| Titre : | Journal of Avian Biology 31(1) - MAR 2000 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
G. M. Hilton, Auteur ;
R. W. Furness, Auteur ;
D. C. Houston, Auteur
We present data on digestive efficiencies and gut retention times of eight North Atlantic seabird species, fed on two fish species - lesser sandeel Ammodytes marinus and whiting Merlangius merlangus - which commonly occur in the diet of wild sea[...]
Article
V. M. Vaananen, Auteur
To reduce nest predation certain duck species nest in association with more aggressive species. For instance, Pochard Aythya ferina and Tufted Duck Aythya fuligula often nest in association with small larids, such as the Black-headed Gull Larus [...]
Article
Nestling sex ratios in a population of Bluethroats Luscinia svecica inferred from AFLP (TM) analysis
S. Questiau, Auteur ;
N. Escaravage, Auteur ;
M. C. Eybert, Auteur ;
P. Taberlet, Auteur
We studied the sex ratio of Bluethroat Luscinia svecica broods using AFLPs. Our aim was to test whether there is a bias towards males that could be explained by sexual selection thee-tries, or conversely, a bias towards females that could help e[...]
Article
M. Klaassen, Auteur ;
H. Biebach, Auteur
Radar observations on the altitude of bird migration and altitudinal profiles of meteorological conditions over the Sahara desert are presented for the autumn migratory period. Migratory birds By at an average altitude of 1016 m (a.s.l.) during [...]
Article
G. Matessi, Auteur ;
T. Dabelsteen, Auteur ;
A. Pilastro, Auteur
Populations of Reed Buntings Emberiza schoeniclus in the western Palearctic are classified in two major subspecies groups according to morphology: northern migratory schoeniclus and Mediterranean resident intermedia. Songs of the two groups diff[...]
Article
P. Howlett, Auteur ;
I. Juttner, Auteur ;
S. J. Ormerod, Auteur
The effects of community dynamics in birds on the optimisation of their migratory strategies is a neglected area. For three years, we captured migrating warblers on autumn passage at a coastal site in western Britain. We used canonical correspon[...]
Article
T. D. Williams, Auteur ;
C. J. Martyniuk, Auteur
Changes in tissue masses associated with egg production were investigated in female Zebra Finches Taeniopygia gutatta using dietary and hormonal manipulations. We tested three hypotheses: that changes in organ masses, (a) reflect utilisation of [...]
Article
I. Krams, Auteur
In this study on free-ranging Crested Tits Parus cristatus, I examine the relationship between social dominance and the frequency of use of long-range communication calls. Calling rates of trills were highest among socially dominant individuals [...]
Article
F. J. Pulido, Auteur ;
M. Díaz, Auteur
We analysed the foraging behaviour of free-ranging Blue Tits Parus caeruleus in open helm oak Quercus ilex woodlands of western Spain during winter. Such woodlands are patchy for foraging tits because of the scattered distribution of trees and t[...]
Article
D. F. Westneat, Auteur ;
T. B. Rambo, Auteur
One often cited but poorly studied cost of multiple mating by female birds is the risk of acquiring sexually transmitted pathogens. We examined the ejaculates of male Red-winged Blackbirds Agelaius phoeniceus to determine if exposure to bacteria[...]
Article
R. A. Phillips, Auteur ;
K. C. Hamer, Auteur
Although periodic weighing of chicks is used widely as a means to assess meal mass and feeding frequency in seabirds, there have been few critical assessments of its effectiveness. Using established methods, we were able to predict whether feedi[...]
Article
S. Eggers, Auteur
Seasonal shifts in the diets of Garden Warblers Sylvia borin, Blackcaps S. atricapilla and Lesser Whitethroats S. curruca at a North German site were studied from samples obtained by flushing the digestive tract of the birds. The significance of[...]
Article
T. J. S. Balsby, Auteur
To investigate whether song variability or activity could he used as a cue to male quality in the Whitethroat Sylvia communis and whether the song influenced female choice, songs from le, males were recorded and analysed, and their perch song an[...]
