| Titre : | Ardea 88(1) - 2000 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
J. Banbura, Auteur ;
P. Zielinski, Auteur
Dans
Ardea (88(1) 2000)
The constancy of laying date, clutch size, numbers of hatchlings and fledglings, and mean egg volume per clutch was studied in female Barn Swallows Hirundo rustica in central Poland in 1994-97. Laying dates of first clutches, clutch size, the nu[...]
Article
A. R. Jenkins, Auteur
Dans
Ardea (88(1) 2000)
Parental care by Peregrine Falcons Falco peregrinus and Lanner Falcons F. biarmicus during the nestling period was studied in two areas of South Africa. Comparisons were made between the quality of care administered to broods of Peregrine Falcon[...]
Article
E. W. M. Stienen, Auteur ;
P. W. M. Van Beers, Auteur ;
A. Brenninkmeijer, Auteur ;
JMPM Habraken, Auteur ;
MHJE Raaijmakers, Auteur ;
P. G. M. Van Tienen, Auteur
Dans
Ardea (88(1) 2000)
Highly specialised piscivorous seabirds, like Sandwich Terns Sterna sandvicensis, have limited capacity to switch to alternative prey species when the availability of a particular prey species is low. Therefore, variations in the diet of such sp[...]
Article
H. Fritz, Auteur ;
M. Guillemain, Auteur ;
S. Guerin, Auteur
Dans
Ardea (88(1) 2000)
Wintering waterfowl gathering in large flocks during the day may be attractive to avian predators in a way similar to that of bird colonies. The response of Marsh Harriers to changes in dabbling duck abundance was monitored on four freshwater si[...]
Article
R. H. Drent, Auteur
Dans
Ardea (88(1) 2000)
Article
S. J. Marsden, Auteur ;
M. S. Sullivan, Auteur
Dans
Ardea (88(1) 2000)
Intersexual differences in feeding rates, aggression rates, and feeding site selection were investigated in a flock of up to 2700 Pochard Aythya ferina wintering at Salford docks, Greater Manchester (239 males per 100 females). As often found el[...]
Article
Effects of parental effort on second brood, moult and survival in the Grey Wagtail Motacilla cinerea
S. Klemp, Auteur
Dans
Ardea (88(1) 2000)
Negative effects of current reproductive effort on components of future reproduction, called the 'cost of reproduction', have been shown experimentally in a wide range of avian species. A possible mechanism for the mediation of these costs betwe[...]
Article
C. M. Rauter, Auteur ;
P. A. Brodmann, Auteur ;
H. U. Reyer, Auteur
Dans
Ardea (88(1) 2000)
Insufficient food provisioning by parents can reduce growth rate of altricial nestlings, their size and weight at fledging, and also affect survival. Therefore at low food availability parents should increase their food provisioning effort. In i[...]
Article
D. E. Chamberlain, Auteur ;
J. A. Vickery, Auteur ;
S. Gough, Auteur
Dans
Ardea (88(1) 2000)
The seasonal variation in Skylark Alauda arvensis occurrence, in terms of both presence and abundance, was examined in relation to crop type on a number of survey sites in English lowland farmland in two periods, 1965-70 and 1990-95. These two p[...]
Article
J. A. Robinson, Auteur ;
K. C. Hamer, Auteur
Dans
Ardea (88(1) 2000)
Food provisioning rates and chick growth rates of Common Terns Sterna hirundo and Arctic Terns S. paradisaea were studied in Northeast England. Adult terns of both species fed large broods more frequently than those containing fewer chicks. Ener[...]
Article
F. Alvarez, Auteur
Dans
Ardea (88(1) 2000)
In southern Spain clutches of Rufous Bush Chats Cercotrichas galactotes that were parasitised by Cuckoos Cuculus canorus contained larger eggs than non-parasitised ones. Three alternative hypotheses are given that can explain this result. The fi[...]
Article
A. C. Perdeck, Auteur ;
M. E. Visser, Auteur ;
J. H. Van Balen, Auteur
Dans
Ardea (88(1) 2000)
The single most important environmental variable correlating with annual survival of both juvenile and adult Great Tits Parus major is the beech crop index (BCI). This index is a measure for the amount of seeds of beeches present in the winter, [...]
