| Titre : | Ibis : The International Journal of Avian Science 149(3) - JUL 2007 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Stephen C. Votier, Auteur ;
Martyn Kennedy, Auteur ;
Stuart Bearhop, Auteur ;
Richard G. Newell, Auteur ;
Kate Griffiths, Auteur ;
Helen Whitaker, Auteur ;
Markus S. Ritz, Auteur ;
Robert W. Furness, Auteur
Article
Les G. Underhill, Auteur ;
Jan H. Hofmeyr, Auteur
Rooikrans Acacia cyclops is an invasive plant species in the coastal region of South Africa, especially the Fynbos Biome. It is endemic to southwestern Australia. Seeds are bird-dispersed, mostly by frugivores and granivores. We report that at o[...]
Article
Ross Mcgregor, Auteur ;
Mark J. Whittingham, Auteur ;
Will Cresswell, Auteur
Article
I. Newton, Auteur
A major perceived cost of migration in birds is the associated mortality. This mortality has proved difficult to measure and separate from mortality during stationary periods of the annual cycle. This paper reviews some major recorded mortality [...]
Article
Jennifer A. Hancock, Auteur ;
Nancy J. Stevens, Auteur ;
Audrone R. Biknevicius, Auteur
Whereas humans and certain birds experience an abrupt change in locomotor dynamics when shifting from walks to runs, a smooth walk-run transition characterizes many ground-dwelling birds. This study defines the biomechanical distinction between [...]
Article
Stephen N. Freeman, Auteur ;
Robert A. Robinson, Auteur ;
Jacquie A. Clark, Auteur ;
Bridget M. Griffin, Auteur ;
Sue Y. Adams, Auteur
Understanding demography is critical for understanding the causes underlying population declines, and for initiating and monitoring policies to reverse them. A method of fitting demographic models directly to avian count data recorded at a sampl[...]
Article
Ben J. Koks, Auteur ;
Christiane Trierweiler, Auteur ;
Erik G. Visser, Auteur ;
Cor Dijkstra, Auteur ;
Jan Komdeur, Auteur
Loss and degradation of habitat threatens many bird populations. Recent rural land-use changes in the Netherlands have led to a shift in habitat use by breeding Montagu's Harriers Circus pygargus. Since the 1990s, unprecedented numbers of this s[...]
Article
Camila C. Ribas, Auteur ;
Erika S. Tavares, Auteur ;
Celina Yoshihara, Auteur ;
Cristina Y. Miyaki, Auteur
The Yellow-headed Parrot (Amazona ochrocephala) has a broad Neotropical distribution, ranging from Mexico to the Amazon Basin, and a history of complex taxonomy and controversial species limits. Recent molecular analyses have started to clarify [...]
Article
Pierre A. Pistorius, Auteur ;
Arne Follestad, Auteur ;
Leif Nilsson, Auteur ;
Frances E. Taylor, Auteur
Greylag Geese Anser anser have been neck-banded on an annual basis in Scania, southern Sweden since 1984 and in Norway since 1986 as part of a Nordic Greylag project. This has yielded a large database of resightings, which we used here to estima[...]
Article
Jeanne Fair, Auteur ;
Shayna Whitaker, Auteur ;
Brandon Pearson, Auteur
The validity of the haematocrit or packed cell volume as an indicator of condition in wild birds has recently been questioned. We reviewed over 300 published papers on haematocrit values for wild birds. These studies show that changes in haemato[...]
Article
René van Dijk, Auteur ;
Istvan Szentirmai, Auteur ;
Jan Komdeur, Auteur ;
Tamás Székely, Auteur
Do the two parents at a nest make simultaneous decisions whether to care for their offspring or to desert? If a single parent is sufficient for rearing young, one parent (typically, the male) may desert and reproduce with a new mate within the s[...]
Article
Patrik Byholm, Auteur ;
Ari Nikula, Auteur
Habitat composition is an important factor influencing nesting failure probability in birds. However, although various habitat effects such as fragmentation and edge density are known to have clear negative effects on the breeding success of pas[...]
Article
Diego T. Tuero, Auteur ;
Vanina D. Fiorini, Auteur ;
Juan C. Reboreda, Auteur
Avian brood parasites, including cuckoos and cowbirds, have multiple negative effects on their hosts. We analysed the effects of Shiny Cowbird Molothrus bonariensis parasitism on different components (e.g. egg losses, hatching success, chick sur[...]
Article
Article
Simon Gillings, Auteur ;
Robert J. Fuller, Auteur ;
William J. Sutherland, Auteur
Eurasian Golden Plovers Pluvialis apricaria and Northern Lapwings Vanellus vanellus winter in large numbers on Britain's farmland. Previous studies in mixed farming areas showed pronounced preferences for permanent pasture, but increasing number[...]
Article
Odette E. Curtis, Auteur ;
Philip A. R. Hockey, Auteur ;
Ann Koeslag, Auteur
We studied a population of Black Sparrowhawks Accipiter melanoleucus that has recently colonized the Cape Peninsula, South Africa. Black Sparrowhawks are winter breeders: over most of their range winters are dry, but the Cape Peninsula has a Med[...]
Article
Article
Jeremy Bird, Auteur ;
James Gilroy, Auteur
Article
Michela Bose, Auteur ;
Francois Sarrazin, Auteur
Intraspecific competitive behaviours were studied in a reintroduced population of Griffon Vultures Gyps fulvus in order to describe the pattern of competition between ages and sexes, assess the effect of reintroduction on competitive behaviour, [...]
Article
Gareth J. Dyke, Auteur ;
Robert L. Nudds, Auteur ;
Cyril A. Walker, Auteur
Article
Christophe Amiot, Auteur ;
Olivier Lorvelec, Auteur ;
Isabelle Mandon-Dalger, Auteur ;
Antonia Sardella, Auteur ;
Patricia Lequilliec, Auteur ;
Philippe Clergeau, Auteur
New environmental conditions may impact on behaviour and morphology, and consequently affect population dynamics. Rapid response to new conditions is likely to be a key factor in species introduction success. The Red-whiskered Bulbul Pycnonotus [...]
Article
Tony A. D. Fox, Auteur ;
Thomas Kjaer Christensen, Auteur ;
Stuart Bearhop, Auteur ;
Jason Newton, Auteur
Article
Michael P. Harris, Auteur ;
Morten Frederiksen, Auteur ;
Sarah Wanless, Auteur
We studied juvenile survival of 20 cohorts of Common Guillemot Uria aalge chicks colour-ringed on the Isle of May, Scotland, using both live observations at the colony and dead recoveries, allowing estimation of fidelity to the colony as well as[...]
