New ethology study findings reported from Campinas State University.

Science Letter | December 2, 2008 | Copyright

According to recent research published in the journal Ethology, "The males of numerous butterfly species fight with conspecific rivals to possess mating territories. Although there is little consensus on the nature of fight costs or on what traits favor victory, a recent analysis suggests that size may be of minor importance."

"However, data are inconsistent, and wing length, the metric that has been most widely used for expressing size in butterfly field studies, may not provide a reliable index of muscle mass or other traits that determine resource holding ...

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