| Titre : | Journal of Avian Biology 29(3) - SEP 1998 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
H. Fritz, Auteur
Twenty-five kleptoparasitic attempts by Kestrels on Short-eared Owls were recorded in 16 afternoons of observation (70 hours) during the winter of 1996-97 in western France. Nine attempts were successful. The daily hunting yield of Kestrels is r[...]
Article
H. Poysa, Auteur ;
P. Runko, Auteur ;
V. Ruusila, Auteur
Article
M. P. Lombardo, Auteur
Sexually transmitted diseases (STDs) in animals are caused by pathogens that are transmitted during copulation. Birds have played an important role in the development of STD-centered theories of mating behavior. However, it is not known whether [...]
Article
P. Catry, Auteur ;
N. Ratcliffe, Auteur ;
R. W. Furness, Auteur
We investigated the effect of hatching date on chick body condition, chick survival, post-fledging survival and eventual breeding performance as an adult (laying date and clutch volume) of Great Skuas in Foula (Shetland). In 10 out of 16 years t[...]
Article
N. Ratcliffe, Auteur ;
R. W. Furness, Auteur ;
N. I. Klomp, Auteur
The clutch size, a-egg volume and hatching success of Great Skuas on Foula, Shetland, were examined on successive breeding attempts following recruitment. Clutch size and a-egg volume increased with breeding experience but hatching success was n[...]
Article
P. A. R. Hockey, Auteur ;
J. K. Turpie, Auteur ;
C. R. Velasquez, Auteur ;
P. FitzPatrick, Auteur
Deferred northward migration by young waders has been ascribed to the "risks of long-distance migration", but the nature of these risks has not been explored. We suggest that the low foraging proficiency of young waders is an important factor in[...]
Article
N. J. Royle, Auteur ;
K. C. Hamer, Auteur
We manipulated the within-brood mass hierarchy of Lesser Black-backed Gulls Larus fuscus, controlling for chick quality (related to laying order) by swapping last hatched (c-) chicks in experimental broods with a- or b- chicks from residual broo[...]
Article
Article
T. H. Ringsby, Auteur ;
B. E. Saether, Auteur ;
E. J. Solberg, Auteur
We studied how variation in different reproductive traits (hatching date, clutch number and clutch size) in addition to mass, size and condition of the fledgling influenced its probability of survival until recruitment in a House Sparrow populat[...]
Article
N. M. Waser, Auteur ;
J. A. McRobert, Auteur
Hummingbirds foraging for nectar in mountains of the western USA encounter spatially-variable rewards under energetically-demanding environmental conditions. Previous workers have found that hummingbirds respond quickly to the average quantity a[...]
Article
C. Kullberg, Auteur
Behavioural studies indicate that the use of foraging niches in wintering tits is the outcome of a trade-off between using sites rich in food and keeping exposure to predators as low as possible. Previous studies suggest that predation risk vari[...]
Article
R. Lockwood, Auteur ;
J. P. Swaddle, Auteur ;
J. M. V. Rayner, Auteur
In this paper we review the existing methods of quantifying avian wingtip shape, and compare their efficiency at detecting morphological adaptations to migration. We use multivariate methods to derive two novel measures of avian wingtip shape, p[...]
Article
I. J. Oien, Auteur ;
A. Moksnes, Auteur ;
E. Roskaft, Auteur ;
M. Honza, Auteur
We investigated the impact of Cuckoo Cuculus canorus parasitism on Reed Warbler Acrocephalus scirpaceus breeding success in the southeastern part of the Czech Republic. Of 1108 nests, 178 (16.1%) were parasitized. We compared several breeding pa[...]
Article
J. Bried, Auteur ;
P. Jouventin, Auteur
Lesser Sheathbills Chionis minor are sedentary and territorial birds which establish their territories and feed in seabird colonies on subantarctic islands. In the Kerguelen Archipelago only, they also live on territories away from seabirds. In [...]
Article
S. Fitzpatrick, Auteur
Interspecific comparisons have previously shown both a dullness in male plumage and a reduction in wing length of both resident and island species compared with migratory and continental species, respectively. Intraspecific comparisons between s[...]
Article
B. Silverin, Auteur ;
J. C. Wingfield, Auteur
The adrenocortical response to acute stress, as measured by increases in plasma levels of corticosterone following capture and handling, has been shown to vary between individuals within a population as well as with season in a variety of specie[...]
Article
Heinz Hafner, Auteur ;
Yves Kayser, Auteur ;
V. Boy, Auteur ;
M. Fasola, Auteur ;
A. C. Julliard, Auteur ;
R. Pradel, Auteur ;
F. Cezilly, Auteur
Survival rates, natal dispersal, and age at first breeding of Little Egrets Egretta garzetta breeding in the Camargue (southern France) were estimated using individually marked birds observed in nesting colonies from 1987 to 1995. Survival and p[...]
