Titre : | Ibis : The International Journal of Avian Science 150(2) - APR 2008 |
Type de document : | Bulletin |
Paru le : | 00/00/0000 |
Dépouillements
Article
Francis Zino, Auteur ;
Ruth Brown, Auteur ;
Manuel Biscoito, Auteur
The taxonomic status of petrels from the North East Atlantic has long been a matter of debate. Breeding colonies of petrels occurring on the islands of Madeira, Bugio and Cape Verde were originally thought to be outlying populations of the polyt[...]
Article
David C. Lee, Auteur ;
Stuart J. Marsden, Auteur
Although point transect distance sampling methods have become widely used in surveys of forest birds, there has been no attempt to tailor field methods to maximize the accuracy of abundance estimates by minimizing the effects of violations of th[...]
Article
Juan J. Negro, Auteur
Two independent cases of visual mimicry involving snake-eating eagles as mimics and more powerful bird-eating hawks as models are proposed. One pair of species is formed by the sympatric West African Serpent-eagle Dryotriorchis spectabilis and C[...]
Article
Norman Ratcliffe, Auteur ;
Tara Pelembe, Auteur ;
Richard White, Auteur
The Ascension Frigatebird is an island endemic whose conservation status was subject to confusion owing to difficulties in counting and misinterpretation of data. Accurate nest counts for this species are problematic owing to their extremely pro[...]
Article
Luis Cadahia, Auteur ;
Pascual López-López, Auteur ;
Vicente Urios, Auteur ;
Juan J. Negro, Auteur
Article
J. C. Coulson, Auteur ;
B. A. Coulson, Auteur
The degree of philopatry in two new Black-legged Kittiwake Rissa tridactyla colonies in northeast England was studied for 36 and 16 successive years, respectively. There was a tendency in both colonies for the number of recruits to the breeding [...]
Article
Michael P. Harris, Auteur ;
Mark Newell, Auteur ;
Francis Daunt, Auteur ;
John R. Speakman, Auteur ;
Sarah Wanless, Auteur
Article
Thibault Grava, Auteur ;
Nicolas Mathevon, Auteur ;
Emelyne Place, Auteur ;
Patrick Balluet, Auteur
The Eagle Owl Bubo bubo is cited in Annex I of the Birds Directive of the European Union. Europe's biggest owl is extremely sensitive to human presence and needs special conservation measures. The present paper aims to show that monitoring of in[...]
Article
Claude Novoa, Auteur ;
Aurélien Besnard, Auteur ;
Jean Francois Brenot, Auteur ;
Laurence N. Ellison, Auteur
Understanding the effects of climate on avian life history traits is essential if we wish to predict the demographic consequences of expected climatic changes. We investigated the influence of weather conditions on the reproductive success of Ro[...]
Article
Gunnar Gunnarsson, Auteur ;
Johan Elmberg, Auteur
Breeding success is a key element of animal population dynamics. In many taxa including birds, nest success, or the proportion of laid clutches that actually hatch, is mainly determined by predation. Previous research gives an inconsistent pictu[...]
Article
Arjun Amar, Auteur ;
Beatriz Arroyo, Auteur ;
Eric Meek, Auteur ;
Steve Redpath, Auteur ;
Helen Riley, Auteur
Article
Stephen N. Freeman, Auteur ;
Stuart E. Newson, Auteur
We discuss a log-linear model for series of regular bird counts taken at a number of survey sites. The model is parameterized in terms of annual growth rates rather than actual indices of abundance, as is more frequently done. This not only perm[...]
Article
Antoni Margalida, Auteur ;
José Antonio Donázar, Auteur ;
Javier Bustamante, Auteur ;
Francisco Jose Hernandez, Auteur ;
Marilo Romero-Pujante, Auteur
In this study we examined long-term variation in the selection of nesting cliffs for the recovering population of the Bearded Vulture Gypaetus barbatus inhabiting the Spanish Pyrenees. We focussed on variables indicating a high probability of cl[...]
Article
Shoji Hamao, Auteur
Bird song is critical to mate attraction. Because singing involves fitness costs, males that sing vigorous and complex songs are thought to be of high quality. Males of the Black-browed Reed Warbler Acrocephalus bistrigiceps sang actively when t[...]
Article
Amber E. Budden, Auteur ;
Jonathan Wright, Auteur
Nestling begging has the potential to provide parents with honest information about both short- and long-term nutritional needs, yet the importance of previous feeding experience remains largely untested in empirical studies. We examined the eff[...]
Article
Albrecht Manegold, Auteur
A passerine avifauna from the late Oligocene (c. 26-25 mya) of Germany was characterized by a high diversity of conspicuously small birds ranging in size from the smallest known Oscines to moderately small forms. The avifauna comprised both Osci[...]
Article
Jose A. Martinez, Auteur ;
Jose F. Calvo, Auteur ;
Jose E. Martinez, Auteur ;
Iñigo Zuberogoitia, Auteur ;
Jabi Zabala, Auteur ;
Stephen M. Redpath, Auteur
Bonelli's Eagle Hieraaetus fasciatus is one of the most endangered birds of prey in Europe. Despite mounting interest and research, several questions regarding the conservation implications of territory occupancy and site-dependent population re[...]
Article
Alice Cibois, Auteur ;
Jean-Claude Thibault, Auteur ;
Eric Pasquet, Auteur
In the Society archipelago (French Polynesia), Acrocephalus reed warblers are known only from four islands: Tahiti, Mo'orea, Huahine and Raiatea. All populations are now extinct except on Tahiti. Our knowledge of these birds is based on a small [...]
Article
Vicente Garcia-Navas, Auteur ;
Luis Arroyo, Auteur ;
Juan José Sanz, Auteur ;
Mario Diaz, Auteur
Avian life-history studies are often conducted on populations nesting in nestboxes. However, the type of nestbox used is a potentially confounding variable, as each model shows specific characteristics. In recent decades, a new commercial model [...]
Article
Heiko Schmaljohann, Auteur ;
Felix Liechti, Auteur ;
Erich Baechler, Auteur ;
Thomas Steuri, Auteur ;
Bruno Bruderer, Auteur
Besides the scientific interest in the quantification of bird migration, there is an increasing need to quantify bird movements for the assessment of bird collision risk with artificial structures. In many environmental impact studies, the radar[...]
Article
Adrian Surmacki, Auteur
The plumage coloration of wild birds often changes during the breeding season. One of the possible reasons for this is that sunlight, and particularly ultraviolet (UV) wavelengths, degrades the pigments responsible for plumage coloration. It has[...]