Phenotypic and Genetic Divergence among Poison Frog Populations in a Mimetic Radiation
Twomey, Evan; Yeager, Justin; Brown, Jason Lee; Morales, Victor; Cummings, Molly; Summers, Kyle
The evolution of Müllerian mimicry is, paradoxically, associated with high levels of diversity in color and pattern. In a mimetic radiation, different populations of a species evolve to resemble different models, which can lead to speciation. Yet there are circumstances under which initial selection for divergence under mimicry may be reversed. Here we provide evidence for the evolution of extensive phenotypic divergence in a mimetic radiation in Ranitomeya imitator, the mimic poison frog, in Peru. Analyses of color hue (spectral reflectance) and pattern reveal substantial divergence between morphs. However, we also report that there is a “transition-zone” with mixed phenotypes. Analyses of genetic structure using microsatellite variation reveals some differentiation between populations, but this does not strictly correspond to color pattern divergence. Analyses of gene flow between populations suggest that, while historical levels of gene flow were low, recent levels are high in some cases, including substantial gene flow between some color pattern morphs. We discuss possible explanations for these observations.
Twomey, Evan, & Yeager, Justin, & Brown, Jason Lee, & Morales, Victor, & Cummings, Molly, & Summers, Kyle. (January 2013). Phenotypic and Genetic Divergence among Poison Frog Populations in a Mimetic Radiation. PLoS ONE, 8(2), 1- 10. Retrieved from http://hdl.handle.net/10342/5462
Twomey, Evan, and Yeager, Justin, and Brown, Jason Lee, and Morales, Victor, and Cummings, Molly, and Summers, Kyle. "Phenotypic and Genetic Divergence among Poison Frog Populations in a Mimetic Radiation". PLoS ONE. 8:2. (1-10), January 2013. August 21, 2018. http://hdl.handle.net/10342/5462.
Twomey, Evan and Yeager, Justin and Brown, Jason Lee and Morales, Victor and Cummings, Molly and Summers, Kyle, "Phenotypic and Genetic Divergence among Poison Frog Populations in a Mimetic Radiation," PLoS ONE 8, no. 2 (January 2013), http://hdl.handle.net/10342/5462 (accessed August 21, 2018).
Twomey, Evan, Yeager, Justin, Brown, Jason Lee, Morales, Victor, Cummings, Molly, Summers, Kyle. Phenotypic and Genetic Divergence among Poison Frog Populations in a Mimetic Radiation. PLoS ONE. January 2013; 8(2): 1-10. http://hdl.handle.net/10342/5462. Accessed August 21, 2018.