| Titre : | Journal of Avian Biology 32(4) - DEC 2001 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
L. Serra, Auteur
Feather wear is the natural degradation and breakage of feather structure during the interval between moults. Different rates of feather wear have been observed for primaries of free-living populations of several species of passerines and waders[...]
Article
S. S. Taylor, Auteur ;
M. L. Leonard, Auteur ;
D. J. Boness, Auteur
Marine animals equipped with data recording devices sometimes show changes in their foraging behaviour, which can indicate an adverse effect of the instrument. We attached time-depth recorders (TDRs) and radio-transmitters to study foraging beha[...]
Article
T. C. Grubb, Auteur ;
C. L. Bronson, Auteur
Although not previously emphasized, colonization of habitat patches by cognitive animals involves both decisions bringing an animal to a particular patch and decisions causing the animal to remain in the patch. We focus on the latter form of dec[...]
Article
Matthieu Guillemain, Auteur ;
Patrick Duncan, Auteur ;
H. Fritz, Auteur
A major assumption in most models of foraging is that feeding and vigilance are mutually exclusive. A recent experimental study challenged this hypothesis and demonstrated that birds are able to detect predators while pecking seeds on the ground[...]
Article
D. K. Dowling, Auteur ;
D. S. Richardson, Auteur ;
K. Blaakmeer, Auteur
Many factors may affect symbiont distributions within host populations. Intrinsic factors, such as genotype, body condition and age may account for variations in symbiont loads between individuals. However, abiotic factors may also contribute to[...]
Article
J. Broggi, Auteur ;
L. Brotons, Auteur
According to the optimal body mass hypothesis, resident individuals, having priority of resource access and better knowledge of food availability in an area, should carry smaller fat reserves than transients whose resource predictability is lowe[...]
Article
M. Neuhauser, Auteur ;
W. Forstmeier, Auteur ;
F. Bretz, Auteur
Molecular paternity tests show that extra-pair fertilizations are common in many socially monogamous bird species. However, the question of why females often seek extra-pair copulations is still controversial. Competing alternative explanation,,[...]
Article
A. Velando, Auteur ;
C. M. Lessells, Auteur ;
J. C. Marquez, Auteur
Inca Terns Larosterna inca are medium-size seabirds that breed along the Peruvian and Chilean coast. They are monogamous and both sexes incubate and contribute to chick provisioning. The sexes are similar in appearance and have elaborate ornamen[...]
Article
R. D. Dawson, Auteur ;
G. R. Bortolotti, Auteur ;
G. L. Murza, Auteur
Natural selection theory suggests that there should be fitness consequences for animals that possess morphological abnormalities such as missing or deformed appendages and other structures. As these characters are expected to be detrimental, mor[...]
Article
E. T. Mezquida, Auteur ;
L. Marone, Auteur
We estimated nesting success of a breeding bird assemblage in the central Monte Desert in four breeding seasons (1995-1999). We analyzed the effect of year, period within the breeding season, nest type, and nest location on daily survival rates [...]
Article
K. A. Otter, Auteur ;
I. R. K. Stewart, Auteur ;
P. K. McGregor, Auteur ;
A. M. R. Terry, Auteur ;
T. Dabelsteen, Auteur ;
T. Burke, Auteur
Female Great Tits are known to eavesdrop on the singing behavior of males. It is unknown, however, whether manipulation of these signals is sufficient to influence extra-pair copulations, or whether such potentially costly reproductive decisions[...]
Article
The Yellow-legged Gull Larus cachinnans is monogamous with bi-parental incubation, In this studs. the effects of high levels of plasma testosterone in male Yellow-legged Gulfs during the incubation period were analysed. Tree-living male gulls we[...]
Article
We propose that growth bar size may indicate the quality of individuals in Styan's Grasshopper Warblers Locustella pleskei. Positive correlations of an individual's standardized growth bar width between years showed that some individuals of both[...]
Article
J. P. Robin, Auteur ;
C. Fayolle, Auteur ;
F. Decrock, Auteur ;
M. A. Thil, Auteur ;
S. D. Cote, Auteur ;
S. Bernard, Auteur ;
R. Groscolas, Auteur
In fasting-incubating seabirds, it has been proposed that egg abandonment and refeeding should be induced when a low body mass (BM) threshold is attained, thus ensuring adult survival at the expense of immediate breeding. In the context of life-[...]
Article
C. Barbraud, Auteur ;
H. Weimerskirch, Auteur
Recent studies have shown that the Antarctic Circumpolar Wave and the related sea-ice cover around the Antarctic continent may have a profound effect on the lower trophic levels of the marine environment. In particular, extensive sea-ice cover e[...]
