| Titre : | Journal of Avian Biology 39(1) - JAN 2008 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Lucyna Halupka, Auteur ;
Andrzej Dyrcz, Auteur ;
Marta Borowiec, Auteur
Between 1970 and 2006 reed warblers Acrocephalus scirpaceus started breeding progressively earlier; both the initiation of breeding (the earliest first egg dates) and peak of breeding (median first egg dates) advanced. Median first egg dates cor[...]
Article
Anthony D. Fox, Auteur ;
Poul Hartmann, Auteur ;
Ib K. Petersen, Auteur
The "cost-benefit" hypothesis states that avian body organs show mass changes consistent with the trade-off between their functional importance and maintenance cost, which may vary throughout the annual cycle. Flightless moulting common scoter M[...]
Article
Lauryn Benedict, Auteur
Vocal duetting, where two birds produce temporally coordinated vocalizations, has been reported in a taxonomically and geographically diverse set of avian species. Researchers have suggested a number of potential correlates of duetting, includin[...]
Article
Mick Marquiss, Auteur ;
Keith A. Hobson, Auteur ;
Ian Newton, Auteur
We used the stable isotope composition of body feathers to show the extraordinarily varying regional provenance of an irruptive conifer seed specialist, the common crossbill Loxia curvirostra. In the boreal region of the western Palearctic, this[...]
Article
José L. Greño, Auteur ;
Eduardo J. Belda, Auteur ;
Emilio Barba, Auteur
Survival during the first year is one of the most important factors determining fitness in birds. Birds have poor thermoregulatory abilities during the nestling period when the plumage is not fully developed, thus temperature during the nestling[...]
Article
It has been hypothesized that variation (e.g., of repertoire elements) in prolonged vocalization sessions of passerine birds can serve to minimize habituation by conspecifics. The repertoire of vocalization types limited in suboscine passerines,[...]
Article
Display flight in collared doves Streptopelia decaocto consists of a rapid ascent from a perch, followed by a glide back to the same or near-by perch. The hypothesis that ascending flight presents an honest signal of the maximum power generating[...]
Article
Michael Raess, Auteur
Migration speed in passerines is generally assumed to be higher in spring than in autumn. So far this has been only shown for the western Palaearctic-Afrotropic migration system. I compiled published records of the movements of Siberian stonecha[...]
Article
Cornelis Swennen, Auteur ;
Yat-tung Yu, Auteur
We analysed the hypothesis of Weihs and Katzir (1994) that feeding spoonbills use their broad bills by sweeping it through the water to shed a vortex. This would result in a hydrodynamic suction on the bottom for catching prey immediately or dur[...]
Article
Pim Edelaar, Auteur
Compared to most other birds, the taxonomy of crossbills (Loxia) is still highly unsettled. However, much progress seems to be achievable when data on vocalisations is included. In a recent paper, Summers et al. (2007) argued that strong assorta[...]
Article
Daniel Weihs, Auteur ;
Gadi Katzir, Auteur
Article
Norbert Duda, Auteur ;
Wlodzimierz Chetnicki, Auteur ;
Peter Waldeck, Auteur ;
Malte Andersson, Auteur
Social monogamy with biparental care is the norm in gulls Laridae, but egg colour variation suggests that some nests may contain mixed clutches laid by more than one female. Here we use protein fingerprinting of egg albumen to assess the occurre[...]
Article
Masayo Soma, Auteur ;
Toshikazu Hasegawa, Auteur ;
Kazuo Okanoya, Auteur
Recent studies of the vocal mechanisms of songbirds have shown that there are physical effects on sound production. Interspecific and phylogenetic comparisons have shown that body mass and bill morphology are two major factors affecting vocaliza[...]
Article
Jordan Karubian, Auteur
In many animals, an individual's social environment and status can change quickly and unpredictably, suggesting an advantage for signals capable of responding to these changes. However, many signaling traits are fixed for relatively long periods[...]
Article
Sharon E. Lynn, Auteur ;
Anthony J. Porter, Auteur
In response to a variety of unpredictable conditions, birds secrete the steroid hormone corticosterone, which has numerous effects on physiology and behavior. A standardized protocol of handling and restraint has been demonstrated to elicit a ro[...]
Article
Cas Eikenaar, Auteur ;
David S. Richardson, Auteur ;
Lyanne Brouwer, Auteur ;
Jan Komdeur, Auteur
The distances that individuals disperse, from their natal site to the site of first breeding and between breeding sites, have important consequences for the dynamics and genetic structure of a population. Nearly all previous studies on dispersal[...]
Article
Pim Edelaar, Auteur ;
Kees van Eerde, Auteur ;
Kees Terpstra, Auteur
Vocally differentiated common crossbill Loxia curvirostra populations ('vocal types') in North America show a high degree of morphological and ecological specialization coupled with significant genetic differentiation and appreciable levels of a[...]
Article
Iain A. Woxvold, Auteur ;
Raoul A. Mulder, Auteur
In cooperatively breeding apostlebirds Struthidea cinerea philopatry by both sexes is coupled with low levels of dispersal, resulting in large groups (up to 17 birds) that may include multiple males and females of varying age and relatedness. We[...]
Article
Peter O. Dunn, Auteur ;
Linda A. Whittingham, Auteur ;
Corey R. Freeman-Gallant, Auteur ;
Jonathan DeCoste, Auteur
We used controlled aviary experiments to study the role of male ornaments in male-male competition and female choice in the common yellowthroat Geothlypis trichas, a sexually dichromatic warbler. Previous aviary studies in Wisconsin, USA, indica[...]
