| Titre : | Ibis : The International Journal of Avian Science 159(2) - avril 1, 2017 |
| Type de document : | Bulletin |
| Paru le : | 23/03/2017 |
Dépouillements
Article
Tómas Grétar Gunnarsson, Auteur ;
Lilja Jóhannesdóttir, Auteur ;
José A. Alves, Auteur ;
Böðvar Þórisson, Auteur ;
Jennifer A. Gill, Auteur
Key demographic parameters often show substantial annual variation that can have important consequences for rates of population growth. Since 2011 we have conducted annual estimates of the productivity of Icelandic Black-tailed Godwits Limosa li[...]
Article
Michal Podhrázský, Auteur ;
Petr Musil, Auteur ;
Zuzana Musilová, Auteur ;
Jan Zouhar, Auteur ;
Matyáš Adam, Auteur ;
Jaroslav Závora, Auteur ;
Karel Hudec, Auteur
Global climate change can cause pronounced changes in speciesʼ migratory behaviour. Numerous recent studies have demonstrated climate-driven changes in migration distance and spring arrival date in waterbirds, but detailed studies based on long-[...]
Article
Bianca P. Vieira, Auteur ;
Robert W. Furness, Auteur ;
Ruedi G. Nager, Auteur
Methods to obtain moult data from wild birds have not changed much over the last century and most studies still depend on checking museum specimens or capturing birds. Here we assess the applicability of systematic field photography for detectin[...]
Article
Rimgaudas Treinys, Auteur ;
Uģis Bergmanis, Auteur ;
Ülo Väli, Auteur
We assessed whether populations of the migratory, philopatric, territorial Lesser Spotted Eagle Clanga pomarina are regulated through territoriality and density-dependent reproduction rates. In the north-western part of the distribution to the e[...]
Article
Barry J. McMahon, Auteur ;
Gordon Purvis, Auteur ;
Helen Sheridan, Auteur ;
Gavin M. Siriwardena, Auteur ;
Andrew C. Parnell, Auteur
The statistical modelling of count data permeates the discipline of ecology. Such data often exhibit overdispersion compared with a standard Poisson distribution, so that the variance of the counts is greater than that of the mean. Whereas model[...]
Article
Mylene Dutour, Auteur ;
Jean-Paul Lena, Auteur ;
Thierry Lengagne, Auteur
Mobbing behaviour against predators is well documented but less is known about the factors influencing variation in behavioural response between prey species. We conducted a series of playback experiments to examine how the mobbing responses of [...]
Article
Christine Groom, Auteur ;
Nicole E. White, Auteur ;
Nicola Mitchell, Auteur ;
J. Dale Roberts, Auteur ;
Peter Mawson, Auteur
The conservation of highly mobile species presents challenges to managers for assessment of threats to survival, given the difficulties in locating and observing such species. Here we evaluate satellite telemetry, DNA faecal metabarcoding and tr[...]
Article
Suvi Ponnikas, Auteur ;
Tuomo Ollila, Auteur ;
Laura Kvist, Auteur
Dispersal is a process that increases genetic diversity and genetic connectivity of populations. We studied the turnover rate of breeding adults and genetic population structure to estimate dispersal in Peregrine Falcons in Finland. We used rela[...]
Article
Robert J. Burnside, Auteur ;
Nigel J. Collar, Auteur ;
Paul M. Dolman, Auteur
For migratory species, the success of population reintroduction or reinforcement through captive-bred released individuals depends on survivors undertaking appropriate migrations. We assess whether captive-bred Asian Houbara Chlamydotis macqueen[...]
Article
Anouk Spelt, Auteur ;
Lorien Pichegru, Auteur
Biased offspring sex ratio is relatively rare in birds and sex allocation can vary with environmental conditions, with the larger and more costly sex, which can be either the male or female depending on species, favoured during high food availab[...]
Article
Nocturnal migrants do not incur higher collision risk at wind turbines than diurnally active species
Jorg Welcker, Auteur ;
Monique Liesenjohann, Auteur ;
Jan Blew, Auteur ;
Georg Nehls, Auteur ;
Thomas Grünkorn, Auteur
Nocturnally migrating birds, particularly passerines, are known to be vulnerable to collision with man-made structures such as buildings, towers or offshore platforms, yet information with respect to wind farms is ambiguous. We recorded bird fli[...]
Article
Tim R. Birkhead, Auteur ;
Jamie E. Thompson, Auteur ;
Duncan Jackson, Auteur ;
John D. Biggins, Auteur
The adaptive significance of avian egg shape in birds is poorly understood. The pyriform (pear-like) shape of the Common Guillemot's Uria aalge egg has long been considered to be an adaptation to prevent eggs rolling off the bare cliff ledges on[...]
Article
Darío Chamorro, Auteur ;
Jesús Olivero, Auteur ;
Raimundo Real, Auteur ;
Antonio-Roman Munoz, Auteur
Winters have become warmer under the impact of climate change, which has modified the phenology as well as the distribution ranges of birds. The African Long-legged Buzzard Buteo rufinus cirtensis has recently colonized Europe via the Strait of [...]
Article
Christian Heuck, Auteur ;
Christof Herrmann, Auteur ;
Dana G. Schabo, Auteur ;
Roland Brandl, Auteur ;
Jörg Albrecht, Auteur
Understanding the mechanisms that shape density-dependent processes and population dynamics is often essential for species conservation. Two key mechanisms of density-dependent reductions in reproductive performance are a limited access to forag[...]
Article
Michael J. McGrady, Auteur ;
James E. Hines, Auteur ;
Chris J. Rollie, Auteur ;
George D. Smith, Auteur ;
Elise R. Morton, Auteur ;
Jennifer F. Moore, Auteur ;
Richard M. Mearns, Auteur ;
Ian Newton, Auteur ;
Oscar E. Murillo-García, Auteur ;
Madan K. Oli, Auteur
Organochlorine pesticides disrupted reproduction and killed many raptorial birds, and contributed to population declines during the 1940s to 1970s. We sought to discern whether and to what extent territory occupancy and breeding success changed [...]
Article
Frank Cézilly, Auteur ;
Tobias Salathé, Auteur
Article
Steven J. Portugal, Auteur ;
Campbell P. Murn, Auteur ;
Graham R. Martin, Auteur
The visual fields of the Aegypiinae vultures have been shown to be adapted primarily to meet two key perceptual challenges of their obligate carrion-feeding behaviour: scanning the ground and preventing the sun's image falling upon the retina. H[...]
Article
Steven J. Portugal, Auteur ;
Laura Sivess, Auteur ;
Graham R. Martin, Auteur ;
Patrick J. Butler, Auteur ;
Craig R. White, Auteur
Dominant individuals within animal groups will frequently place themselves in the most beneficial position for maximal protection against predation. Higher perches are generally associated with reduced predation risk in birds, so we predicted th[...]
Article
Alex D. Ball, Auteur ;
René E. van Dijk, Auteur ;
Penn Lloyd, Auteur ;
Ákos Pogány, Auteur ;
Deborah A. Dawson, Auteur ;
Steve Dorus, Auteur ;
Rauri C. K. Bowie, Auteur ;
Terry Burke, Auteur ;
Tamás Székely, Auteur
In most passerine birds, individuals attempt to maximize their fitness by providing parental care while also mating outside their pair bond. A sex-specific trade-off between these two behaviours is predicted to occur, as the fitness benefits of [...]
Article
Nasrin Kayvanfar, Auteur ;
Mansour Aliabadian, Auteur ;
Xiaoju Niu, Auteur ;
Zhengwang Zhang, Auteur ;
Yang Liu, Auteur
The Common Pheasant Phasianus colchicus is widely distributed in temperate to subtropical regions of the Palaearctic realm. Populations of Common Pheasant have been classified into five subspecies groups based on morphological variations in male[...]
Article
Charles M. Kahindo, Auteur ;
John M. Bates, Auteur ;
Rauri C. K. Bowie, Auteur
The endangered warbler Bradypterus graueri is endemic to the Albertine Rift, where it is restricted to montane swamps above 1900 m across the region. We studied genetic structure among six populations sampled across the species' distribution in [...]
Article
Maricel Graña Grilli, Auteur ;
Yves Cherel, Auteur
Seabirds are mostly thought to moult during the inter-breeding period and the isotopic values of their feathers are often therefore assumed to relate to their assimilated diet during such periods. We observed Brown Skuas Stercorarius antarcticus[...]
