| Titre : | Journal of Avian Biology 42(5) - NOV 2011 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Kaspar Delhey, Auteur ;
Martin Carrizo, Auteur ;
Lucas Verniere, Auteur ;
Bettina Mahler, Auteur ;
Anne Peters, Auteur
Costs imposed by brood parasitic birds exert strong selection on their hosts to avoid parasitism. While egg rejection is a common defence, nestling rejection is rarer and less well understood. Theoretical models suggest that among non-evicting p[...]
Article
Jin-Won Lee, Auteur ;
Ben J. Hatchwell, Auteur
A growing number of bird species are known to have fine-scale genetic structure during the breeding season, with relatives breeding in close vicinity. Such genetic structure often has fitness consequences for parents, and sex ratio theory predic[...]
Article
Ugo Mellone, Auteur ;
Ruben Liminana, Auteur ;
Egidio Mallìa, Auteur ;
Vicente Urios, Auteur
We tagged two juvenile short-toed eagles in southern Italian peninsula with GPS satellite transmitters. According to previous visual observations, two different migratory routes for Italian short-toed eagles to reach Africa in autumn have been p[...]
Article
Lukasz Myczko, Auteur ;
Craig W. Benkman, Auteur
Relatively few animal species extract seeds from closed conifer cones because of the forces required to spread apart or penetrate the woody scales. Those species that forage on seeds in closed cones tend to forage selectively, and therefore act [...]
Article
Sandra L. Talbot, Auteur ;
Angela G. Palmer, Auteur ;
George K. Sage, Auteur ;
Sarah A. Sonsthagen, Auteur ;
Ted Swem, Auteur ;
Daniel J. Brimm, Auteur ;
Clayton M. White, Auteur
We compared levels of genetic diversity and isolation among peregrine falcons Falco peregrinus from two South Pacific island complexes (Fiji and Vanuatu: F. p. nesiotes), relative to other island and mainland populations. Fragment data from 12 m[...]
Article
A fundamental question in evolutionary biology is how phenotypic variation is maintained in the face of selection that ought to deplete that variation. Much research has investigated this question in traits favored via sexual selection in males,[...]
Article
Roslyn Dakin, Auteur
Both male and female peafowl grow crests on top of their head - iridescent blue in males, dull iridescent green and brown in females - but the potential signal function of this plumage ornament is unknown. In this study, peafowl crests were meas[...]
Article
David P. L. Toews, Auteur ;
Alan Brelsford, Auteur ;
Darren E. Irwin, Auteur
Hybrid zones between species provide natural systems for the study of processes involved in divergence, reproductive isolation and speciation. Townsend's Dendroica townsendi and black-throated green D. virens warblers are phenotypically and gene[...]
Article
Christopher M. Tonra, Auteur ;
Peter P. Marra, Auteur ;
Rebecca L. Holberton, Auteur
In migratory birds, the timing of departure from wintering grounds is often dependant on the quality of habitat on an individual's territory and may influence individual fitness, resulting in an interaction of life history stages across large ge[...]
Article
Vladimir Remes, Auteur ;
Beata Matysiokova, Auteur ;
Borivoj Klejdus, Auteur
Females can modify phenotype of their offspring through the deposition of biologically active compounds into eggs, including carotenoids, vitamins and other antioxidants. Understanding patterns of deposition is critical for better insight into t[...]
Article
James A. Gillies, Auteur ;
Adrian L. R. Thomas, Auteur ;
Graham K. Taylor, Auteur
We used an onboard inertial measurement unit, together with onboard and ground-based video cameras, to record the movements of the body, wings and tail of a steppe eagle Aquila nipalensis during wide-ranging flight. The eagle's flight consisted [...]
