| Titre : | Journal of Avian Biology 46(1) - JAN 2015 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Lily Hou, Auteur ;
Michael Verdirame, Auteur ;
Kenneth C. Welch, Auteur
We examined the feasibility of automating the collection of hummingbird mass data facilitated by low-cost, low-power radio frequency identification (RFID) technology. In a field study in southern Ontario, wild hummingbirds were captured, subcuta[...]
Article
Olof Hellgren, Auteur
In order to fully understand pathogen induced natural variation in fitness in wild animal populations it is important to identify and study the degree of non-synonymous alleles in genes that code for components of the immune system. This study i[...]
Article
Gustavo Tomás, Auteur
Most research conducted on optimal timing of reproduction in birds has traditionally considered laying date of the first egg as the event that needs to be related to the time of maximum food availability. However, what (most) birds need to time [...]
Article
Kristen M. Covino, Auteur ;
Rebecca L. Holberton, Auteur ;
Sara R. Morris, Auteur
Behavioral decisions made by migrating songbirds may depend on a variety of biotic and abiotic factors. To investigate which factors most influence songbird behavior on stopover, we related departure and directional decisions of captive birds re[...]
Article
Johanna S. U. Hedlund, Auteur ;
Sven Jakobsson, Auteur ;
Cecilia Kullberg, Auteur ;
Thord Fransson, Auteur
Climate change can influence many aspects of avian phenology and especially migratory shifts and changes in breeding onset receive much research interest in this context. However, changes in these different life-cycle events in birds are often i[...]
Article
Sara Fraixedas, Auteur ;
Aleksi Lehikoinen, Auteur ;
Andreas Linden, Auteur
Few studies have covered both the effects of climate and land-use change on animal populations under a single framework. Besides, the scarce multi-species studies conducted have focused on breeding data, and there is little information published[...]
Article
Emma Razeng, Auteur ;
David M. Watson, Auteur
Food availability is emerging as a key determinant of avian occurrence and habitat use in a variety of systems, but insectivores have received less attention than other groups and the potential influence of nutritional quality has rarely been co[...]
Article
Jennifer L. Newbrey, Auteur ;
Cynthia A. Paszkowski, Auteur ;
Kevin J. McGraw, Auteur ;
Susanna Ogle, Auteur
In many bird species with asynchronous hatching, smaller, later-hatched nestlings are out-competed for food by their larger, earlier-hatched siblings and therefore suffer increased mortality via starvation. It is thought that female birds can ei[...]
Article
Pilar Benites, Auteur ;
Leonardo Campagna, Auteur ;
Pablo L. Tubaro, Auteur
Acoustic signals among newly diverged taxa have the potential to convey species identity, information that is key to reducing hybridization. Capuchino seedeaters constitute a remarkable example of recently radiated endemic species from the grass[...]
Article
Parasites greatly impact host fitness. The immune system is fundamental to combat endoparasites, and survival increases with greater investment in immunity. Some ectoparasites, by contrast, are reportedly combated by the use of the uropygial gla[...]
Article
Andreas Schweiger, Auteur ;
Hans-Joachim Fuenfstueck, Auteur ;
Carl Beierkuhnlein, Auteur
Climate and landscape change are expected to significantly affect trophic interactions, which will especially harm top predators such as the golden eagle Aquila chrysaetos. Availability of optimal prey is recognized to influence reproductive suc[...]
Article
W. M. G. Vansteelant, Auteur ;
W. Bouten, Auteur ;
R. H. G. Klaassen, Auteur ;
B. J. Koks, Auteur ;
A. E. Schlaich, Auteur ;
J. van Diermen, Auteur ;
E. E. van Loon, Auteur ;
J. Shamoun-Baranes, Auteur
Given that soaring birds travel faster with supportive winds or in good thermal soaring conditions, we expect weather conditions en route of migration to explain commonly observed regional and seasonal patterns in the performance of soaring migr[...]
Article
Andrea S. Grunst, Auteur ;
Melissa L. Grunst, Auteur ;
John T. Rotenberry, Auteur
Adult-directed predation risk imposes important behavioral constraints on parents and might thus alter relationships between costly sexual ornaments and parental performance. For instance, under low predation risk, highly ornamented individuals [...]
Article
Allison G. L. Patterson, Auteur ;
Alexander S. Kitaysky, Auteur ;
Donald E. Lyons, Auteur ;
Daniel D. Roby, Auteur
Stressful environmental conditions affect the adrenocortical function of developing animals, which can have consequences for their fitness. Discovery of the avian stress hormone corticosterone (CORT) in feathers has the potential to broaden the [...]
