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Auteur Esther Del Val |
Documents disponibles écrits par cet auteur (4)
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Article
Esther Del Val, Auteur ; Juan Jose Negro, Auteur ; Juan Carlos Senar, AuteurCapsule Mediterranean Great Tits showed a marked increase in levels of circulating carotenoids during moult and autumn.Aims To study seasonal variation in plasma carotenoid content during a whole annual cycle for Great Tits Parus major inhabitin[...]Article
Esther Del Val, Auteur ; Javier Quesada, Auteur ; Juan Carlos Senar, AuteurAdult birds usually display brighter plumage coloration than younger individuals. This difference may be either due to selection against less coloured yearlings or to an increase in coloration after their first complete moult. In this study, we [...]Article
Marc I. Foerschler, Auteur ; Esther Del Val, Auteur ; Franz Bairlein, AuteurNatal dispersal is a key component of population dynamics in birds. It guarantees the genetic exchange of populations, favours range expansions and reduces intraspecific competition. In general, natal philopatry of migratory passerines is quite [...]Article
Esther Del Val, Auteur ; Juan Jose Negro, Auteur ; Juan Garrido-Fernandez, Auteur ; Manuel Jaren, Auteur ; Antoni Borras, Auteur ; Josep Cabrera, Auteur ; Juan Carlos Senar, AuteurCarotenoid-based ornamentation shows great variability in Common Crossbill (Loxia curvirostra) males. Plumage colour ranges from dull yellow to bright red, but the majority of birds tend to be reddish-orange. It has been suggested that moult in [...]