| Titre : | Journal of Avian Biology 32(3) - SEP 2001 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
J. L. Lipar, Auteur
Hatching asynchrony in avian species often leads to the establishment of a size hierarchy among nestlings. Because the youngest nestlings in a brood are often at a significant disadvantage with respect to competition for parentally-delivered foo[...]
Article
J. Perez-Tris, Auteur ;
J. L. Telleria, Auteur
In many passerines, juveniles have shorter and more rounded wings than adults. Given that (1) long and pointed wings improve endurance in migratory flights, (2) shorter and rounded wings improve manoeuvrability, and (3) juvenile birds are more v[...]
Article
N. Kjellen, Auteur ;
M. Hake, Auteur ;
T. Alerstam, Auteur
Article
M. Czisch, Auteur ;
T. Coppack, Auteur ;
P. Berthold, Auteur ;
D. P. Auer, Auteur
For researchers working on the reproductive anatomy of birds, the standard tool has been the scalpel. We demonstrate. that magnetic resonance imaging (MRI) allows us to study non-invasively the testes and ovaries of small birds. Thus, repeated m[...]
Article
G. Blanco, Auteur ;
J. L. Tella, Auteur ;
J. Potti, Auteur ;
A. Baz, Auteur
Feather mites (suborder Astigmata, superfamilies Analgoidea, Pterolichoidea and Freyaniidae) are among the commonest ectosymbionts of birds. Most researchers have assumed they are parasites, having negative effects on hosts. Here we present evid[...]
Article
V. R. Cueto, Auteur ;
L. Marone, Auteur ;
J. L. de Casenave, Auteur
We analysed the effects of the design of feeding-preference experiments in a study of seed selection by Rufous-collared Sparrows Zonotrichia capensis. We presented eight seed options in multiple- and simple-offer experiments. Statistical results[...]
Article
S. Zehnder, Auteur ;
S. Akesson, Auteur ;
F. Liechti, Auteur ;
B. Bruderer, Auteur
We investigated the patterns of nocturnal bird migration in autumn 1998 at a coastal site on the Falsterbo peninsula in south-western Sweden, by means of a passive infrared device. In total 17411 flight paths, including track direction and altit[...]
Article
T. Wesolowski, Auteur ;
M. Stanska, Auteur
All studies of interactions between fleas and hole-nesting birds so far have been done in nestboxes. This study, which is the first study of flea infestation of nests of hole-nesters in natural holes, was carried out in the Bialowieza National P[...]
Article
N. Saino, Auteur ;
M. Incagli, Auteur ;
R. Martinelli, Auteur ;
R. Ambrosini, Auteur ;
A. P. Moller, Auteur
In altricial birds, asynchronous hatching often results in a size hierarchy among nestlings. However, laying order and hatching order may affect components of offspring condition differentially. Since parasites can have a heavy impact on their h[...]
Article
B. D. Gartrell, Auteur ;
S. M. Jones, Auteur
The relative importance of pollen as a source of protein to vertebrates is controversial. In nectarivorous psittacine birds, field studies support its importance, but an experimental study in a nectarivorous parrot showed that less than 7% of po[...]
Article
P. Galeotti, Auteur ;
R. Sacchi, Auteur
In this study we assessed territory turnover of the European Scops Owl Otus scops, a migratory nocturnal raptor, using sonagrams of hoots recorded in the same territories in the 1993 and 1994 breeding seasons. Three structural parameters of the [...]
Article
K. E. Arnold, Auteur ;
S. C. Griffith, Auteur ;
A. W. Goldizen, Auteur
The Noisy Miner Manorina melanocephala (Meliphagidae) is a cooperatively breeding bird species in which sons often remain on their natal home ranges and help one or both of their parents. In a population of Noisy Miners in SE Queensland, Austral[...]
Article
M. Honza, Auteur ;
J. Picman, Auteur ;
T. Grim, Auteur ;
V. Novak, Auteur ;
M. Capek, Auteur ;
V. Mrlik, Auteur
Brood parasitism represents a unique mode of avian reproduction that requires a number of adaptations. For example, to reduce chances of puncture ejection of their eggs by small hosts, brood parasites may have been selected for laying eggs of un[...]
Article
R. Przybylo, Auteur ;
D. A. Wiggins, Auteur ;
J. Merilä, Auteur
Territorial quality and parental quality are usually assumed to be the main sources of variation in the reproductive success of passerine birds. To evaluate their relative importance for variation in breeding time (itself an important factor for[...]
