An Analysis of Predator Selection to Affect Aposematic Coloration in a Poison Frog Species

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dc.identifier.uri http://dx.doi.org/10.15488/10
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/28
dc.contributor.author Dreher, Corinna E.
dc.contributor.author Cummings, Molly E.
dc.contributor.author Pröhl, Heike
dc.date.accessioned 2015-07-28T16:09:47Z
dc.date.available 2015-07-28T16:09:47Z
dc.date.issued 2015-06-25
dc.identifier.citation Dreher, Corinna E.; Cummings, Molly E.; Pröhl, Heike: An Analysis of Predator Selection to Affect Aposematic Coloration in a Poison Frog Species. In: PLoS ONE 10 (2015), Nr. 6. DOI: http://dx.doi.org/10.1371/journal.pone.0130571
dc.description.abstract Natural selection is widely noted to drive divergence of phenotypic traits. Predation pressure can facilitate morphological divergence, for example the evolution of both cryptic and conspicuous coloration in animals. In this context Dendrobatid frogs have been used to study evolutionary forces inducing diversity in protective coloration. The polytypic strawberry poison frog (Oophaga pumilio) shows strong divergence in aposematic coloration among populations. To investigate whether predation pressure is important for color divergence among populations of O. pumilio we selected four mainland populations and two island populations from Costa Rica and Panama. Spectrometric measurements of body coloration were used to calculate color and brightness contrasts of frogs as an indicator of conspicuousness for the visual systems of several potential predators (avian, crab and snake) and a conspecific observer. Additionally, we conducted experiments using clay model frogs of different coloration to investigate whether the local coloration of frogs is better protected than non-local color morphs, and if predator communities vary among populations. Overall predation risk differed strongly among populations and interestingly was higher on the two island populations. Imprints on clay models indicated that birds are the main predators while attacks of other predators were rare. Furthermore, clay models of local coloration were equally likely to be attacked as those of non-local coloration. Overall conspicuousness (and brightness contrast) of local frogs was positively correlated with attack rates by birds across populations. Together with results from earlier studies we conclude that conspicuousness honestly indicates toxicity to avian predators. The different coloration patterns among populations of strawberry poison frogs in combination with behavior and toxicity might integrate into equally efficient anti-predator strategies depending on local predation and other ecological factors. eng
dc.description.sponsorship DFG/PR/626/4-1
dc.description.sponsorship DFG/PR/626/4-2
dc.description.sponsorship DAAD
dc.language.iso eng eng
dc.publisher San Francisco : Public Library of Science
dc.relation.requires http://dx.doi.org/10.6084/m9.figshare.1444357
dc.rights CC BY 4.0
dc.rights.uri http://creativecommons.org/licenses/by/4.0/
dc.subject Dendrobates-Pumilio eng
dc.subject Warning Signals eng
dc.subject Oophaga-Pumilio eng
dc.subject Natural-Selection eng
dc.subject Sexual Selection eng
dc.subject Visual Pigments eng
dc.subject Fiddler-Crab eng
dc.subject UCA-Tangeri eng
dc.subject Body-Size eng
dc.subject Conspicuousness eng
dc.subject Dendrobates pumilio ger
dc.subject Oophaga pumilio ger
dc.subject Warnsignal ger
dc.subject Natürliche Selektion ger
dc.subject Selektion ger
dc.subject Sexuelle Selektion ger
dc.subject Visuelle Pigmente ger
dc.subject Winterkrabbe ger
dc.subject Uca tangeri ger
dc.subject Größe ger
dc.subject Sichtbarkeit ger
dc.subject Auffälligkeit ger
dc.subject Erdbeerfrosch ger
dc.subject strawberry poison frog eng
dc.subject.classification Erdbeerfrosch ger
dc.subject.classification Warnsignal ger
dc.subject.classification Natürliche Auslese ger
dc.subject.classification Sexuelle Selektion ger
dc.subject.classification Visuelle Wahrnehmung ger
dc.subject.classification Uca tangeri ger
dc.subject.classification Körpergröße ger
dc.subject.classification Sichtbarkeit ger
dc.subject.ddc 590 | Tiere (Zoologie) ger
dc.title An Analysis of Predator Selection to Affect Aposematic Coloration in a Poison Frog Species eng
dc.type article
dc.type Text
dc.relation.issn 1932-6203
dc.relation.doi http://dx.doi.org/10.1371/journal.pone.0130571
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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