| Titre : | Journal of Avian Biology 41(5) - SEP 2010 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Monika Zielinska, Auteur ;
Anna Dubiec, Auteur ;
Piotr Zieliński, Auteur
Sex ratio at conception may be under selection pressure, given that male and female offspring differ in the cost of production or generate different fitness returns under specific conditions. We studied adjustments in the primary, secondary and [...]
Article
Keith A. Hobson, Auteur ;
Joseph R. Jehl, Auteur
Birds migrating annually to high-latitude breeding grounds may benefit from the transport of endogenous nutrient reserves that ultimately contribute to reproduction. Shorebirds represent a diverse group of Arctic breeders that typically arrive o[...]
Article
Elizabeth Yohannes, Auteur ;
Mihai Valcu, Auteur ;
Raymond W. Lee, Auteur ;
Bart Kempenaers, Auteur
Resources for egg production may come from body reserves stored before breeding ("capital breeders") or from food acquired at the breeding site ("income breeders"). Arctic migrants were long thought to be capital breeders, because they often arr[...]
Article
Mduduzi Ndlovu, Auteur ;
Graeme S. Cumming, Auteur ;
Philip A. R. Hockey, Auteur ;
Leo W. Bruinzeel, Auteur
Phenotypic flexibility during moult has never been explored in austral nomadic ducks. We investigated whether the body condition, organ (pectoral muscle, gizzard, liver and heart) mass and flight-feather growth Egyptian geese Alopochen aegyptiac[...]
Article
Vanessa B. Harriman, Auteur ;
Ray T. Alisauskas, Auteur
Past studies on the relationship between nest ectoparasites and avian fitness have been primarily limited to altricial hosts. Life history strategies of precocial and altricial birds vary considerably, limiting our ability to infer the effect of[...]
Article
Ismael Galvan, Auteur ;
Rob G. Bijlsma, Auteur ;
Juan J. Negro, Auteur ;
Manuel Jaren, Auteur ;
Juan Garrido-Fernandez, Auteur
Although it is recognized that certain environmental factors are important determinants of the expression of melanin-based traits, their influence in wild populations of animals is poorly known. One of these factors is the availability of amino [...]
Article
Jakub Kreisinger, Auteur ;
Pavel Munclinger, Auteur ;
Veronika Javurkova, Auteur ;
Tomáš Albrecht, Auteur
A method that was based on non-invasive sampling of genetic material was used to determine the rates of extra-pair paternity (EPP) and conspecific brood parasitism (CBP) in mallards. Maternal and offspring DNA were extracted from feathers in nes[...]
Article
Kirk W. Stodola, Auteur ;
Eric T. Linder, Auteur ;
David A. Buehler, Auteur ;
Kathleen E. Franzreb, Auteur ;
Daniel H. Kim, Auteur ;
Robert J. Cooper, Auteur
Biparental care is common in birds, with the allocation of effort being highly variable between the sexes. In most songbird species, the female typically provides the most care early in the breeding cycle with both parents providing care when pr[...]
Article
Miriam Liedvogel, Auteur ;
Ben C. Sheldon, Auteur
Studies of a range of taxa, including birds, have revealed latitudinal clines in allele length at the conserved Clock locus, a gene with known influences on behaviour and physiology. Such clines might reflect adaptation to seasonal variation, a [...]
Article
Olivier Gilg, Auteur ;
Hallvard Strom, Auteur ;
Adrian Aebischer, Auteur ;
Maria V. Gavrilo, Auteur ;
Andrei E. Volkov, Auteur ;
Cecilie Miljeteig, Auteur ;
Brigitte Sabard, Auteur
The post-breeding movements of three northeast Atlantic populations (north Greenland, Svalbard and Franz Josef Land) of the ivory gull Pagophila eburnea, a threatened high-Arctic sea-ice specialist, were studied between July and December 2007 us[...]
Article
Amy C. Driskell, Auteur ;
Richard O. Prum, Auteur ;
Stephen Pruett-Jones, Auteur
Genetic variation in the melanocortin-1 receptor (MC1R) locus is responsible for color variation, particularly melanism, in many groups of vertebrates. Fairy-wrens, Maluridae, are a family of Australian and New Guinean passerines with several in[...]
Article
Anton Antonov, Auteur ;
Bard G. Stokke, Auteur ;
Peter S. Ranke, Auteur ;
Frode Fossoy, Auteur ;
Arne Moksnes, Auteur ;
Eivin Roskaft, Auteur
There is at present considerable variation in the level of antiparasite defences among different host species of avian brood parasites, but in many potential hosts some individuals reject poorly matching parasite eggs. Here we present unique abs[...]
