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Documents disponibles écrits par cet auteur (11)
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Article
Carlos E. Lara, Auteur ; Benedikt Holtmann, Auteur ; Eduardo S. A. Santos, Auteur ; Gabriel J. Castano-Villa, Auteur ; Shinichi Nakagawa, AuteurThe nestlings of many bird species have ornaments in their mouths, yet the within-species function of these ornaments remains relatively little studied compared with adult ornaments. Here, we describe the pattern of variation in the tongue spots[...]
Article
Simon D. Lamb, Auteur ; Helen R. Taylor, Auteur ; Benedikt Holtmann, Auteur ; Eduardo S. A. Santos, Auteur ; Jaime H. Tamayo, Auteur ; Sheri L. Johnson, Auteur ; Shinichi Nakagawa, Auteur ; Carlos E. Lara, AuteurCoprophagy by breeding birds, whereby parents eat the feces of their nestlings, is a common but rarely studied behavior. By eating feces, breeding parents may recycle nutrients. In many passerines, eating feces also reduces breeders' time away f[...]
Article
Shinichi Nakagawa, Auteur ; Robert P. Freckleton, AuteurThe most common approach to dealing with missing data is to delete cases containing missing observations. However, this approach reduces statistical power and increases estimation bias. A recent study shows how estimates of heritability and sele[...]
Article
Maria Karlsson, Auteur ; Julia Schroeder, Auteur ; Shinichi Nakagawa, Auteur ; Henrik G. Smith, Auteur ; Terry Burke, Auteur ; Helena Westerdahl, AuteurThe MHC (Major Histocompatibility Complex) plays an important role in the immune system of vertebrates. MHC genes are extremely polymorphic and this variation is considered to be maintained by selection from pathogens. We investigate whether MHC[...]
Article
Ian R. Cleasby, Auteur ; Shinichi Nakagawa, AuteurAlthough male age has often been found to predict success in gaining extra-pair paternity, it is unclear whether this gain is associated with an individuals success in avoiding cuckoldry. We examined the relationship between male age and both wi[...]
Article
Rebecca J. Laws, Auteur ; Sheena M. Townsend, Auteur ; Shinichi Nakagawa, Auteur ; Ian G. Jamieson, AuteurInbreeding depression is known to vary greatly between populations and among species. Some of this variation is due to differences in genetic load between populations, while some is due to differences in the environment (e.g. local weather condi[...]
Article
Shinichi Nakagawa, Auteur ; Terry Burke, AuteurIn many species, females prefer older males as social and genetic mates, and male secondary sexual traits often act as age indictor mechanisms. It has been reported that almost all the extra-pair paternity in one population and recently in anoth[...]
Article
Julia Schroeder, Auteur ; Ian R. Cleasby, Auteur ; Shinichi Nakagawa, Auteur ; Nancy Ockendon, Auteur ; Terry Burke, AuteurPassive integrated transponders (PITs) are increasingly used to study behaviour in small passerines. However, to ensure the reliability of such studies, knowledge of long-term fitness consequences of equipping passerines with PITs is crucial. We[...]
Article
Ian R. Cleasby, Auteur ; Shinichi Nakagawa, Auteur ; Terry Burke, AuteurWe assessed whether adult House Sparrows Passer domesticus adjusted their provisioning in response to an experimental increase in the nutritional condition of their nestlings. When we supplemented chicks directly with additional food, male paren[...]
Article
Julia Schroeder, Auteur ; Ian Cleasby, Auteur ; Hannah L. Dugdale, Auteur ; Shinichi Nakagawa, Auteur ; Terry Burke, AuteurProvisioning behavior in altricial birds is often used to measure parental investment and is assumed to have fitness consequences to the parents providing it, with the benefits outweighing the costs. Here we investigate the fitness costs and ben[...]
Article
Alfredo Sanchez-Tojar, Auteur ; Isabel Winney, Auteur ; Antje Girndt, Auteur ; Mirre J. P. Simons, Auteur ; Shinichi Nakagawa, Auteur ; Terry Burke, Auteur ; Julia Schroeder, AuteurFinding a high quality territory is essential for many animals to reproduce successfully. Despite its importance for fitness, we know little about the process of territory prospecting in wild birds, and whether individual traits and behaviours, [...]
