| Titre : | Journal of Avian Biology 39(6) - NOV 2008 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Martine Hausberger, Auteur ;
Emmanuel Bigot, Auteur ;
Philippe Clergeau, Auteur
Dialects may signal social or population identity and increase tolerance within communities. We hypothesized that in European starling Sturnus vulgaris communal roosts, birds coming from the same breeding area, i.e. dialectal zone, might tend to[...]
Article
Kate J. Neville, Auteur ;
Rachel Vallender, Auteur ;
Raleigh J. Robertson, Auteur
Sex ratio biases in avian species remain controversial, although several studies have documented apparent facultative adjustment of offspring sex ratios. While hybridizing pied and collared flycatchers have exhibited sex ratio skews that may be [...]
Article
Csaba Moskát, Auteur ;
Bengt Hansson, Auteur ;
Lilla Barabas, Auteur ;
Istvan Bartol, Auteur ;
Zsolt Karcza, Auteur
In Hungary an unusually high rate of parasitism on the great reed warbler Acrocephalus arundinaceus by the common cuckoo Cuculus canorus has been maintained for at least the last one hundred years. We evaluated parasitism rate, antiparasite defe[...]
Article
Juan F. Masello, Auteur ;
Thomas Lubjuhn, Auteur ;
Petra Quillfeldt, Auteur
The bright colours of parrots are caused by psittacofulvin pigments, which appear unique to this Order, and by structural colours. We measured red (psittacofulvin), green (mixed) and blue (structural) colours of wild burrowing parrots Cyanoliseu[...]
Article
Fabrice Helfenstein, Auteur ;
Tibor Szép, Auteur ;
Zsolt Nagy, Auteur ;
Bart Kempenaers, Auteur ;
Richard H. Wagner, Auteur
Sperm mobility is known to be an important determinant of a male's sperm competitive ability. Although more debated, sperm length and its relation to sperm swimming ability has also been proposed to determine a male's fertilisation potential. Fu[...]
Article
Karel Weidinger, Auteur
Videotaping is currently recognized as the most reliable method of predator identification at active bird nests but it is relatively expensive and labour intensive. While the number of published studies has increased over the past 10 years, the [...]
Article
Kyle H. Elliott, Auteur ;
Shoshanah R. Jacobs, Auteur ;
Julian Ringrose, Auteur ;
Anthony J. Gaston, Auteur ;
Gail K. Davoren, Auteur
Breeding Brunnich's guillemots Uria lomvia show stepwise mass loss at the time of hatch. This mass loss has usually been explained as an adaptation to reduce the cost of flight during the chick-rearing period because flight time increases during[...]
Article
Lars Svensson, Auteur ;
Robert Prys-Jones, Auteur ;
Pamela C. Rasmussen, Auteur ;
Urban Olsson, Auteur
We here report the finding of ten new specimens of the poorly known large-billed reed warbler Acrocephalus orinus. Preliminary identifications were made on the basis of bill, tarsus and claw measurements, and their specific identity was then con[...]
Article
Alexandre Roulin, Auteur ;
Caroline Colliard, Auteur ;
Flavien Russier, Auteur ;
Matthieu Fleury, Auteur ;
Valentin Grandjean, Auteur
Conflicts among siblings are widespread and their resolution involves complex physical and communication tools. Observations in the barn owl Tyto alba showed that siblings vocally communicate in the absence of parents to negotiate priority of ac[...]
Article
Ingunn M. Tombre, Auteur ;
Kjell A. Hogda, Auteur ;
Jesper Madsen, Auteur ;
Larry R. Griffin, Auteur ;
Eckhart Kuijken, Auteur ;
Paul Shimmings, Auteur ;
Eileen Rees, Auteur ;
Christine Verscheure, Auteur
An earlier onset of spring has been recorded for many parts of Eurasia in recent decades. This has consequences for migratory species, both in changing the conditions encountered by individuals on reaching migratory sites and in affecting cues r[...]
Article
R. Inger, Auteur ;
G. A. Gudmundsson, Auteur ;
G. D. Ruxton, Auteur ;
J. Newton, Auteur ;
K. Colhoun, Auteur ;
S. Auhage, Auteur ;
S. Bearhop, Auteur
There is considerable evidence to suggest that an animal's ability to access the appropriate resources at one time of year may profoundly restrict its performance at another. For migrants, wintering and breeding periods are often connected by re[...]
Article
Luke K. Butler, Auteur ;
Sievert Rohwer, Auteur ;
Markus G. Speidel, Auteur
Body feathers are important to many interactions birds have with their physical and social environments, such as streamlining the body for flight, thermoregulation, and social signaling. Birds differ dramatically in the texture of their body plu[...]
Article
Rebecca L. Bentzen, Auteur ;
Abby N. Powell, Auteur ;
Tony D. Williams, Auteur ;
Alexander S. Kitaysky, Auteur
We measured plasma concentrations of variables associated with lipid metabolism (free fatty acids, glycerol, triglyceride, and beta-hydroxybutyrate), protein metabolism (uric acid), and baseline corticosterone to characterize the nutritional sta[...]
Article
J. Mark Hipfner, Auteur ;
Laura A. McFarlane-Tranquilla, Auteur ;
BriAnne Addison, Auteur
According to the environmental cues hypothesis, female birds use information available to them in the early-season environment to fine-tune egg production annually. However, support for the hypothesis derives largely from correlational studies. [...]
