New ethology data have been reported by scientists at University of Bielefeld.

Science Letter | February 24, 2009 | Copyright

According to recent research published in the journal Ethology, "In an influential review, acoustic courtship traits of frogs were classified into the two categories, static and dynamic traits, based on their coefficients of variation and female preference functions. As stabilizing selection can be expected to diminish phenotypic variation, static traits showing comparatively low variation were assumed to be mainly influenced by stabilizing selection through female choice."

"The more variable dynamic traits on the other hand were proposed to be under directional or ...

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