Cryptic female Strawberry poison frogs experience elevated predation risk when associating with an aposematic partner
| Autor: | Anders Ödeen, Anna Qvarnström, Björn Rogell, Julia Carolina Segami Marzal, Hanne Løvlie, Charlotte Rosher, Andreas Rudh |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Population Zoology Aposematism Oophaga 010603 evolutionary biology 01 natural sciences Zoologi sexual selection aposematism education Ecology Evolution Behavior and Systematics Nature and Landscape Conservation Original Research education.field_of_study Natural selection Ecology biology Oophaga pumilio Assortative mating biology.organism_classification crypsis 010601 ecology Mate choice speciation Sexual selection assortative mating Crypsis predation |
| Zdroj: | Ecology and Evolution |
| ISSN: | 2045-7758 |
| Popis: | Population divergence in sexual signals may lead to speciation through prezygotic isolation. Sexual signals can change solely due to variation in the level of natural selection acting against conspicuousness. However, directional mate choice (i.e., favoring conspicuousness) across different environments may lead to gene flow between populations, thereby delaying or even preventing the evolution of reproductive barriers and speciation. In this study, we test whether natural selection through predation upon mate‐choosing females can favor corresponding changes in mate preferences. Our study system, Oophaga pumilio, is an extremely color polymorphic neotropical frog with two distinctive antipredator strategies: aposematism and crypsis. The conspicuous coloration and calling behavior of aposematic males may attract both cryptic and aposematic females, but predation may select against cryptic females choosing aposematic males. We used an experimental approach where domestic fowl were encouraged to find digitized images of cryptic frogs at different distances from aposematic partners. We found that the estimated survival time of a cryptic frog was reduced when associating with an aposematic partner. Hence, predation may act as a direct selective force on female choice, favoring evolution of color assortative mating that, in turn, may strengthen the divergence in coloration that natural selection has generated. |
| Databáze: | OpenAIRE |
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