| Titre : | Journal of Avian Biology 41(3) - MAY 2010 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Ron W. Summers, Auteur ;
Robert J. G. Dawson, Auteur ;
Robert Proctor, Auteur
The breeding biology and cone size selection of crossbills was studied mainly during 1995 to 2002 at Abernethy Forest, Scotland, an ancient native Scots pine Pinus sylvestris wood, where only a single crossbill species, the Scottish crossbill Lo[...]
Article
Oscar Vedder, Auteur ;
Jan Komdeur, Auteur ;
Marco Van Der Velde, Auteur ;
Michael J. L. Magrath, Auteur
Article
Lorenzo Serra, Auteur ;
Simone Pirrello, Auteur ;
Davide Licheri, Auteur ;
Matteo Griggio, Auteur ;
Andrea Pilastro, Auteur
There is growing evidence that moult speed affects plumage quality. In many bird species, males and females differ in terms of breeding effort, survival expectation and the relationship between fitness and plumage quality. Consequently, differen[...]
Article
Susan J. Cunningham, Auteur ;
Isabel Castro, Auteur ;
Thomas Jensen, Auteur ;
Murray A. Potter, Auteur
Birds that forage by probing must often rely on sensory systems other than vision to detect their buried prey. Such senses may include hearing (e.g. Australian magpies (Atramidae), American robins (Turdidae)) or chemical senses/olfaction (e.g. k[...]
Article
Paul A. Smith, Auteur ;
H. Grant Gilchrist, Auteur ;
Mark R. Forbes, Auteur ;
Jean-Louis Martin, Auteur ;
Karel Allard, Auteur
Arctic breeding shorebirds travel thousands of kilometres between their wintering and breeding grounds, yet the period over which they arrive and begin to initiate nests spans only several weeks. We investigated the role of local conditions such[...]
Article
Iván De la Hera, Auteur ;
Anders Hedenstroem, Auteur ;
Javier Pérez-Tris, Auteur ;
José Luis Tellería, Auteur
Migration causes temporal and energetic constraints during plumage development, which can compromise feather structure and function. In turn, given the importance of a good quality of flight feathers in migratory movements, selection may have fa[...]
Article
Alaine F. Camfield, Auteur ;
Scott F. Pearson, Auteur ;
Kathy Martin, Auteur
Environmental variation along elevational gradients can strongly influence life history strategies in vertebrates. We investigated variation in life history patterns between a horned lark subspecies nesting in high elevation alpine habitat Eremo[...]
Article
The offspring of caring parents may evolve specialized traits uniquely adaptive during their dependence on parental care. For example, the mouths of passerine nestlings are often bordered by enlarged and colorful rictal flanges expressed only du[...]
Article
Svein Dale, Auteur ;
Peder Christiansen, Auteur
In order to understand habitat selection in birds, it is important to know how individuals respond when encountering a variety of habitats during dispersal and must choose between them. However, very few field studies have addressed this questio[...]
Article
Scott Wilson, Auteur ;
Kathy Martin, Auteur
Predicting how animal populations respond to climate change requires knowledge of how species traits influence the response of individuals to variation in anuual weather. Over a four-year study with two warm and two cold years, we examined how s[...]
Article
Trond Oigarden, Auteur ;
Thomas Borge, Auteur ;
Jan T. Lifjeld, Auteur
Passerine bird species vary considerably in the frequency of extrapair paternity, but the factors causing this variation are not well understood. There is some comparative evidence that extrapair paternity is associated with the population level[...]
Article
Haw Chuan Lim, Auteur ;
Frederick H. Sheldon, Auteur ;
Robert G. Moyle, Auteur
Extensive plumage color polymorphism in the oriental dwarf kingfisher Ceyx erithaca has long intrigued ornithologists of the Indo-Malayan region. A large proportion of birds in Sumatra, Peninsular Malaysia and Borneo have plumages intermediate b[...]
Article
Isabel Castro, Auteur ;
Susan J. Cunningham, Auteur ;
Anna C. Gsell, Auteur ;
Klaus Jaffe, Auteur ;
Aivle Cabrera, Auteur ;
Carmen Liendo, Auteur
Article
Martin U. Grueebler, Auteur ;
Beat Naef-Daenzer, Auteur
In seasonal environments, avian reproductive performance almost generally declines in the course of the season. Quantifying the associated fitness consequences of timing of breeding, i.e. of date-related factors, is important for understanding t[...]
Article
Gergely Hegyi, Auteur ;
Hubert Schwabl, Auteur
Avian eggs contain variable levels of several maternal androgens that may all be important in adjusting offspring phenotype at the individual or brood level. Most studies have focused on experimental manipulations of testosterone (T), and the ot[...]
Article
Fredrik Haas, Auteur ;
Jonas Knape, Auteur ;
Anders Brodin, Auteur
The relatively narrow hybrid zone between hooded and carrion crow is characterised by a high proportion of breeding hybrids, no known intrinsic postzygotic costs, and most likely, high gene flow between populations. It is therefore of interest t[...]
Article
The uropygial gland is an organ exclusive of birds that secretes an oily substance, the uropygial secretion, the functions of which are still debated. One of the proposed hypothesis is its possible action against chewing lice (order Phthiraptera[...]
