A mechanism for diversity in warning signals: conspicuousness versus toxicity in poison frogs.

ABSTRACT: Many animals advertise their chemical defense to predators with conspicuous coloration and unpalatability, but little is known about the information in these signal elements. To effectively avoid predation, is it more advantageous to invest in increased conspicuousness or greater noxiousness, or to allocate equally to both signal modalities? Using natural variation among poison frog species measured with spectral reflectance and toxicity assays, we tested the relative importance of warning signal components with predator-learning and avoidance experiments. We demonstrate that closely related species use alternative strategies: increasing either conspicuousness or toxicity affords equivalent avoidance by predators and provides protection to nontoxic mimic species. These equally effective pr

SUBMITTER: Darst CR 

PROVIDER: S-EPMC1458662 | biostudies-literature | 2006 Apr

REPOSITORIES: biostudies-literature