| Titre : | Journal of Avian Biology 37(2) - MAR 2006 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
S. Casagrande, Auteur ;
D. Csermely, Auteur ;
E. Pini, Auteur ;
V. Bertacche, Auteur ;
J. Tagliavini, Auteur
In the context of sexual selection carotenoid based signals are candidates for indicator traits: they have to be taken up in the diet by animals, they can indicate the ability of the bearer to accumulate a limited resource, and they help in main[...]
Article
D. R. Ardia, Auteur ;
C. B. Cooper, Auteur ;
A. A. Dhondt, Auteur
The onset of incubation varies in birds, with many species beginning incubation prior to clutch completion. Here we examine whether early onset is more likely to occur during high temperatures, a critical prediction of the egg-viability hypothes[...]
Article
S. Ward, Auteur ;
D. M. Bryant, Auteur
Birds might form eggs from stored nutrients, from current food intake or from both. We examined whether stored nutrients were a substantial resource for egg production in an aerial insectivore, which had a variable food supply, but for which the[...]
Article
M. Poisbleau, Auteur ;
H. Fritz, Auteur ;
M. M. Lambrechts, Auteur ;
C. Trouve, Auteur ;
B. S. Ebbinge, Auteur
We document seasonal changes in body mass and plasma hormone levels (testosterone and triiodothyronine) between winter and spring quarters in dark-bellied brent geese Branta bernicla bernicla. Body mass increased between winter and spring, where[...]
Article
O. K. Mikami, Auteur
Despite many decades of study, scientists cannot answer why colonial breeding has evolved. This paper shows that the evolution of colonial breeding cannot be sufficiently explained by the evolutionary conditions proposed in previous studies. Unt[...]
Article
When a predator is not an immediate threat, a prey may produce relatively loud alarm calls because the risk is low. Since such calls could nevertheless attract acoustically oriented predators, the cost of predator attraction must be outweighed b[...]
Article
G. Gronstol, Auteur ;
D. Blomqvist, Auteur ;
R. H. Wagner, Auteur
Intra-specific brood parasitism is widespread among birds. When genetic evidence is not available, criteria like super-normal clutch size, high within-clutch variance in egg morphology, and shorter than normal laying intervals have been used to [...]
Article
H. A. Middleton, Auteur ;
C. A. Morrissey, Auteur ;
D. J. Green, Auteur
American dipper Cinclus mexicanus populations are frequently composed of resident individuals that occupy permanent territories year round and migratory individuals that overwinter with residents but migrate to breeding territories on higher ele[...]
Article
P. Post, Auteur ;
F. Gotmark, Auteur
Bright plumage, song display, and aggressive resource defence in males may cause higher predation on males than on females during the breeding season. However, in birds, higher predation on females is sometimes observed. Parental investment may [...]
Article
T. Bregnballe, Auteur
Age-related reproductive performance of great cormorants Phalacrocorax carbo sinensis was studied in a tree nesting colony in Denmark in relation to age-related improvements of competence and progressive disappearance of phenotypes. Within-indiv[...]
