| Titre : | Journal of Ornithology 144(1) - 2003 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
V. Dierschke, Auteur ;
J. Delingat, Auteur ;
H. Schmaljohann, Auteur
According to full-day observations (scan sampling), Northern Wheatears (Oenanthe -oenanthe ) stopping over on the island of Helgoland (SE North Sea) during spring and autumn migration spent 51 - 67 % of the daylight period foraging. Large parts [...]
Article
W. Wiltschko, Auteur ;
R. Wiltschko, Auteur ;
D. S. Peters, Auteur
Article
M. Weber, Auteur ;
D. Schmidt, Auteur ;
J. Hadrich, Auteur
Residues of organochlorine pesticides and polychlorinated biphenyls (PCB) were investigated in 17 unhatched eggs of German Ospreys. The samples had been collected in the federal states of Brandenburg and Mecklenburg-West Pomerania in north-easte[...]
Article
H. Hoerschelmann, Auteur ;
J. Neumann, Auteur
Article
C. Voigt, Auteur ;
S. Leitner, Auteur ;
M. Gahr, Auteur
Previous studies have shown that extra-pair paternity occurs less frequently in island populations than in mainland populations. This is thought to be due mainly to the low genetic variability in island populations but non-genetic factors have a[...]
Article
B. Wuntke, Auteur
The development of biorhythms is an important aspect of the dynamic interaction between the young animal and its environment. The study of such phenomena gives an insight into general evolutionary characteristics of development as well as into s[...]
Article
A. Rolando, Auteur ;
L. Carisio, Auteur
The Nutcracker is considered a territorial species even though some studies have shown that conflicts are rare. Previous research suggested that Nutcrackers from two Alpine sites did not use territories during autumn and winter. The aim of the p[...]
Article
S. Dale, Auteur ;
N. Manceau, Auteur
The Yellowhammer (Emberiza citrinella ) and the Ortolan Bunting (E. hortulana ) are locally sympatric on a burned forest area in Norway where we investigated whether they differed in habitat selection. Territories of Ortolan Buntings were in are[...]
