| Titre : | Journal of Avian Biology 30(3) - SEP 1999 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
R. B. Bradbury, Auteur ;
R. Griffiths, Auteur
Many birds hatch their eggs asychronously while other species are more synchronous. Different hatching patterns may produce different sex-ratios through sex-biased chick mortality, but the relationship between sex-ratios and hatching pattern has[...]
Article
K. C. Hamer, Auteur ;
J. K. Hill, Auteur ;
I. Scott, Auteur
Gory's Shearwaters, in common with other species of Procellariiformes, accumulate large quantities of body fat after hatching. This pattern of development has been related both to temporal variation in feeding conditions around the colony and to[...]
Article
The relationship between juvenile body condition and pre-reproductive survival and recruitment of female Common Elders was analysed in three duckling cohorts marked in the Stavns Fjord colony, Denmark during 1991-1993, based on recoveries of fem[...]
Article
D. Shutler, Auteur ;
R. G. Clark, Auteur ;
S. T. Rutherford, Auteur ;
A. Mullie, Auteur
We analysed total clutch volumes and condition of female ducks relative to their haemosporidian blood parasite loads. Twenty-four percent of Gadwalls Anas strepera and 60% of Mallards A. platyrhynchos were infected with at least one type of bloo[...]
Article
B. Silverin, Auteur ;
R. Fange, Auteur ;
P. A. Viebke, Auteur ;
J. Westin, Auteur
Seasonal changes in the mass and histology of the spleen of juvenile and adult Willow Tits Parus montanus throughout the year were examined. The results showed that the avian spleen is a highly dynamic structure able to undergo dramatic changes [...]
Article
M. Koivula, Auteur ;
J. Viitala, Auteur
zeVoles scent mark their territories with urine and faeces that are visible in ultraviolet (UV) light. Rough-legged Buzzards Buteo lagopus feed mainly on votes. We performed a field experiment in northern Finland to test whether buzzards are att[...]
Article
M. Ueta, Auteur
I studied costs of nest defense in Azure-winged Magpies Cyanopica cyana in Tokyo, Japan in 1994 and 1995. I compared time devoted to nest defense, frequency of nestling feeding, and number of fledglings of magpies breeding near nests of Japanese[...]
Article
The composition and frequency of occurrence of mixed flocks among foraging insectivorous birds were compared between several tropical forests from South America to the Indian Ocean and Southeast Asia, and related to forest structure, foraging be[...]
Article
S. A. Hinsley, Auteur ;
P. Rothery, Auteur ;
P. E. Bellamy, Auteur
Reproductive performance of Great Tits and Blue Tits breeding in highly fragmented woodland was investigated in relation to woodland area in a landscape dominated by intensive arable agriculture in eastern England. Breeding performance was recor[...]
Article
Article
J. Banbura, Auteur ;
M. M. Lambrechts, Auteur ;
Jacques Blondel, Auteur ;
P. Perret, Auteur ;
M. Cartan-Son, Auteur
Extensive literature shows that lepidopteran larvae constitute the most important component of the diet of nestling tits (Parus spp.). In Blue Tits Parus caeruleus, breeding is usually timed to match the nestling stage to the period when caterpi[...]
Article
S. T. A. Timmermans, Auteur ;
C. D. Ankney, Auteur
Article
D. L. Swanson, Auteur ;
K. L. Dean, Auteur
Increases in maximal capacity for thermogenesis (or Peak Metabolic Rate, PMR) are typically associated with winter acclimatization in passerines showing marked seasonal changes in cold tolerance. Thermogenic capacity also increases in spring mig[...]
Article
A. C. Pagliani, Auteur ;
P. L. M. Lee, Auteur ;
R. B. Bradbury, Auteur
Theory predicts skewed offspring sex-ratios in a range of situations in which the economics of producing the two sexes differ. Offspring sex-ratio skews in birds are relatively scarcely observed compared to other taxa. This could be because avia[...]
