La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Malaria infection status predicts extra-pair paternity in the blue tit
Auteurs :	Edyta Podmokla, Auteur ; Anna Dubiec, Auteur ; Aneta Arct, Auteur ; Szymon M. Drobniak, Auteur ; Lars Gustafsson, Auteur ; Mariusz Cichoń, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (46(3) MAY 2015)
Article en page(s) :	303-306
Langues:	Anglais
Résumé :	Extra-pair matings comprise a common reproductive strategy among socially monogamous bird species. However, it remains unclear why females decide to mate with extra-pair males. Indirect benefits in terms of improving offspring genetic quality are usually invoked to explain this phenomenon. Parasite resistance genes are often considered as a female target of seeking extra-pair matings, but the direct test of this hypothesis is generally lacking. Here, we report on a relationship between the status of infection with malaria parasites (Plasmodium and Haemoproteus) and occurrence of extra-pair paternity in a wild population of the blue tit Cyanistes caeruleus inhabiting Gotland (Sweden). We found that the probability of extra-pair paternity is significantly related to the infection status of social parents. Infected males showed higher probability of being cuckolded than uninfected ones. However, this was observed only among males mated to uninfected females. Thus, avian malaria may potentially contribute to explanation of extra-pair mating behaviour.

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