| Titre : | Journal of Avian Biology 36(6) - NOV 2005 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
E. H. Chin, Auteur ;
O. P. Love, Auteur ;
A. M. Clark, Auteur ;
T. D. Williams, Auteur
In sexually size-dimorphic species, the larger sex can be more sensitive to stressful environmental conditions, often resulting in reduced growth and elevated mortality rates. Development of the immune system is regarded as highly resource depen[...]
Article
A. D. Fox, Auteur ;
J. Kahlert, Auteur
The "cost-benefit" hypothesis states that specific body organs show mass changes consistent with a trade-off between the importance of their function and cost of their maintenance. We tested four predictions from this hypothesis using data on no[...]
Article
G. R. Hepp, Auteur ;
T. H. Folk, Auteur ;
C. A. Manlove, Auteur
Incubating birds must balance their energetic demands with the time needed to provide care to developing embryos. Reduced care by incubating parents can result in longer incubation periods that increase predation risk and potentially influence n[...]
Article
G. Tavecchia, Auteur ;
N. Baccetti, Auteur ;
L. Serra, Auteur
Individual-based data on little terns Sterna albifrons at a post-breeding moulting area were used to investigate the spatial extent at which this site attract birds. Combining information collected on young terns, ringed at the natal colonies, w[...]
Article
M. Honza, Auteur ;
S. M. Kuiper, Auteur ;
M. I. Cherry, Auteur
The red-chested cuckoo Cuculus solitarius parasitises many passerines in Africa, but some common species sympatric with this brood parasite are rarely used as hosts. We tested the responses of three turdid hosts to parasitism with artificial cuc[...]
Article
P. F. Battley, Auteur ;
D. I. Rogers, Auteur ;
J. A. Van Gils, Auteur ;
T. Piersma, Auteur ;
C. J. Hassell, Auteur ;
A. Boyle, Auteur ;
Y. Hong-Yan, Auteur
In general, Arctic-breeding waders leave non-breeding grounds in Australasia from March (New Zealand) to mid-April (Northwest Australia). Here we provide evidence from radio-tracking and visual observations that many red knots Calidris canutus d[...]
Article
F. S. Lucas, Auteur ;
P. Heeb, Auteur
Despite their potential ecological and evolutionary importance, factors shaping the composition of bacterial communities in wild vertebrate populations remain poorly understood. The goal of this study was to examine the relative contributions of[...]
Article
L. Siefferman, Auteur ;
G. E. Hill, Auteur
Plumage coloration has been suggested to serve as an honest signal of benefits that males provide to females. One benefit proposed for females that choose to mate with elaborately colored males is that such males might provide more food resource[...]
Article
R. Lezalova, Auteur ;
E. Tkadlec, Auteur ;
M. Obornik, Auteur ;
J. Simek, Auteur ;
M. Honza, Auteur
In birds with hatching asynchrony and sexual size dimorphism, chicks hatched earlier and later in the laying sequence usually suffer different mortalities due to uneven abilities to compete for food, especially in poor years. If sexes differ in [...]
Article
J. T. Lifjeld, Auteur ;
A. M. A. Harding, Auteur ;
F. Mehlum, Auteur ;
T. Oigarden, Auteur
Extra-pair paternity is typically rather infrequent in seabirds, as in most other long-lived and socially monogamous birds. Here we report the first paternity study of the little auk Alle alle, a high arctic seabird which raises only a single ch[...]
Article
B. J. M. Stutchbury, Auteur ;
T. E. Pitcher, Auteur ;
D. R. Norris, Auteur ;
E. M. Tuttle, Auteur ;
R. A. Gonser, Auteur
Hooded warbler Wilsonia citrina males vary greatly in the frequency and duration of their off-territory forays in search of extra-pair copulations. We used radiotracking and microsatellite parentage analysis in high and low density populations t[...]
Article
Y. Yom-tov, Auteur ;
E. Geffen, Auteur
We tested the prediction that at higher latitudes there will be an increase in the number hosts per cuckoo species. This prediction is confirmed, and the number of hosts exploited per cuckoo species increases with increasing latitude. Although t[...]
Article
B. Rosivall, Auteur ;
E. Szollosi, Auteur ;
J. Torok, Auteur
Several hypotheses have been proposed to explain the adaptiveness of hatching asynchrony for the parents, but delayed hatching is generally detrimental for the late hatched young. These offspring often experience competitive disadvantage and del[...]
