| Titre : | Journal of Avian Biology 40(5) - SEP 2009 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Jordan Karubian, Auteur ;
John P. Swaddle, Auteur ;
Claire W. Varian-Ramos, Auteur ;
Michael S. Webster, Auteur
Understanding why males of many species exhibit two or more sexual ornaments depends upon identifying both the information conveyed and the intended receiver(s) for each signal. Here we focus on identifying the intended receivers for two sexual [...]
Article
Kathleen M. C. Tjorve, Auteur ;
Gabriel E. García-Peña, Auteur ;
Tamás Székely, Auteur
The rate at which a young bird grows is highly diverse across taxa. We investigated the influences of ecological variables on growth rates of shorebirds, gulls and their allies (order Charadriiformes) using comparative analyses of 68 species. We[...]
Article
Darren E. Irwin, Auteur ;
Alan Brelsford, Auteur ;
David P. L. Toews, Auteur ;
Christie MacDonald, Auteur ;
Mark Phinney, Auteur
There are many pairs of related western and eastern avian taxa in North America, and for many of these, little is known about their interactions in sympatry. One example is provided by MacGillivray's warblers Oporornis tolmiei and mourning warbl[...]
Article
Tuul Sarv, Auteur ;
Peeter Horak, Auteur
Measurement of phytohaemagglutinin (PHA)-induced skin swelling is the most popular assay of immune function in avian studies. The mechanisms causing swelling have been relatively well studied; however, very little is known about the potential lo[...]
Article
Jonathan A. Green, Auteur ;
Ian L. Boyd, Auteur ;
Anthony J. Woakes, Auteur ;
Nicholas L. Warren, Auteur ;
Patrick J. Butler, Auteur
We measured daily energy expenditure (DEE) continuously for a whole year in a free ranging bird, the macaroni penguin Eudyptes chrysolophus. We combined these measurements with concurrently recorded foraging behaviour, and literature information[...]
Article
Todd A. Boonstra, Auteur ;
Mark E. Clark, Auteur ;
Wendy L. Reed, Auteur
Variation in maternal investments to offspring presumably reflects an optimization of resource allocation such that a female's fitness is maximized. In birds, both egg size and yolk constituents are examples of resources that can vary among offs[...]
Article
Nicholas Horrocks, Auteur ;
Christopher Perrins, Auteur ;
Anne Charmantier, Auteur
Sexual selection theory predicts that sexually selected ornaments are costly to maintain and, as condition-dependent signals, are likely to vary in attractiveness with season and age. Mute swans Cygnus olor possess a black, fleshy knob at the ba[...]
Article
Tapio Eeva, Auteur ;
Saila Sillanpaa, Auteur ;
Juha-Pekka Salminen, Auteur
The yellow carotenoid-based plumage coloration of great tit Parus major nestlings is found to be paler in polluted and urban environments. Because carotenoid pigmentation is often considered to be a condition dependent trait in birds we wanted t[...]
Article
Roine Strandberg, Auteur ;
Raymond H. G. Klaassen, Auteur ;
Kasper Thorup, Auteur
We describe the migration performance of three long-distance migrating raptors, osprey Pandion haliaetus, honey buzzard Pernis apivorus and marsh harrier Circus aeruginosus, and one short-distance migrating raptor, common buzzard Buteo buteo bas[...]
Article
Robert A. W. Kennedy, Auteur ;
Christopher S. Evans, Auteur ;
Paul G. McDonald, Auteur
Individual differentiation is usually advantageous in maximising the fitness benefits of interactions with conspecifics. In social species, where intraspecific interactions are frequent, this is likely to be particularly important. Indeed, some [...]
Article
Ismael Galvan, Auteur ;
Juan J. Negro, Auteur ;
Gary R. Bortolotti, Auteur ;
Antoni Margalida, Auteur
We report for the first time the existence of a structural mechanism of feathers different from iridescence that makes plumage conspicuous. By using electron and light microscopy, we show that the mechanism consists of special lengthened and twi[...]
Article
Jin-Won Lee, Auteur ;
Myun-Sik Kim, Auteur ;
Terry Burke, Auteur ;
Ben J. Hatchwell, Auteur
Understanding the factors that affect the occurrence of extrapair paternity (EPP) is one of the central issues in sexual selection. We investigated genetic parentage and the ecological factors affecting patterns of EPP in the vinous-throated par[...]
