| Titre : | Journal of Avian Biology 37(6) - NOV 2006 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Juan Moreno, Auteur ;
Judith Morales, Auteur ;
Elisa Lobato, Auteur ;
Santiago Merino, Auteur ;
Gustavo Tomás, Auteur ;
Josue Martinez-de la Puente, Auteur
The signalling hypothesis of eggshell colouration in birds posits that females of species with blue-green eggs signal their phenotypic quality or the quality of their eggs to their mates through deposition of the antioxidant biliverdin as pigmen[...]
Article
Molecular clocks have seen many applications in ornithology, but many applications are uncritical. In this commentary, I point out logical inconsistencies in many uses of clocks in avian molecular systematics. I call for greater rigor in applica[...]
Article
Barbara Helm, Auteur
Recent findings in non-migratory birds have reopened questions about the interpretation and seasonal organization of Zugunruhe. I address the relationship between Zugunruhe and migration by comparing underlying circannual patterns in captive pop[...]
Article
David H. Ellis, Auteur ;
James W. Lish, Auteur ;
Marc Kéry, Auteur ;
Stephen M. Redpath, Auteur
From a year-long study of molt in the golden eagle Aquila chrysaetos, we recorded 2069 contour feathers replaced in 137 d (6 May-19 September). Very few contour feathers were lost outside this period. From precise daily counts of feathers lost, [...]
Article
Elisa Lobato, Auteur ;
Juan Moreno, Auteur ;
Santiago Merino, Auteur ;
Juan J. Sanz, Auteur ;
Elena Arriero, Auteur ;
Judith Morales, Auteur ;
Gustavo Tomás, Auteur ;
Josue Martinez-de la Puente, Auteur
During eight years of study of a population of pied flycatchers Ficedula hypoleuca breeding in central Spain, we observed throughout incubation
Article
Rebekah Christensen, Auteur ;
Sonia Kleindorfer, Auteur ;
Jeremy Robertson, Auteur
The shape and movement of the vocal tract are known to influence bird song. Current theory predicts that large bill and body size are correlated with low frequency song and slow trill rate. It is also widely accepted that song characteristics ar[...]
Article
Leo Joseph, Auteur ;
Thomas Wilke, Auteur ;
Jose ten Have, Auteur ;
R. Terry Chesser, Auteur
The white-browed woodswallow Artamus superciliosus and masked woodswallow A. personatus (Passeriformes: Artamidae) are members of Australia's diverse arid- and semi-arid zone avifauna. Widely sympatric and among Australia's relatively few obliga[...]
Article
Javier Quesada, Auteur ;
Juan Carlos Senar, Auteur
Birds frequently display a colourful plumage which is important both in inter and intraespecific communication, and either in sexual and social contexts. In last years some methodologies have been developed to, analyse plumage coloration, but th[...]
Article
Multi-factor analyses of territory quality in relation to fitness components of adults are rare, especially in non-migratory species. I studied the influence of multiple attributes of territory quality (habitat type and the abundance of food and[...]
Article
John L. Quinn, Auteur ;
Mark J. Whittingham, Auteur ;
Simon J. Butler, Auteur ;
Will Cresswell, Auteur
Background noise should in theory hinder detection of auditory cues associated with approaching danger. We tested whether foraging chaffinches Fringilla coelebs responded to background noise by increasing vigilance, and examined whether this was[...]
Article
Kathleen D. O'Connor, Auteur ;
Amy B. Marr, Auteur ;
Peter Arcese, Auteur ;
Lukas F. Keller, Auteur ;
Kathryn J. Jeffery, Auteur ;
Michael W. Bruford, Auteur
The concept of effective population size (N(e)) is used widely by conservation and evolutionary biologists as an indicator of the genetic state of populations, but its precision and relation to the census population size is often uncertain. Extr[...]
Article
Todd E. Katzner, Auteur ;
Evgeny A. Bragin, Auteur ;
Steven T. Knick, Auteur ;
Andrew T. Smith, Auteur
We evaluated the relationship between spatial variability in prey and food habits of eastern imperial eagles Aquila heliaca at a 90,000 ha national nature reserve in north-central Kazakhstan. Eagle diet varied greatly within the population and t[...]
Article
George S. Bakken, Auteur ;
Marilyn R. Banta, Auteur ;
Clay M. Higginbotham, Auteur ;
Aaron J. Lynott, Auteur
Ducklings reared by a hen swim with dry plumage a day or two after hatching, while incubator-hatched ducklings of the same age may sink and even drown when placed in water. The common interpretation is that wild-reared chicks receive preen oil f[...]
Article
I review previous models of the speed at which parent birds should fly when delivering food to their young. Norberg gives a graphical method of finding a parent's best flight speed. This speed maximizes the overall rate at which energy is delive[...]
