| Titre : | Journal of Avian Biology 45(1) - JAN 2014 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Etienne Sirot, Auteur ;
Frederic Touzalin, Auteur
Birds arriving from spring migration have higher chances of securing a territory if they reach the breeding area before their companions. However, an early arrival may compromise their chances of surviving until reproduction begins. Here, we stu[...]
Article
Talia H. Sechley, Auteur ;
Dan Strickland, Auteur ;
D. Ryan Norris, Auteur
Animals that reside at high latitudes and altitudes year-round often use cached food to survive over the winter months, but a few species also rely on stored food to sustain them during the breeding season when the nutritional requirements of fe[...]
Article
David Monticelli, Auteur ;
Pedro M. Araújo, Auteur ;
James E. Hines, Auteur ;
Paulo Q. Tenreiro, Auteur ;
Luis P. Silva, Auteur ;
Jaime A. Ramos, Auteur
Adult survival, an important fitness component, is usually 1) lower in lighter individuals due to their reduced ability to survive winter conditions compared to heavier ones, especially in resident species at northern temperate latitudes and 2) [...]
Article
Johan Nilsson, Auteur ;
Thomas Alerstam, Auteur ;
Jan-Ake Nilsson, Auteur
Article
Michal Budka, Auteur ;
Gunvar Mikkelsen, Auteur ;
Lucia Turčoková, Auteur ;
Yoan Fourcade, Auteur ;
Svein Dale, Auteur ;
Tomasz S. Osiejuk, Auteur
This study was conducted to characterise macrogeographic variation in the vocalisation of the corncrake Crex crex, a bird species with a non-learned and highly stereotyped call. We also examined: 1) whether call characteristics remained stable a[...]
Article
Jose M. Costa, Auteur ;
Jaime A. Ramos, Auteur ;
Luís P. da Silva, Auteur ;
Sergio Timoteo, Auteur ;
Pedro M. Araújo, Auteur ;
Marcial S. Felgueiras, Auteur ;
Antonio Rosa, Auteur ;
Claudia Matos, Auteur ;
Paulo Encarnacao, Auteur ;
Paulo Q. Tenreiro, Auteur ;
Ruben H. Heleno, Auteur
Fruits and seeds are critical food sources for many European passerines during the autumn migration, which in turn contribute to disperse seeds either internally, i.e. after ingestion (endozoochory), or externally, when seeds adhere to the body [...]
Article
Jacintha G. B. van Dijk, Auteur ;
Wlodzimierz Meissner, Auteur ;
Marcel Klaassen, Auteur
Hydrogen stable isotopes (H-2) in feathers are used to determine the origin and migration strategy of birds. To identify the geographic location of the site of feather synthesis, calibration curves for the relation between feather H-2 and amount[...]
Article
Michal Vinkler, Auteur ;
Jana Svobodová, Auteur ;
Barbora Gabrielová, Auteur ;
Hana Bainova, Auteur ;
Anna Bryjova, Auteur
Researchers interested in ecological immunology face substantial methodological problems: 1) most immunological approaches are difficult to perform in free-living animals, 2) in some of the applicable methods the immunological background of the [...]
Article
Piotr Minias, Auteur ;
Krzysztof Kaczmarek, Auteur ;
Radoslaw Wlodarczyk, Auteur ;
Tomasz Janiszewski, Auteur
Adaptative significance of melanin-based coloration in birds remains poorly recognized. It has been suggested that genes responsible for melanin synthesis may have pleiotropic effect on several physiological and behavioural functions, including [...]
Article
Kaat Brulez, Auteur ;
Phillip Cassey, Auteur ;
Alan Meeson, Auteur ;
Ivan Mikšík, Auteur ;
Simone L. Webber, Auteur ;
Andrew G. Gosler, Auteur ;
S. James Reynolds, Auteur
Eggshell maculation of most passerines is due to the deposition of the pigment protoporphyrin which is produced during biosynthesis of blood haem. Its functional significance has only received empirical attention in recent years. This interest h[...]
Article
Courtney A. C. Coon, Auteur ;
Lynn B. Martin, Auteur
Avian haemosporidian infections (of the genera Haemoproteus, Plasmodium and Leucocytozoon) can regulate passerine populations. Thus, reduction in the number of avian haemosporidian infections in a population, for example in recently introduced h[...]
Article
Sarah Guindre-Parker, Auteur ;
Oliver P. Love, Auteur
Support against the condition-dependence of melanin plumage signals has relied on data from species exhibiting both melanin- and carotenoid-based plumage ornaments. As the mechanisms leading to variation in carotenoid- and melanin-based plumage [...]
Article
T. T. Pham, Auteur ;
P. S. Queller, Auteur ;
K. A. Tarvin, Auteur ;
T. G. Murphy, Auteur
Status signals are linked to fighting ability and enable competitors to gain access to resources without risking injury in aggressive combat. The relationship between testosterone (T), a hormone that mediates aggression, and signals of status is[...]
Article
Aleksi Lehikoinen, Auteur ;
Martin Green, Auteur ;
Magne Husby, Auteur ;
John Atle Kålås, Auteur ;
Ake Lindstroem, Auteur
Large-scale multi-species data on population changes of alpine or arctic species are largely lacking. At the same time, climate change has been argued to cause poleward and uphill range shifts and the concomitant predicted loss of habitat may ha[...]
Article
Thomas Gruenkorn, Auteur ;
Astrid Potiek, Auteur ;
Volker Looft, Auteur ;
Rudy M. Jonker, Auteur ;
Nayden Chakarov, Auteur ;
Oliver Krueger, Auteur
Density-dependent reproduction is commonly explained by either the habitat heterogeneity (HHH) or individual adjustment (IAH) hypothesis. Under the HHH, high quality territories are assumed to be occupied first. At higher density, occupation of [...]
