| Titre : | Ibis : The International Journal of Avian Science 149(2) - APR 2007 |
| Type de document : | Bulletin |
| Paru le : | 01/04/2007 |
Dépouillements
Article
Joaquon Ortego, Auteur ;
Francisco Espada, Auteur
In this study we assessed whether local habitat features and host population density influenced disease risk in Eagle Owl Bubo bubo fledglings. Measures of immune defence (concentrations of circulating white blood cells), prevalence of three par[...]
Article
Article
B. Dalsgaard, Auteur ;
G. M. Hilton, Auteur ;
G. A. L. Gray, Auteur ;
L. Aymer, Auteur ;
J. Boatswain, Auteur ;
J. Daley, Auteur ;
C. Fenton, Auteur ;
J. Martin, Auteur ;
L. Martin, Auteur ;
P. Murrain, Auteur ;
W. J. Arendt, Auteur ;
D. W. Gibbons, Auteur ;
J. M. Olesen, Auteur
Volcanic eruptions are an important and natural source of catastrophic disturbance to ecological communities. However, opportunities to study them are relatively rare. Here we report on the effects of the eruption of the Soufriere Hills volcano [...]
Article
Lynn B. Martin, Auteur ;
Monica I. Pless, Auteur ;
Martin C. Wikelski, Auteur
Article
S. Manu, Auteur ;
W. Peach, Auteur ;
W. Cresswell, Auteur
Almost nothing is known of the effects of forest fragmentation on bird diversity within the heavily degraded and fragmented forest remnants in West Africa. We examined the effects of edge, fragment size and isolation on bird species richness in [...]
Article
Cezary Mitrus, Auteur ;
Wieslaw Walankiewicz, Auteur ;
Dorota Czeszczewik, Auteur
Article
Nigel Cleere, Auteur ;
Andrew W. Kratter, Auteur ;
David W. Steadman, Auteur ;
Michael J. Braun, Auteur ;
Christopher J. Huddleston, Auteur ;
Christopher E. Filardi, Auteur ;
Guy Dutson, Auteur
The frogmouth taxon occurring on the Solomon Islands has been known as Podargus ocellatus inexpectatus, a subspecies endemic to four islands in the Solomon Islands of a species that also inhabits New Guinea and Australia. Our morphological, oste[...]
Article
John Wilson, Auteur ;
Ian R. Hartley, Auteur
Article
Mark Bolton, Auteur
A number of lines of evidence suggest that temporally segregated sympatric populations of Madeiran Storm-petrels Oceanodroma castro breeding in the Azores are reproductively isolated and morphologically and genetically distinct from each other. [...]
Article
Diego Villanua, Auteur ;
Fabián Casas, Auteur ;
Javier Viñuela, Auteur ;
Christian Gortazar, Auteur ;
Eladio Garcia De La Morena, Auteur ;
Manuel Morales, Auteur
Article
Judith Morales, Auteur ;
Juan Moreno, Auteur ;
Santiago Merino, Auteur ;
Juan J. Sanz, Auteur ;
Gustavo Tomás, Auteur ;
Elena Arriero, Auteur ;
Elisa Lobato, Auteur ;
Josue Martonez-De La Puente, Auteur
Female ornamentation has received little attention in studies of sexual selection. Traditionally, female ornaments have been explained as a genetically correlated response to selection in males. However, recent findings suggest that female ornam[...]
Article
Eduardo J. Belda, Auteur ;
Emilio Barba, Auteur ;
Juan S. Monrós, Auteur
In their winter quarters, migrant birds may either remain within a small area (resident strategy) or move frequently over a large area looking for locally abundant food (transient strategy). It has been suggested that both strategies could simul[...]
Article
Valentin Amrhein, Auteur ;
Hansjoerg P. Kunc, Auteur ;
Rouven Schmidt, Auteur ;
Marc Naguib, Auteur
In many bird species the sex ratio of adults is male-biased, which is likely to have consequences for the ecology as well as for the conservation of a species. For example, when some males remain unpaired in a population, there should be strong [...]
Article
Volker Salewski, Auteur ;
Michael Schaub, Auteur
Birds on migration spend much more time on stopover sites to refuel for the next migration step than aloft, but empirical data on stopover duration are rare, especially for Palearctic trans-Sahara migrants whilst crossing the desert. Previous st[...]
Article
Innes M. W. Sim, Auteur ;
Ian J. Burfield, Auteur ;
Murray C. Grant, Auteur ;
James W. Pearce-Higgins, Auteur ;
M. de L. Brooke, Auteur
Ring Ouzel Turdus torquatus breeding site occupancy in the Moorfoot Hills, southeast Scotland, was determined during the periods 1952-85 and 1998-2000, and sites were classed as either occupied or deserted during the latter period. Site occupanc[...]
Article
Gustavo J. Fernández, Auteur ;
Juan C. Reboreda, Auteur
The breeding system of the Greater Rhea Rhea americana is almost unique among birds as it combines harem polygyny and sequential polyandry, with communal egg-laying and uniparental male care. In this species, large communal clutches (more than 3[...]
Article
Karin Schiegg, Auteur ;
Marc Eger, Auteur ;
Gilberto Pasinelli, Auteur
Predation is a major cause of nest failure in many bird species. High levels of nest loss may be a consequence of habitat fragmentation, leading to increased amounts of edge habitat. Yet the evidence for generally high nest predation rates along[...]
Article
Michel Gauthier-Clerc, Auteur ;
C. Lebarbenchon, Auteur ;
F. Thomas, Auteur
Wild birds, particularly waterfowl, are a key element of the viral ecology of avian influenza. Highly pathogenic avian influenza (HPAI) virus, subtype H5N1, was first detected in poultry in November 1996 in southeast China, where it originated. [...]
Article
Vic W. Smith, Auteur
Article
Christopher Hofmann, Auteur ;
Wen-Sui Lo, Auteur ;
Cheng-Te Yao, Auteur ;
Shou-Hsien Li, Auteur
Several recent studies have found instances of cryptic sexual dichromatism within avian taxa. Although this dichromatism has been found in plumage produced through a variety of proximate mechanisms, little is known about how dichromatism varies [...]
Article
Joaquon Ortego, Auteur ;
Francisco Espada, Auteur
In this study we assessed whether local habitat features and host population density influenced disease risk in Eagle Owl Bubo bubo fledglings. Measures of immune defence (concentrations of circulating white blood cells), prevalence of three par[...]
Article
Robert A. Robinson, Auteur ;
Stephen R. Baillie, Auteur ;
Humphrey Q. P. Crick, Auteur
Understanding demographic processes will be essential to construct robust models of population responses to climate change. We show that survival is related to the strength of the North Atlantic Oscillation in five out of ten British resident pa[...]
Article
Article
Jonathan S. Walker, Auteur
Over 20 months I collected data on the diet composition and fruit availability for 23 frugivorous bird species (pigeons, parrots, hornbills and passerines) in two lowland rain forests on Sulawesi, Indonesia. Using these data I determined species[...]
Article
Mark L. Mallory, Auteur ;
J. Daniel McLaughlin, Auteur ;
Mark R. Forbes, Auteur
We studied the relationship between contaminant concentrations in livers, endohelminth prevalence and physiological indices of chronic stress (spleen size, heterophil/lymphocyte ratios) in Northern Fulmars Fulmarus glacialis collected during the[...]
Article
Deepa Senapathi, Auteur ;
Ioannis N. Vogiatzakis, Auteur ;
Panchapakesan Jeganathan, Auteur ;
Jennifer A. Gill, Auteur ;
Rhys E. Green, Auteur ;
Christopher G. R. Bowden, Auteur ;
Asad R. Rahmani, Auteur ;
Debbie Pain, Auteur ;
Ken Norris, Auteur
Jerdon's Courser Rhinoptilus bitorquatus is one of the most endangered and least understood birds in the world. It is endemic to scrub habitats in southeast India which have been lost and degraded because of human land use. We used satellite ima[...]
Article
Graeme M. Buchanan, Auteur ;
Murray C. Grant, Auteur ;
Roy A. Sanderson, Auteur ;
James W. Pearce-Higgins, Auteur
Article
Mark Brown, Auteur ;
Michael J. Lawes, Auteur
Colonial nesters are potentially susceptible to brood parasitism because they present an aggregated source of accessible nests to brood parasites. However, colonial breeding may confer fitness advantages on potential host species that outweigh t[...]
Article
Article
J. M. M. Ekstrom, Auteur ;
T. Burke, Auteur ;
L. Randrianaina, Auteur ;
T. R. Birkhead, Auteur
We describe the unusual mating system of the Greater Vasa Parrot Caracopsis vasa. The dull black plumage of males and females is similar but females are significantly larger than males. Females are promiscuous and copulated with at least five di[...]
