| Titre : | Journal of Avian Biology 32(2) - JUN 2001 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
S. Bures, Auteur ;
K. Weidinger, Auteur
How birds respond to the recent phenomenon of calcium deficiency in acidified areas is still poorly known. This study, carried out in the Jeseniky Mountains (heavily polluted, acidified area in the Czech Republic), in alpine ecosystems of centra[...]
Article
Y. Watanuki, Auteur ;
F. Mehlum, Auteur ;
A. Takahashi, Auteur
We describe the features of waters where seabirds were feeding by sampling vertical water temperature profiles with data loggers mounted on five Brunnich's Guillemots in Svalbard, Norway. The guillemots foraged in a cold water (-0.5-0.5 degreesC[...]
Article
J. V. Briskie, Auteur ;
R. Montgomerie, Auteur
The absence of an intromittent organ (IO) in most species ( > 97%) of birds is an enigma: birds are the only terrestrial vertebrates in which insemination typically occurs without the use of an IO. In an earlier review, we evaluated six hypothes[...]
Article
K. P. Able, Auteur
As understanding of the processes and mechanisms of bird navigation has increased, older conceptual frameworks and terminology have become inadequate. Terminology used to refer to orientation and navigation behaviour have acquired varied and div[...]
Article
K. L. Wiebe, Auteur ;
T. L. Swift, Auteur
We analysed clutch size versus nest size in 153 broods of the Northern Flicker Colaptes auratus a woodpecker using natural cavities in British Columbia. Canada. Larger volume cavities were less susceptible to predation and cavity size was positi[...]
Article
O. Olsson, Auteur ;
J. Bonnedahl, Auteur ;
P. Anker-Nilssen, Auteur
Extra-pair paternity (EPP) in monogamous birds may result from either extra-pail copulations (EPCs) or mate switching. In this study of King Penguins in South Georgia, we observed no EPCs at all, an effect of very efficient mate guarding. Onshor[...]
Article
P. Heeb, Auteur
In socially monogamous birds, males benefit from frequent copulations with their partner if this increases their paternity in the brood. By soliciting and accepting copulation attempts, female birds can control pair copulation frequencies. Engag[...]
Article
C. G. Guglielmo, Auteur ;
J. G. Burns, Auteur
We describe the development of a method to predict percent body fat of killed birds from the percent fat in the most distal wing tissue, which is often left uneaten by aerial predators. When combined with a measure of body structural size, such [...]
Article
Article
T. Wesolowski, Auteur
Article
G. I. Miura, Auteur ;
S. V. Edwards, Auteur
Sequence variation was examined in domain I of the mitochondrial control region in three Queensland populations of Hall's Babbler Pomatostomus halli. a geographically restricted, monotypic songbird in eastern Australia. Surprisingly, we found th[...]
Article
R. G. Nager, Auteur ;
P. Monaghan, Auteur ;
D. C. Houston, Auteur
Measurements of costs of reproduction are essential for our understanding of the evolution of reproductive effort. While in birds the effects of increased chick-rearing effort on subsequent survival and fecundity have been relatively well studie[...]
Article
Molecular evidence for phylogenetic relationships among buntings and American sparrows (Emberizidae)
A. Grapputo, Auteur ;
A. Pilastro, Auteur ;
A. J. Baker, Auteur ;
G. Marin, Auteur
To help clarify controversial phylogenetic relationships within the Family Emberizidae. we sequenced 1238 bp of mitochondrial DNA From the cytochrome b gene and a flanking portion of ND5. Although the longspurs (Calcarius) and the snow buntings [...]
Article
A. M. Stoehr, Auteur ;
G. E. Hill, Auteur
The majority of studies examining the role of hormones in the proximate mechanisms of plumage coloration in birds have focused on intersexual differences (plumage dichromatism) and on structural- or melanin-based plumage coloration. The relation[...]
Article
J. C. Coulson, Auteur ;
J. A. Fairweather, Auteur
The breeding of Black-legged Kittiwakes Rissa tridactyla in their last breeding season has been compared with that of pairs which survived to the next breeding season. The lime of laying was not affected but the clutch size. breeding success and[...]
Article
W. Forstmeier, Auteur ;
A. Kessler, Auteur
There are seven species of Phylloscopus warblers breeding sympatrically in Central Siberia. In general they are very similar in morphology and behaviour. Slight differences in morphology. however, are often interpreted as having arisen through a[...]
