| Titre : | Wildfowl 57 - 2007 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Michelle H. Reynolds, Auteur ;
James H. Breeden, Auteur ;
John L. Klavitter, Auteur
Dans
Wildfowl (57 2007)
The Laysan Teal Anas laysanensis is endemic to the Hawaiian Islands, where it has been restricted to Laysan Island over the last 150 years. Individuals of this endangered species have recently been translocated to the two largest islands that co[...]
Article
Michelle H. Reynolds, Auteur ;
Lisa H. Crampton, Auteur ;
Mark S. Vekasy, Auteur
Dans
Wildfowl (57 2007)
Factors influencing breeding initiation of the endangered Laysan Teal Anas laysanensis were studied on Lavsan Island in the Hawaiian Islands National Wildlife Refuge between 1998 and 2006. Sixty-two radio-tagged adult females were tracked for 30[...]
Article
Julia Newth, Auteur ;
K.-Endrew Colhoun, Auteur ;
Olafur Einarsson, Auteur ;
Richard Hesketh, Auteur ;
Graham Mcelwaine, Auteur ;
Sverrir Thorstensen, Auteur ;
Aevar Petersen, Auteur ;
Jim Wells, Auteur ;
Eileen Rees, Auteur
Dans
Wildfowl (57 2007)
Between 1988 and 2006, a total of 5,110 Whooper Swans Cygnus cygnus were caught and marked with plastic leg-rings in four geographically discrete parts of Iceland. Of these, 53.6% were subsequently sighted at wintering sites, mainly in Britain a[...]
Article
Jonathan Bart, Auteur ;
Carl D. Mitchell, Auteur ;
Michael N. Fisher, Auteur ;
James A. Dubvsky, Auteur
Dans
Wildfowl (57 2007)
We estimated the detection ratio for Rocky Mountain Trumpeter Swans Cygnus buccinator that were counted during aerial surveys made in winter. The standard survey involved counting white or grey birds on snow and ice and thus might be expected to[...]
Article
Jean-Baptiste Mouronval, Auteur ;
Matthieu Guillemain, Auteur ;
Aurelien Canny, Auteur ;
Frederik Poirier, Auteur
Dans
Wildfowl (57 2007)
Gravel pits are important habitats for wintering waterbirds, yet food selection by wildfowl wintering at these wetlands has seldom been studied. Here we describe the diet of eight dabbling and diving duck species, and also of Coot Fulica atra, a[...]
Article
Robin M. Ward, Auteur ;
Peter A. Cranswick, Auteur ;
Melanie Kershaw, Auteur ;
Graham E. Austin, Auteur ;
Allan W. Brown, Auteur ;
Lyndesay M. Brown, Auteur ;
Jon C. Coleman, Auteur ;
Helen K. Chisholm, Auteur ;
Chris J. Spray, Auteur
Dans
Wildfowl (57 2007)
In 2002, a census of Mute Swans Cygnus olor was carried out in Great Britain and the Isle of Man, to determine the size of the Mute Swan population during the breeding season and to distinguish between the numbers of breeding and non-breeding bi[...]
Article
Hugh Boyd, Auteur
Dans
Wildfowl (57 2007)
Long-term studies of 18 populations of eight goose species breeding from arctic Canada to western Siberia have recorded annual variation in the breeding success of geese as the percentage of juveniles seen in autumn. Regression of the annual bre[...]
Article
Sonja Kaessmann, Auteur ;
Frieder Woog, Auteur
Dans
Wildfowl (57 2007)
Unlike most wild goose populations in the Western Palaearctic, the feral Greylag Geese Anser anser in Stuttgart, southwest Germany, are not known to migrate. In winter 2004/05, a study was carried out to determine how this resident group copes w[...]
