15
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      Sexual dimorphism and directional sexual selection on aposematic signals in a poison frog

      ,
      Proceedings of the National Academy of Sciences
      Proceedings of the National Academy of Sciences

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          It is commonly assumed that natural selection imposed by predators is the prevailing force driving the evolution of aposematic traits. Here, we demonstrate that aposematic signals are shaped by sexual selection as well. We evaluated sexual selection for coloration brightness in populations of the poison frog Oophaga [Dendrobates] pumilio in Panama's Bocas del Toro archipelago. We assessed female preferences for brighter males by manipulating the perceived brightness of spectrally matched males in two-way choice experiments. We found strong female preferences for bright males in two island populations and weaker or ambiguous preferences in females from mainland populations. Spectral reflectance measurements, coupled with an O. pumilio-specific visual processing model, showed that O. pumilio coloration was significantly brighter in island than in mainland morphs. In one of the island populations (Isla Solarte), males were significantly more brightly colored than females. Taken together, these results provide evidence for directional sexual selection on aposematic coloration and document sexual dimorphism in vertebrate warning coloration. Although aposematic signals have long been upheld as exemplars of natural selection, our results show that sexual selection should not be ignored in studies of aposematic evolution.

          Related collections

          Most cited references44

          • Record: found
          • Abstract: not found
          • Article: not found

          Signals, Signal Conditions, and the Direction of Evolution

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Sexual Selection, Social Competition, and Speciation

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Models of speciation by sexual selection on polygenic traits

              R Lande (1981)
                Bookmark

                Author and article information

                Journal
                Proceedings of the National Academy of Sciences
                PNAS
                Proceedings of the National Academy of Sciences
                0027-8424
                1091-6490
                November 10 2009
                November 10 2009
                November 10 2009
                October 26 2009
                : 106
                : 45
                : 19072-19077
                Article
                10.1073/pnas.0903327106
                2776464
                19858491
                5e877e6e-0ff7-4e25-a9d4-0707a98dd2aa
                © 2009
                History

                Comments

                Comment on this article