Spatial variation in the fitness of divergent aposematic phenotypes of the poison frog, Dendrobates tinctorius.

Abstract excerpt

Aposematic species use brightly coloured signals to warn potential predators of their unpalatability. The function of these signals is largely believed to be frequency-dependent. All else being equal, stabilizing selection is expected to constrain the evolution of novel signals. However, despite the expected frequency-dependent function of aposematic signals, interpopulation variation in aposematic signals is...

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