| Titre : | Journal of Ornithology 147(4) - OCT 2006 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Andrzej Dyrcz, Auteur ;
Lucyna Halupka, Auteur
A cuckoo Cuculus canorus dummy was exposed at 24 nests of great reed warbler Acrocephalus arundinaceus (GRW) and 34 nests of reed warbler Acrocephalus scirpaceus (RW) during the egg-laying stage. The eight GRW pairs attacked the cuckoo directly,[...]
Article
Yoram Yom-Tov, Auteur ;
Shlomith Yom-Tov, Auteur
Recent studies indicated that body size of various animals, including birds, changed during the twentieth century, and these changes were attributed to changes in food availability and climate. We used museum skins of goshawks (Accipiter gentili[...]
Article
H. Martin Schaefer, Auteur ;
Veronika Schaefer, Auteur
Although many studies have been published on avian fruit selection, few have addressed the effects of fruit scarcity on the patterns of fruit choice. Here, we compared the consumption of seven bird species for six simultaneously present maturati[...]
Article
Massimo Favaron, Auteur ;
Giovanni C. Scherini, Auteur ;
Damiano Preatoni, Auteur ;
Guido Tosi, Auteur ;
Luc A. Wauters, Auteur
Studies of rock ptarmigan Lagopus mutus in northern latitudes have shown that, in the breeding season, the majority of cocks pair monogamously and defend small territories, whilst in most populations, a small proportion of cocks are polygynous o[...]
Article
Jose E. Martinez, Auteur ;
Iluminada Pagan, Auteur ;
Jose F. Calvo, Auteur
A population of booted eagles (Hieraaetus pennatus) consisting of 21-29 pairs was studied for 7 years (1998-2004) in a forested mountainous region of southeastern Spain. The average egg-laying time was 25 April (earliest 31 March, latest 26 May)[...]
Article
Jesko Partecke, Auteur ;
Eberhard Gwinner, Auteur ;
Staffan Bensch, Auteur
Because of the extreme ecological and environmental changes along an urban-rural gradient, it has been proposed that urbanised and non-urbanised populations of the same species may be distinctly isolated. There is evidence that urban populations[...]
Article
Jose L. Osorno, Auteur ;
Judith Morales, Auteur ;
Juan Moreno, Auteur ;
Santiago Merino, Auteur ;
Gustavo Tomás, Auteur ;
Rodrigo A. Vásquez, Auteur
We present evidence of differential maternal allocation to eggs in response to manipulated male attractiveness in the migratory pied flycatcher (Ficedula hypoleuca). We manipulated the size of a male secondary sexual trait, the white forehead pa[...]
Article
Katarzyna Wojczulanis, Auteur ;
Dariusz Jakubas, Auteur ;
Wojciech Walkusz, Auteur ;
Liv Wennerberg, Auteur
Sex differences in the quality and quantity of food loads brought to little auk (Alle alle) chicks were investigated in a large colony in Hornsund (South Spitsbergen). Adults returning to the colony were caught in mist-nets and food loads were t[...]
Article
Ilse Storch, Auteur ;
Maria Jose Banuelos, Auteur ;
Alberto Fernandez-Gil, Auteur ;
Jose Ramon Obeso, Auteur ;
Mario Quevedo, Auteur ;
Rolando Rodriguez-Munoz, Auteur
The Cantabrian capercaillie Tetrao urogallus cantabricus, a subspecies of the western capercaillie, is endemic to the Cantabrian Mountains of northwest Spain. The range is separated from its nearest neighbouring capercaillie population by a dist[...]
Article
Ole R. Therkildsen, Auteur ;
Thomas Bregnballe, Auteur
The relationship between the inundation of a salt marsh in southeast Denmark not subject to lunar tides and the availability and predation of seeds of the annuals Salicornia spp. and Suaeda maritima by autumn staging dabbling ducks was studied b[...]
Article
Lukas Jenni, Auteur ;
Susanne Mueller, Auteur ;
Fernando Spina, Auteur ;
Anders Kvist, Auteur ;
Ake Lindstroem, Auteur
The effects of an endurance flight on the haematocrit, the percentage of packed red blood cells per blood volume, were examined within the framework of six possible factors explaining possible changes in the haematocrit. Two approaches were adop[...]
Article
In spring 2002 and 2003, two new small colonies of three and five pairs, respectively, of Little Curlew (Numenius minutus) were discovered in the Oimjakon Mountains (Yakutia, Russia)
Article
Jon Fjeldså, Auteur ;
Rauri C. K. Bowie, Auteur ;
Jacob Kiure, Auteur
The forest batis, Batis mixta, is a common bird of the forests of the Eastern Arc Mountains of Tanzania and in some adjacent montane and coastal forests. Through new collecting efforts in most of this range we documented a well-marked change in [...]
Article
Eric W. M. Stienen, Auteur ;
Alex Brenninkmeijer, Auteur
The mortality of Sandwich tern Sterna sandvicensis chicks held in enclosures was studied in colonies on Griend, in the Dutch Wadden Sea, from 1992 to 1999, and on Hirsholm, in the Danish Kattegat, in 1997. Survival of chicks until fledging was 7[...]
Article
Marcel Honza, Auteur ;
Vaclav Sicha, Auteur ;
Petr Procházka, Auteur ;
Radka Lezalova, Auteur
We tested great reed warbler (Acrocephalus arundinaceus) discrimination against two common cuckoo (Cuculus canorus) female color morphs (gray and rufous) in two areas with different parasitism rates and proportions of the two morphs. Hosts recog[...]
Article
Johnny Kahlert, Auteur
The escape behaviour of flightless greylag geese Anser anser has been studied at a Danish moult site. In more than 40% of escapes, a stimulus could not be discerned, suggesting some importance of inaccurate risk assessment among the geese. Quasi[...]
Article
Mariusz Kasprzak, Auteur ;
Tomasz Hetmanski, Auteur ;
Ewa Kulczykowska, Auteur
The blood parameters-red blood cell (RBC) count, hematocrit (Ht), hemoglobin concentration (Hb), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), and mean corpuscular hemoglobin concentration (MCHC)-were studied for the first ti[...]
Article
F. E. Zachos, Auteur ;
U. Schmoelcke, Auteur
A review of the Holocene records of the osprey (Pandion haliaetus) in Central Europe indicates an immigration around 10,000 years BP at the latest. During the middle Holocene-9,000-5,000 years BP-the species seems to have been common in the sout[...]
Article
Marc I. Foerschler, Auteur ;
Elisabeth K. V. Kalko, Auteur
The breeding ecology and nest site selection of mainland Citril Finches and insular Corsican Finches have been studied throughout their limited range. For many years both endemic forms were considered to be two sub-species; however, based on evi[...]
Article
Cristobal Perez, Auteur ;
Alberto Velando, Auteur ;
Jorge Dominguez, Auteur
Different mortality of males and females during early post-hatching development in sexually size-dimorphic bird species is usually attributed to different nutritional requirements of the sexes, because mortality is mostly biassed toward the larg[...]
