| Titre : | Journal of Ornithology 148(2) - APR 2007 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Karel Weidinger, Auteur
Researchers are moving their attention away from the Mayfield method of estimating nest success to advanced nest survival models that can be implemented within statistical software packages. In spite of this, little attention has been paid to de[...]
Article
Tibor Szép, Auteur ;
Anders Pape Moller, Auteur ;
Steven Piper, Auteur ;
Rick Nuttall, Auteur ;
Zoltan D. Szabo, Auteur ;
Péter L. Pap, Auteur
Article
Angelika Poesel, Auteur ;
Torben Dabelsteen, Auteur ;
Safi-Kirstine Darden, Auteur ;
Kaspar Delhey, Auteur ;
Anne Peters, Auteur
Multiple phenotypic traits can affect the outcome of interactions among territorial animals. Individuals may use current and previously acquired information on phenotypic traits to assess the competitive ability of opponents and adjust the stren[...]
Article
Paulo Catry, Auteur ;
Stuart Bearhop, Auteur ;
Miguel Lecoq, Auteur
In passerine birds, males are generally larger and dominant over females. In line with the dominance theory, in all known differential migrant passerines, females migrate further than males. However, there are alternative explanations to the dom[...]
Article
Norbert Kenntner, Auteur ;
Yvon Crettenand, Auteur ;
Hans-Joachim Fuenfstueck, Auteur ;
Martin Janovsky, Auteur ;
Frieda Tataruch, Auteur
Lead poisoning and organ levels of the non-essential heavy metals lead, cadmium and mercury of seven free-ranging golden eagles (Aquila chrysaetos) from the European Alps, and of one 23-year-old captive golden eagle are reported. All birds were [...]
Article
Effect of fog on the arrival time of little penguins Eudyptula minor: a clue for visual orientation?
André Chiaradia, Auteur ;
John McBride, Auteur ;
Tanya Murray, Auteur ;
Peter Dann, Auteur
We report a dramatic change in the arrival time of little penguins Eudyptula minor at their breeding colony when a heavy low-level fog was present on the southern beaches of Phillip Island, Australia. On the evening of 21 December 2002, only 5% [...]
Article
The relationship between colouration and kleptoparasitic efficiency (success rate and chase rate) was studied in the polymorphic arctic skua, Stercorarius parasiticus, at a Mediterranean migration site. A shift in the ratio of morphs through the[...]
Article
Tomasz Wilk, Auteur ;
Anna Dubiec, Auteur ;
Mariusz Cichoń, Auteur
The seasonal decline in offspring performance is a frequently reported phenomenon in species breeding in a temperate zone, but the potential effect of brood sex ratio on such declines has not been studied. Here, we predicted that this decline ma[...]
Article
Bernd-Ulrich Meyburg, Auteur ;
Christiane Meyburg, Auteur ;
Florian Franck-Neumann, Auteur
There is very little confirmed information on the social organisation of breeding Lesser Spotted Eagle populations, the turnover rate of adults, and their nest-site and partner fidelity. According to established knowledge, however, breeding indi[...]
Article
Jakob Augustin, Auteur ;
Donald Blomqvist, Auteur ;
Tibor Szép, Auteur ;
Zoltan D. Szabo, Auteur ;
Richard H. Wagner, Auteur
Genetic parentage studies of socially monogamous birds reveal a widespread prevalence of extra-pair paternity. Variation in extra-pair paternity among individuals may depend on how different individuals benefit from extra-pair fertilisations and[...]
Article
Markus Metz, Auteur ;
Nicole Geberzahn, Auteur ;
Lars H. Hansen, Auteur ;
Georg M. Klump, Auteur ;
Thomas W. P. Friedl, Auteur
In this study we have investigated the effect of nest-building behaviour, courtship behaviour, and male-male interactions on male reproductive performance of the red bishop (Euplectes orix), a highly polygynous, colonially breeding weaverbird sp[...]
Article
Marian Janiga, Auteur ;
Agnesa Sedlarova, Auteur ;
Robin Rigg, Auteur ;
Martina Novotna, Auteur
Patterns of prevalence in communities of bacteria in free-living adult, juvenile, and feces of alpine accentors (Prunella collaris) were studied in the West Carpathian Mountains, Slovakia, in 2002-2003. A total of 27 species of bacteria belongin[...]
Article
Les G. Underhill, Auteur
Article
Matthieu Guillemain, Auteur ;
Céline Arzel, Auteur ;
Pierre Legagneux, Auteur ;
Johan Elmberg, Auteur ;
Hervé Fritz, Auteur ;
Michel Lepley, Auteur ;
Christophe Pin, Auteur ;
Antoine Arnaud, Auteur ;
Gregoire Massez, Auteur
Mate guarding by males is common in species with long-lasting pair bonds. We tested if the need to guard females affected foraging depth in male teal (Anas crecca), and if they were more vigilant than females when foraging with submerged eyes (p[...]
Article
L. Gerardo Herrera, Auteur ;
Julio C. Reyna E, Auteur
Analysis of stable isotope ratios is increasingly used to reconstruct diets in passerine birds, but studies of diet-tissue isotopic discrimination for this avian group are scarce. We determined N-15 and C-13 diet-tissue discrimination factors on[...]
Article
Stefan Garthe, Auteur ;
Bernd-Olaf Flore, Auteur
The breeding population of the sandwich tern (Sterna sandvicensis) on the German North Sea coast has undergone substantial fluctuations throughout the last 100 years. Numbers of breeding birds were fluctuating quite strongly in the first 30 year[...]
