La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Inconsistent pattern of extra-pair paternity in first and second broods of the Great Tit Parus major
Auteurs :	T. Lubjuhn, Auteur ; J. Brun, Auteur ; T. Gerken, Auteur ; J. T. Epplen, Auteur
Type de document :	Article
Dans :	Ardea (89(1) 2001)
Article en page(s) :	69-73
Résumé :	In this study we compare extra-pair paternity rates in first and second broods of 25 individual breeding pairs of the Great Tit Parus major. 24% of the first broods contained at least one nestling due to copulations outside the pair bond in contrast to 60% for second broods. The average proportion of extra-pair young per brood equalled 3.9 +/- 7.3% for first broods and 24.4 +/- 28.7% for second broods. Extra-pair paternity was not consistently observed in first and second broods, i.e. > 50% of the breeding pairs had extra-pair young in one but not the other brood. Some possible explanations for this inconsistent pattern are discussed.

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