Sexual selection affects climate adaptation in collared flycatchers
(English)Article in journal (Refereed) Submitted
The role of sexual selection in climate adaptation is debated. We tested whether sexual selection has the potential to speed up adaptation to new thermal environments in a natural population of collared flycatchers. Based on a three-year cross-fostering experiment, we found that the size of a sexually selected trait predicted offspring metabolic rate: male collared flycatchers with large forehead patches sired offspring with low metabolic rate regardless of the ambient temperature. Thus, there was a stable significant relationship between forehead patch size of genetic fathers and offspring metabolic rate. Nestlings with low metabolic rate experienced a survival advantage when growing under high temperatures, which is consistent with the prediction that a low metabolic rate confers a fitness advantage in warm climates. Our study shows that sexual selection can affect climate adaptation.
sexual selection, climate adaptation, resting metabolic rate, Ficedula flycatcher
IdentifiersURN: urn:nbn:se:uu:diva-309967OAI: oai:DiVA.org:uu-309967DiVA: diva2:1053216