| Titre : | Journal of Ornithology 151(4) - OCT 2010 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Gal Ribak, Auteur
Buoyancy has a substantial contribution to the total mechanical cost of diving in waterbirds. Most of the techniques currently employed to estimate buoyancy are based on measuring the volume of carcasses or forcibly submerged birds using the wat[...]
Article
Jaroslav Kolecek, Auteur ;
Jiri Reif, Auteur ;
Karel Šťastný, Auteur ;
Vladimir Bejcek, Auteur
European birds have been significantly affected by dramatic environmental changes during the last decades. The effects of these changes on species richness and distribution in particular countries are still poorly understood because of a lack of[...]
Article
Raphaël Arlettaz, Auteur ;
Michael Schaad, Auteur ;
Thomas S. Reichlin, Auteur ;
Michael Schaub, Auteur
Preserving peripheral populations is a key conservation issue because of the adaptive potential to environmental change they provide for the species as a whole. Yet, peripheral populations are often small and isolated, i.e. more vulnerable to st[...]
Article
Article
Juan G. Navedo, Auteur ;
German Orizaola, Auteur ;
José A. Masero, Auteur ;
Otto Overdijk, Auteur ;
Juan M. Sánchez-Guzmán, Auteur
Long-distance migration is widespread among birds, connecting breeding and wintering areas through a set of stopover localities where individuals refuel and/or rest. The extent of the stopover is critical in determining the migratory strategy of[...]
Article
Guillaume Peron, Auteur ;
Jean-Dominique Lebreton, Auteur ;
Pierre-André Crochet, Auteur
We studied the effects of colony size on individual reproductive success in a multi-site population of Black-headed Gulls Chroicocephalus ridibundus where colony size ranged from 10 to 5,000 pairs. By focusing on family size, the number of chick[...]
Article
Andre A. Dhondt, Auteur
Article
H. Hoi, Auteur ;
J. Kristofik, Auteur ;
A. Darolova, Auteur ;
C. Hoi, Auteur
Ectoparasites have often been shown to have detrimental effects on their host. Not much is known, however, about determinants of infestation, e.g. the question of which factors affect distribution and occurrence of parasites on different host sp[...]
Article
Valerie Coudrain, Auteur ;
Raphaël Arlettaz, Auteur ;
Michael Schaub, Auteur
In recent decades, farmland bird populations have declined strongly as a consequence of agriculture intensification. Birds may have lost breeding sites, food supply or other crucial resources, with the role of multiple factors often remaining un[...]
Article
Veronica L. D'Amico, Auteur ;
Allan J. Baker, Auteur
The Red Knot (Calidris canutus rufa) is a Nearctic migrant shorebird that breeds in the Canadian Arctic and spends the winter season in coastal sites in South America. A rare case of a blood protozoan was found by molecular analyses from an adul[...]
Article
Claire V. Lindsay, Auteur ;
Colleen T. Downs, Auteur ;
Mark Brown, Auteur
The distribution range of Amethyst Sunbirds (Chalcomitra amethystina) within southern Africa includes an altitudinal gradient from the Drakensberg to the coast of KwaZulu-Natal. We expected that, over this altitudinal gradient, Amethyst Sunbirds[...]
Article
Miguel Â. Marini, Auteur ;
Morgane Barbet-Massin, Auteur ;
Leonardo E. Lopes, Auteur ;
Frédéric Jiguet, Auteur
Species distribution models (SDMs) yield reliable and needed predictions to identify regions that have similar environmental conditions and were used here to predict potential ranges of rare species to identify new localities were they might occ[...]
Article
Michal Vinkler, Auteur ;
Jan Schnitzer, Auteur ;
Pavel Munclinger, Auteur ;
Jan Votypka, Auteur ;
Tomáš Albrecht, Auteur
Haematological methods are widely utilised among avian ecologists as a means for individual health assessment. However, the technical simplicity of some of the tests may easily lead to oversimplification of the evaluation. Here, we show in the S[...]
Article
Anja Gladbach, Auteur ;
David Joachim Gladbach, Auteur ;
Petra Quillfeldt, Auteur
Several studies have shown that waterfowl females in good condition lay larger clutches and start egg-laying earlier in a breeding season. However, most of these studies lack corresponding data on individual condition and timing of breeding in d[...]
Article
Maria Dolores G. Lopez de Hierro, Auteur ;
Liesbeth de Neve, Auteur
One of the hypotheses to explain egg colour variation in birds lays in the context of sexual selection, where egg colour may signal the female's physical condition and antioxidant capacity. We tested one of the assumptions following from this hy[...]
Article
Motti Charter, Auteur ;
Ido Izhaki, Auteur ;
Yossi Leshem, Auteur
The effects of competition and risk of predation on secondary cavity breeders were examined between the 2008 and 2009 breeding seasons using an experimental design manipulating two nest entrance sizes (large entrances allowed Barn Owls (Tyto alb[...]
Article
Rafal Martyka, Auteur ;
Joanna Rutkowska, Auteur ;
Anna Dybek-Karpiuk, Auteur ;
Mariusz Cichoń, Auteur ;
Kazimierz Walasz, Auteur
Recently, a number of studies have shown that female birds are able to control the sex of their progeny at the stage of the gamete. There is also some evidence that females adjust their investment in offspring depending on the sex of the embryo [...]
Article
James J. H. St Clair, Auteur ;
Philipp Herrmann, Auteur ;
Robin W. Woods, Auteur ;
Tamás Székely, Auteur
The relative contributions of males and females to incubation, and the diel schedules by which incubation is shared, are important breeding system traits. We used infra-red sensitive cameras to record incubation patterns at 13 nests of the Two-b[...]
Article
Jose Luis Romero, Auteur ;
Sabine Muecke, Auteur ;
Julio Perez, Auteur
A cooperative breeding case was found in Lesser Spotted Woodpecker (LSW) in which a male and three different females were involved. The contributions of each member of the cooperative breeding team were quantified during nest excavation and incu[...]
Article
Evonnildo C. Goncalves, Auteur ;
Stephen F. Ferrari, Auteur ;
Tiberio Cesar T. Burlamaqui, Auteur ;
Leonardo Miranda, Auteur ;
Marcelo S. Santos, Auteur ;
Artur Silva, Auteur ;
Maria Paula C. Schneider, Auteur
The possible origin of the Scarlet ibis population of Cubato in southern Brazil, and its levels of genetic diversity and differentiation in relation to populations from the country's northern coast were investigated through the sequences of 980 [...]
Article
Wangworn Sankamethawee, Auteur ;
Britta Denise Hardesty, Auteur ;
George A. Gale, Auteur
While natal dispersal can have a significant impact on population dynamics, it is typically difficult to quantify. We investigated timing of natal dispersal of the cooperatively breeding Puff-throated Bulbul Alophoixus pallidus in a tropical eve[...]
Article
David L. Leonard, Auteur ;
Julie A. Heath, Auteur
Links between morphology and foraging strategies have been well established for many vertebrate groups. Foraging strategies of Melanerpes woodpeckers are especially variable, with at least six species being proficient flycatchers; the remainder [...]
Article
Who-Seung Lee, Auteur ;
Young-Soo Kwon, Auteur ;
Jeong-Chil Yoo, Auteur
A long-standing hypothesis posits that, for species with exposed nests, a close match between the colour of the eggs and that of the nest in which they are laid should enhance egg survival, but this has rarely been tested in a rigorous manner. H[...]
Article
Clément Calenge, Auteur ;
Matthieu Guillemain, Auteur ;
Michel Gauthier-Clerc, Auteur ;
Géraldine Simon, Auteur
We use a new method called "product kernel estimator" to explore the spatial and temporal distribution of 9,114 recoveries of Teal (Anas crecca) ringed in Camargue, southern France, and recovered over the whole of Europe. This method allows expl[...]
Article
Andrea Raya Rey, Auteur ;
Charles-Andre Bost, Auteur ;
Adrián Schiavini, Auteur ;
Klemens Puetz, Auteur
This study investigates the movements of Magellanic Penguins Spheniscus magellanicus breeding on Isla Martillo during the early chick-rearing period. Foraging paths were reconstructed using GPS loggers that registered the penguins' geographic po[...]
Article
Manuel A. Gonzalez, Auteur ;
Pedro P. Olea, Auteur ;
Luis Robles, Auteur ;
Vicente Ena, Auteur
We described an extension of the known distribution range of the Cantabrian Capercaillie Tetrao urogallus cantabricus into an atypical area and habitat for the species. Nine Capercaillie leks and 14 cocks were registered in Mediterranean Quercus[...]
