Sunday, 27 November 2016

The Clever Way Females Fend Off Male Fish with Big Genitals

By Charles Q. Choi, Live Science Contributor | November 23, 2016 09:47am ET 

Male mosquitofish with bigger genitals are typically best at coercing females into the "sack," but now researchers have found that females that are not interested in such pushy lovers grow bigger brains to fight back.

Having more brain power may give the females the smarts they need to find clever ways of avoiding male assaults, researchers said.

This is just one example of the arms race that takes place between the sexes. The conflict arises in the animal kingdom because of the different strategies that males and females often take when it comes to continuing their genetic legacies. Females of most species are typically seen as choosy about their mates, because they often have to pay a high biological price for bearing offspring. On the other hand, sex usually exacts a low biological toll on males, so an approach that they frequently pursue is to mate as often as possible.

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