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Population Social Structure Facilitates Indirect Fitness Benefits from Extra-Pair Mating [Frontiers in Ecology and Evolution]

par Frédéric Magné - publié le

Despite decades of research, empirical support for the “compatible genes” and “good genes” hypotheses as explanations for adaptive female extra-pair mating remains discordant. One largely un-tested theoretical prediction that could explain equivocal findings is that mating for compatible genes benefits should reduce selection for good genes. However, this prediction does not consider demographic parameters, such as social structuring, that can indirectly influence extra-pair paternity (EPP) outcomes. Drawing on evidence from a previous study, we re-evaluate this hypothesis whilst considering social structuring in a population of tui, Prosthemadera novaeseelandiae, a socially monogamous passerine.(...)

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