Barn swallow antipredator behavior covaries with melanic coloration and predicts survival

Détails

ID Serval
serval:BIB_61E5254B7E64
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Barn swallow antipredator behavior covaries with melanic coloration and predicts survival
Périodique
Behavioral Ecology
Auteur⸱e⸱s
Costanzo A., Romano A., Ambrosini R., Parolini M., Rubolini D., Caprioli M., Corti M., Canova L., Saino N.
ISSN
1465-7279
ISSN-L
1045-2249
Statut éditorial
Publié
Date de publication
2018
Peer-reviewed
Oui
Volume
29
Numéro
6
Pages
1472-1480
Langue
anglais
Résumé
Conspecific individuals often consistently differ in their behavioral responses to specific exogenous stimuli. Such individual differences in "personality" have been shown to be heritable, suggesting that selection maintains variation in personality. However, survival selection on a major personality trait, antipredator behavior, and its sex-dependency, has been seldom measured in the wild. Here, we found that yearling barn swallows (Hirundo rustica) showed consistency in agitation upon repeated exposure to a restraint-handling protocol, probably reflecting antipredator behavior, and that males were more agitated than females. Females that exhibited larger antipredator behavior were more likely to survive until the next breeding season with no variation among 3 study years nor across 7 breeding colonies, suggesting that variation in antipredator behavior is not maintained by spatiotemporal variation in viability selection on antipredator behavior. In both sexes, the intensity of melanin-based ventral plumage coloration positively covaried with antipredator behavior, consistent with previous observations from diverse vertebrate species. In some barn swallow populations, male coloration is targeted by directional intersexual selection, suggesting that melanization signals antipredator behavior to prospecting females and that sexual selection for antipredator behavior, or other correlated personality traits, can drive the evolution of sexual color dimorphism in barn swallows. Thus, we showed that viability selection occurs on antipredator behavior and that spatiotemporal variation in selection has no major role in promoting variation in antipredator behavior. More melanized individuals were more agitated, implying that melanization may signal personality in a sexual communication context in a species where male coloration is an epigamic trait.
Mots-clé
antipredator behavior, Hirundo rustica, melanin-based coloration, personality, plumage color, survival
Web of science
Création de la notice
28/01/2019 11:40
Dernière modification de la notice
20/08/2019 15:18
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