| Titre : | Ibis : The International Journal of Avian Science 149(4) - OCT 2007 |
| Type de document : | Bulletin |
| Paru le : | 01/10/2007 |
Dépouillements
Article
S. Kleindorfer, Auteur
This study examines the ecology of clutch size variation between two contiguous populations of Small Ground Finch Geospiza fuliginosa that breed in geographically distinct habitats (lowlands, highlands) on Santa Cruz Island of the Galapagos Arch[...]
Article
Jeroen Reneerkens, Auteur ;
Juliana B. Almeida, Auteur ;
David B. Lank, Auteur ;
Joop Jukema, Auteur ;
Richard B. Lanctot, Auteur ;
R. I. Guy Morrison, Auteur ;
W. Irene C. Rijpstra, Auteur ;
Douglas Schamel, Auteur ;
Hans Schekkerman, Auteur ;
Jaap S. Sinninghe Damste, Auteur ;
Pavel S. Tomkovich, Auteur ;
Diane M. Tracy, Auteur ;
Ingrid Tulp, Auteur ;
Theunis Piersma, Auteur
Previous studies have shown that preen wax composition in some sandpipers shifts from the usual monoesters to diesters during the breeding season, possibly to reduce the ability of mammalian predators to find nests using olfactory cues. To inves[...]
Article
Darryl B. Edwards, Auteur ;
Mark R. Forbes, Auteur
Early male arrival at breeding sites, or protandry, is thought to have evolved from intrasexual competition among males for access to mates or breeding resources. Males of polygynous species tend to be larger than females and have exaggerated se[...]
Article
Paul F. Donald, Auteur ;
Sabine Hille, Auteur ;
M. de L. Brooke, Auteur ;
Roy Taylor, Auteur ;
Colin E. Wells, Auteur ;
Mark Bolton, Auteur ;
Tim Marlow, Auteur
Article
Erich Bachler, Auteur ;
Felix Liechti, Auteur
Raw count data are often used to estimate bird population densities. However, such data do not consider detection probability. As an alternative, methods that model detection probability such as distance-sampling have been proposed. However, sta[...]
Article
Karel Weidinger, Auteur ;
Miroslav Král, Auteur
Long-distance migrants may respond to climate change in breeding, wintering or staging area by changing their phenology. The geographical variation in such responses (e.g. coastal vs. continental Europe) and the relative importance of climate at[...]
Article
Paul F. Donald, Auteur
Offspring sex ratios in wild bird populations, and the extent to which they vary from the equality expected by random genotypic sex determination, have received much recent attention. Adult sex ratios (ASRs) in wild birds, on the other hand, rem[...]
Article
Andrea Raya Rey, Auteur ;
Phil Trathan, Auteur ;
Adrián Schiavini, Auteur
Understanding the relationship between reproductive performance and food availability requires knowledge about many different variables, including such factors as the length of incubation shifts, provisioning rates and patterns, as well as how v[...]
Article
Carlos Daniel Cadena, Auteur ;
Bernabe Lopez-Lanus, Auteur ;
John M. Bates, Auteur ;
Niels Krabbe, Auteur ;
Nathan H. Rice, Auteur ;
F. Gary Stiles, Auteur ;
Juan Diego Palacio, Auteur ;
Paul Salaman, Auteur
Based on analyses of variation in plumage, morphometrics, vocalizations, and mitochondrial and nuclear DNA sequences, we document the occurrence of interspecific hybridization between a Chestnut-naped Antpitta Grallaria nuchalis and a Chestnut-c[...]
Article
Beatriz E. Arroyo, Auteur ;
Vincent Bretagnolle, Auteur ;
Alain Leroux, Auteur
We evaluated the direct and interactive effects of food and age on reproduction in the Montagu's Harrier Circus pygargus, to test whether variation in food supply was likely to affect age-specific breeding probability or success. Younger females[...]
Article
Mohammad Kaboli, Auteur ;
Mansour Aliabadian, Auteur ;
Alban Guillaumet, Auteur ;
Cees S. Roselaar, Auteur ;
Roger Prodon, Auteur
We used measurements of museum skins to assess morphological differences between the 22 currently recognized species of wheatear and to identify correlations between morphological features, behavioural traits and degrees of sympatry between spec[...]
Article
George Sangster, Auteur ;
J. Martin Collinson, Auteur ;
Alan G. Knox, Auteur ;
David T. Parkin, Auteur ;
Lars Svensson, Auteur
Article
Bruno A. Walther, Auteur ;
Norbert Schaeffer, Auteur ;
Adriaan van Niekerk, Auteur ;
Wilfried Thuiller, Auteur ;
Carsten Rahbek, Auteur ;
Steven L. Chown, Auteur
The Aquatic Warbler Acrocephalus paludicola is one of the most threatened Western Palearctic passerine species, classified as globally Vulnerable. With its breeding grounds relatively secure, a clear need remains for the monitoring and protectio[...]
Article
Sabrina S. Taylor, Auteur ;
Ian G. Jamieson, Auteur
Successful founders of new populations may represent a non-random sample of potential founding individuals. Using a recent Saddleback Philesturnus carunculatus translocation as a natural experiment, we related morphology, parasite load and genet[...]
Article
Gerald Mayr, Auteur ;
Charles W. Knopf, Auteur
A new species of the charadriiform taxon Turnipax Mayr, 2000 is described from the Lower Oligocene fossil site Frauenweiler in southern Germany. The postcranial skeleton assigned to Turnipax oechslerorum sp. nov. is very well preserved and allow[...]
Article
Liesbeth de Neve, Auteur ;
Juan J. Soler, Auteur ;
Magdalena Ruiz-Rodríguez, Auteur ;
David Martín-Gálvez, Auteur ;
Tomas Perez-Contreras, Auteur ;
Manuel Soler, Auteur
Parasite pressure and nutrition are two of the most important factors affecting the trade-off between nestling growth and immune development. During development, energy and nutrients are often limited, and nestlings should only dedicate differen[...]
Article
Philip Warren, Auteur ;
David Baines, Auteur
Radio-transmitters were fitted on 146 juvenile Red Grouse Lagopus lagopus scoticus (116 hens, 30 cocks) to study the timing, frequency and distances of dispersal on managed grouse moors in northern England between 1999 and 2002. A third of the r[...]
Article
Graham R. Martin, Auteur ;
Raymond Mcneil, Auteur ;
Luz Marina Rojas, Auteur
In birds, the position and extent of the region of binocular vision appears to be determined primarily by feeding ecology. Of prime importance is the degree to which vision is used for the precise control of bill position when foraging. Skimmers[...]
Article
Steven Kragten, Auteur ;
Geert R. De Snoo, Auteur
Increasing agricultural intensification has put farmland bird populations under great stress. Although organically managed farms tend to have higher densities of farmland birds than conventionally managed holdings, differences in crop management[...]
