| Titre : | Journal of Avian Biology 38(1) - JAN 2007 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Henricus H. van Kleef, Auteur ;
Frank Willems, Auteur ;
Andrei E. Volkov, Auteur ;
Joseph J. H. R. Smeets, Auteur ;
Damian Nowak, Auteur ;
Agnieszka Nowak, Auteur
Several studies have demonstrated that snowy owls Nyctea scandiaca defend an area around their nests against predators, hereby inadvertently creating safe havens for breeding dark-bellied brent geese Branta b. bernicla. However, studies investig[...]
Article
Renee D. Godard, Auteur ;
Bonnie B. Bowers, Auteur ;
C. Morgan Wilson, Auteur
Chemodetection of common nest predators may be advantageous for nesting birds; however, few studies have examined the ability of songbirds to detect chemical odors from predators. Thus, in 2002, we presented eastern bluebirds Sialia sialis with [...]
Article
Emily R. A. Cramer, Auteur ;
J. Jordan Price, Auteur
Physical constraints on animal signals can have important consequences for communication. For bird songs that include a trill, performance is physically constrained by a trade-off between the rate at which notes are repeated in the trill and the[...]
Article
Beata Szigeti, Auteur ;
János Török, Auteur ;
Gergely Hegyi, Auteur ;
Balazs Rosivall, Auteur ;
Rita Hargitai, Auteur ;
Eszter Szollosi, Auteur ;
Gabor Michl, Auteur
Components of avian egg quality often show remarkable variation between females and yet the causes of variation in this fitness-related trait remain poorly understood. We investigated the egg size and yolk carotenoid investment of blue tit Parus[...]
Article
Maria I. Bogdanova, Auteur ;
Ruedi G. Nager, Auteur ;
Pat Monaghan, Auteur
The quality of conditions provided by avian parents will have consequences for both parental and offspring fitness. While many components of avian reproduction appear to vary with parental age, the effect of age on incubation has largely been ig[...]
Article
Jonathan Bart, Auteur ;
STEPHEN Brown, Auteur ;
Brian Harrington, Auteur ;
R. I. Guy Morrison, Auteur
We analyzed data from two surveys of fall migrating shorebirds in central and eastern North America to estimate annual trends in means per survey and to determine whether trends indicate a change in population size or might have been caused by o[...]
Article
Mikael Akesson, Auteur ;
Staffan Bensch, Auteur ;
Dennis Hasselquist, Auteur
We present estimates of standardized selection (directional and quadratic) differentials via reproductive success on eight morphological traits in a newly founded long-term study population of great reed warblers Acrocephalus arundinaceus in Swe[...]
Article
Viviane Henaux, Auteur ;
Thomas Bregnballe, Auteur ;
Jean-Dominique Lebreton, Auteur
While the factors influencing reproduction and survival in colonial populations are relatively well studied, factors involved in dispersal and settlement decisions are not well understood. The present study investigated exchanges of great cormor[...]
Article
Paul G. McDonald, Auteur ;
Catherine F. Heathcote, Auteur ;
Michael F. Clarke, Auteur ;
Jonathan Wright, Auteur ;
Anahita J. N. Kazem, Auteur
Acoustically-mediated individual discrimination has been the focus of much investigation in ornithology. For cooperatively breeding species, strong selection pressure favouring individual recognition during acts of altruism is predicted under ma[...]
Article
Sigrunn Eliassen, Auteur ;
Per Wegge, Auteur
During the breeding season, adult male capercaillies Tetrao urogallus display on leks in the early morning. During the day, they occupy more or less exclusive home ranges within 1 km of the lekking ground, but little is known about their movemen[...]
Article
Frans A. Juola, Auteur ;
Donald C. Dearborn, Auteur
Article
Colby R. Neuman, Auteur ;
Rebecca J. Safran, Auteur ;
Irby J. Lovette, Auteur
In the socially monogamous barn swallow, previous studies of individuals in the European subspecies Hirundo r. rustica have shown that a male's tail streamer length is under strong sexual selection and is positively associated with several measu[...]
Article
Tiffany M. Shepherd, Auteur ;
Kevin J. Burns, Auteur
The summer tanager Piranga rubra is a Neotropical migrant that has experienced noted declines in the southwestern United States caused by extensive habitat loss of native riparian woodlands. This species is composed of two morphologically and be[...]
Article
Dave Shutler, Auteur ;
Adam A. Campbell, Auteur
Several bird species, including cavity-nesters such as European starlings Sturnus vulgaris, add to their nests green sprigs of plants such as yarrow Achillea millefolium that are rich in volatile compounds. In this field study on another cavity-[...]
