| Titre : | Journal of Ornithology 153(4) - OCT 2012 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Indriķis Krams, Auteur ;
Valerija Suraka, Auteur ;
Kalev Rattiste, Auteur ;
Mikus Abolins-Abols, Auteur ;
Tatjana Krama, Auteur ;
Markus J. Rantala, Auteur ;
Pranas Mierauskas, Auteur ;
Dina Cīrule, Auteur ;
Lauri Saks, Auteur
Blood parasites often incur a substantial fitness cost to the infected individuals, sometimes resulting in death of the host. Some bird species, however, are apparently free of blood parasites, presumably due to the lack of exposure to blood par[...]
Article
Katharina Hirschenhauser, Auteur ;
Katharina Spreitzer, Auteur ;
Michael Lepschy, Auteur ;
Kurt Kotrschal, Auteur ;
Erich Moestl, Auteur
Japanese Quail (Coturnix japonica) are a common avian laboratory model, and measuring corticosterone metabolites (CM) non-invasively from Quail droppings would be of broad interest. Using the enzyme immunoassay suitable for measuring CM in dropp[...]
Article
Valeria Zanollo, Auteur ;
Matteo Griggio, Auteur ;
Jeremy Robertson, Auteur ;
Sonia Kleindorfer, Auteur
Colour variation in birds is often used to signal functional differences between individuals and sexes, though white plumage has usually been disregarded because white feathers were thought to be cheap to produce and hence unreliable signals. He[...]
Article
Brian G. Palestis, Auteur ;
Ian C. T. Nisbet, Auteur ;
Jeremy J. Hatch, Auteur ;
Jennifer M. Arnold, Auteur ;
Patricia Szczys, Auteur
Both male and female Roseate Terns (Sterna dougallii) have unusually long outer tail feathers, and males tend to have longer tails than females. We examined whether these tail streamers may have evolved as a result of sexual selection, using dat[...]
Article
Letizia Campioni, Auteur ;
Rui Lourenco, Auteur ;
Maria del Mar Delgado, Auteur ;
Vincenzo Penteriani, Auteur
In order to understand habitat requirements in territorial species, it is important to take into account the specific tasks and constraints associated with the different stages and social status of an individual life cycle (e.g. territorial bree[...]
Article
Karsten Laursen, Auteur ;
Anna Bodil Hald, Auteur
Despite concentrated conservation efforts and targeted agri-environmental schemes, breeding wader species have declined in most western European countries during recent decades. Assuming that wader species aggregate in relation to physical and b[...]
Article
Kasper Thorup, Auteur ;
Troels Eske Ortvad, Auteur ;
Richard A. Holland, Auteur ;
Jorgen Rabol, Auteur ;
Mikkel Willemoes Kristensen, Auteur ;
Martin Wikelski, Auteur
Migratory birds are frequently found far outside their normal range but the phenomenon is poorly understood. We used radio telemetry to track individual migratory flights of several species of songbirds on the Faroe Islands, far west of their no[...]
Article
Karen L. Krijgsveld, Auteur ;
Robert E. Ricklefs, Auteur ;
G. Henk Visser, Auteur
We measured daily energy expenditure (DEE) during the development periods of precocial chicks of five species of Arctic shorebirds spanning a broad range in size, in order to investigate the relationships between DEE, body size, and growth rate.[...]
Article
Ronny Steen, Auteur ;
Geir A. Sonerud, Auteur ;
Tore Slagsvold, Auteur
In altricial birds, parents are assumed to optimize the total food delivery to the brood given the time constraints set by self-feeding and food collecting. Older nestlings may require more food than younger ones, and nestlings may need more ene[...]
Article
Rita Ventim, Auteur ;
Luisa Mendes, Auteur ;
Jaime A. Ramos, Auteur ;
Helder Cardoso, Auteur ;
Javier Pérez-Tris, Auteur
When colonizing a new area, introduced species may lose their original haemoparasites. If the local parasites are unable to infect the novel introduced hosts, these may gain a fitness advantage over their local competitors. Alternatively, the in[...]
Article
Sebastian K. Herzog, Auteur ;
Oswaldo Maillard Z, Auteur ;
Dirk Embert, Auteur ;
Patricia Caballero, Auteur ;
Dennise Quiroga, Auteur
Accurate extent of occurrence (EOO) estimates are essential for reliable conservation assessments. Recent studies suggest that current EOO maps often significantly overestimate range sizes of birds, particularly for narrow-ranging, threatened an[...]
Article
Alejandro Simeone, Auteur ;
Guillermo Luna-Jorquera, Auteur
Rats (Rattus spp.) are among the most successful alien predators brought to islands by humans and have had devastating impacts on numerous seabird populations, but studies demonstrating rates of consumption and ecological impacts on penguins are[...]
Article
Alfonso Marzal, Auteur ;
Tamer Albayrak, Auteur
The study of local variations in abundance and lineage distribution within the same host species is essential in order to understand the virulence and the differences in risk of exposure between individuals. Several studies have investigated fac[...]
Article
D. Kishkinev, Auteur ;
H. Mouritsen, Auteur ;
C. V. Mora, Auteur
Birds are thought to possess two magnetosensory systems: (1) a chemical sensor in the bird's eye, and (2) a magnetoreceptor innervated by the ophthalmic branch of the trigeminal nerve (V1) and presumably located in the upper beak. It has been re[...]
Article
Allison T. Moody, Auteur ;
Keith A. Hobson, Auteur ;
Anthony J. Gaston, Auteur
Arctic ecosystems are especially vulnerable to anthropogenic influences including increasing contaminant levels and climatic change. To predict effects of these changes, it is important to understand trophic relationships of arctic organisms and[...]
Article
Maintenance of gene flow by female-biased dispersal of Black Grouse Tetrao tetrix in northern Sweden
Carolina Corrales, Auteur ;
Jacob Höglund, Auteur
Sex-biased dispersal is a common phenomenon in most birds. In general, males breed at or near their site of birth while most of the females disperse. We investigated the dispersal patterns and genetic structure of lekking Black Grouse Tetrao tet[...]
Article
Friederike Woog, Auteur ;
Konrad Schwarz, Auteur ;
Mark Hulme, Auteur
Peck rates (pecks/min) were used to compare the relative frequencies of food intake of Greylag Geese (Anser anser) of different gosling ages and of different social statuses. As the goslings grew up, their peck rates increased, and by the time o[...]
Article
Jeovanna Lowe, Auteur ;
David Pothier, Auteur ;
Ghislain Rompre, Auteur ;
Jean-Pierre L. Savard, Auteur
Little information is available on long-term changes in bird communities following fire in the unmanaged forest. We have evaluated and compared bird species communities along two long-term chronosequences after fire (0 to > 200 years post-fire) [...]
Article
Mathieu Giraudeau, Auteur ;
Matthew B. Toomey, Auteur ;
Kevin J. McGraw, Auteur
Carotenoid pigments are involved in different physiological processes (e.g., immunoenhancement, antioxidant activity) in addition to coloring plumage and integuments. As animals cannot synthesize these pigments de novo, it has been proposed that[...]
Article
Daqing Zhou, Auteur ;
L. M. Chu, Auteur
Parks are diversity hotspots in cities, and are generalized isolated "islands" in urban landscapes. However, there is a paucity of information on the avian community structure of urban parks in big cities in Southeast Asia, including Hong Kong w[...]
Article
D. E. Chamberlain, Auteur ;
M. Bocca, Auteur ;
L. Migliore, Auteur ;
E. Caprio, Auteur ;
A. Rolando, Auteur
The Black Grouse Tetrao tetrix is primarily a lekking species, although in some populations solitary display is also common. We analysed data from a 25-year-long survey of an increasing Black Grouse population in the western Italian Alps in orde[...]
Article
Heiner Flinks, Auteur ;
Volker Salewski, Auteur
Wing and tail length measurements are important tools in ornithology. Amongst linear measurements, wing length has been considered to be the best indicator for body size for taxonomy and ecomorphology, as well as for studies about the impact of [...]
Article
Cosima Tegetmeyer, Auteur ;
Marco Thoma, Auteur ;
Susanne Arbeiter, Auteur
The globally threatened Aquatic Warbler Acrocephalus paludicola is a Palearctic-African long-distance migrant that undergoes a complete moult while wintering in Africa. Little is known about the timing of moult and the birds' mobility during mou[...]
Article
Paul F. Donald, Auteur ;
Kai Gedeon, Auteur ;
Nigel J. Collar, Auteur ;
Claire N. Spottiswoode, Auteur ;
Mengistu Wondafrash, Auteur ;
Graeme M. Buchanan, Auteur
We attempt to describe and explain the peculiarly restricted distribution of the globally threatened Ethiopian Bush-crow Zavattariornis stresemanni. At a regional scale, models containing only correlates of land cover suggested a far wider distr[...]
Article
Mark C. Mainwaring, Auteur ;
Megan Dickens, Auteur ;
Ian R. Hartley, Auteur
Sexual size dimorphism results in asymmetric sibling competition, and nestlings of the smaller sex are expected to prioritise the development of those morphological characters that maximise effective sibling competition. In this study, we test t[...]
