messed Up Frogs
The widely used weed killer atrazine affects the sexual development of frogs, raising questions about the effects of its use in the environment, the University of Ottawa said on Thursday.

A study by researchers at the university found that at low levels comparable to those measured in the Canadian environment, fewer tadpoles reached the froglet stage and the ratio of females to males increased.

“Atrazine is one of the top-selling herbicides used worldwide and was designed to inhibit weed growth in cornfields,” the university said in a statement.

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