Show simple item record Chouteau, Mathieu Angers, Bernard
dc.coverage.spatial Peru 2012-11-12T18:09:41Z 2012-11-12T18:09:41Z 2012-3-28
dc.identifier doi:10.5061/dryad.7f4m96c3
dc.identifier.citation Chouteau M, Angers B (2012) Wright's shifting balance theory and the diversification of aposematic signals. PLoS ONE, 7(3): e34028.
dc.description Despite accumulating evidence for selection within natural systems, the importance of random genetic drift opposing Wright's and Fisher's views of evolution continue to be a subject of controversy. The geographical diversification of aposematic signals appears to be a suitable system to assess the factors involved in the process of adaptation since both theories were independently proposed to explain this phenomenon. In the present study, the effects of drift and selection were assessed from population genetics and predation experiments on poison-dart frogs, Ranitomaya imitator, of Northern Peru. We specifically focus on the transient zone between two distinct aposematic signals. In contrast to regions where high predation maintains a monomorphic aposematic signal, the transient zones are characterized by lowered selection and a high phenotypic diversity. As a result, the diversification of phenotypes may occur via genetic drift without a significant loss of fitness. These new phenotypes may then colonize alternative habitats if successfully recognized and avoided by predators. This study highlights the interplay between drift and selection as determinant processes in the adaptive diversification of aposematic signals. Results are consistent with the expectations of the Wright's shifting balance theory and represent, to our knowledge, the first empirical demonstration of this highly contested theory in a natural system.
dc.relation.haspart doi:10.5061/dryad.7f4m96c3/1
dc.relation.isreferencedby doi:10.1371/journal.pone.0034028
dc.relation.isreferencedby PMID:22470509
dc.subject Selection
dc.title Data from: Wright's shifting balance theory and the diversification of aposematic signals
dc.type Article *
dwc.ScientificName Ranitomeya imitator
dc.contributor.correspondingAuthor Chouteau, Mathieu
prism.publicationName PLoS ONE

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