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Documents disponibles écrits par cet auteur (10)
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Article
Oddmund Kleven, Auteur ; Aksel N. Fiske, Auteur ; Magnus Håvik, Auteur ; Rolf T. Kroglund, Auteur ; Jan E. Østnes, Auteur ; Tim Schmoll, AuteurBasic knowledge about the genetic mating system is lacking for the great majority of the approximately 10,000 extant bird species. Filling this knowledge gap is not only critical for a comprehensive understanding of the reproductive ecology of e[...]
Article
Tim Schmoll, Auteur ; Oddmund Kleven, AuteurInformation about male infertility in free-living bird populations and its underlying causes are poorly documented in the literature. Here, we assessed sperm quality and infertility among males in a wild population of Blue Tits Cyanistes caerule[...]
Article
Tim Schmoll, Auteur ; Wolfgang Winkel, Auteur ; Thomas Lubjuhn, AuteurMolecular genetic analysis of parentage revealed a low frequency of mixed maternity in broods of the Coal Tit, a socially monogamous passerine with a high frequency of extra-pair paternity. Mixed maternity was detected in four (= 0.8 %) out of 4[...]
Article
Do parental quality or extra-pair paternity affect offspring sex ratio in the coal tit (Parus ater)?
Verena Dietrich, Auteur ; Tim Schmoll, Auteur ; Wolfgang Winkel, Auteur ; Thomas Lubjuhn, Auteur
Article
Tim Schmoll, Auteur ; Verena Dietrich, Auteur ; Wolfgang Winkel, Auteur ; Joerg T. Epplen, Auteur ; Thomas Lubjuhn, Auteur
Article
Oddmund Kleven, Auteur ; Geir Rudolfsen, Auteur ; Tim Schmoll, AuteurExtra-pairmating is a common alternative reproductive strategy among socially monogamous bird species, but empirical data on the genetic mating systems of most species are still lacking. Here we present the first parentage study in the Grey-head[...]
Article
Extra-pair paternity and sperm length variation in a far northern Great Tit (Parus major) population
Oddmund Kleven, Auteur ; Jan Eivind Østnes, Auteur ; Geir Rudolfsen, Auteur ; Sonja Schindler, Auteur ; Tim Schmoll, AuteurExtra-pair paternity is common among socially monogamous bird species and considered an important driver of post-copulatory sexual selection on ejaculate traits including sperm traits. Patterns of extra-pair paternity and sperm size both show su[...]
Article
Tim Schmoll, AuteurThe evolutionary origin and the maintenance of extra-pair mating in birds has been a major field of study in the last decades, but no consensus has been reached on the adaptive significance of this behaviour for female birds. The genetic benefit[...]
Article
Tim Schmoll, Auteur ; Oddmund Kleven, AuteurThe evolutionary forces that shape and maintain variation in sperm traits across species in birds have recently attracted increased attention. Much less is known about the patterns, the causes and the consequences of variation in sperm traits wi[...]
Article
Verena Dietrich-Bischoff, Auteur ; Tim Schmoll, Auteur ; Wolfgang Winkel, Auteur ; Thomas Lubjuhn, AuteurThe magnitude of sexual size dimorphism can be affected by sex differences in environmental sensitivity early in ontogeny that result in differential growth rates of male and female nestlings. Here, the larger sex might either be more sensitive [...]
