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Conspicuous male coloration impairs survival against avian predators in Aegean wall lizards, Podarcis erhardii [Ecology and Evolution]

Keywords : Camouflage ; predator avoidance, receiver vision, sexual communication, survival, trade-offs

par Frédéric Magné - publié le

Animal coloration is strikingly diverse in nature. Within-species color variation can arise through local adaptation for camouflage, sexual dimorphism and conspicuous sexual signals, which often have conflicting effects on survival. Here, we tested whether color variation between two island populations of Aegean wall lizards (Podarcis erhardii) is due to sexual dimorphism and differential survival of individuals varying in appearance. On both islands, we measured attack rates by wild avian predators on clay models matching the coloration of real male and female P. erhardii from each island population, modeled to avian predator vision.(...)

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