| Titre : | Journal of Ornithology 152(2) - APR 2011 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Benoit Sittler, Auteur ;
Adrian Aebischer, Auteur ;
Olivier Gilg, Auteur
The Long-tailed Skua (Stercorarius longicaudus) is a specialist predator of lemmings during the summer and hence an important component of the tundra ecosystems, but most of its life cycle takes place offshore and remains largely unknown outside[...]
Article
Andreas Daenhardt, Auteur ;
Tido Fresemann, Auteur ;
Peter H. Becker, Auteur
Prey availability to seabirds has a profound influence on individual decisions about allocating somatic and reproductive investment. These decisions can be expressed in foraging behavior and prey utilization and have consequences for establishin[...]
Article
Szilvia Kovacs, Auteur ;
Tibor Csoergoe, Auteur ;
Andrea Harnos, Auteur ;
Peter Fehervari, Auteur ;
Krisztina Nagy, Auteur
The distribution area and the timing of migration of many bird species have recently changed, presumably due to climatic factors. In our study, we estimated the effect of climate change on migration phenology and biometrics of two sister Sylvia [...]
Article
Ulf Bauchinger, Auteur ;
Scott R. McWilliams, Auteur ;
Harald Kolb, Auteur ;
Vladimir M. Popenko, Auteur ;
Edwin R. Price, Auteur ;
Herbert Biebach, Auteur
The pectoral muscle is the biggest organ within a passerine bird. It provides flight locomotion and is known to act as a protein source during periods with increased protein demands or decreased protein availability. The mass of the flight muscl[...]
Article
Annual adult survival in several new world passerine birds based on age ratios in museum collections
Robert E. Ricklefs, Auteur ;
Toshi Tsunekage, Auteur ;
Russell E. Shea, Auteur
We estimated annual survival from proportions of first-year and older birds in museum collections of several species of North American and Neotropical passerine birds (Order Passeriformes). The quality of estimates of survival from museum specim[...]
Article
Pascaline Le Gouar, Auteur ;
Justine Sulawa, Auteur ;
Sylvain Henriquet, Auteur ;
Christian Tessier, Auteur ;
Francois Sarrazin, Auteur
The Griffon Vulture (Gyps fulvus) is considered to be socially monogamous. However, extra-pair fertilizations are suspected due to observations of extra-pair copulations in some populations. We performed parentage studies based on ten polymorphi[...]
Article
Wolfgang M. Schleidt, Auteur ;
Erhard Oeser, Auteur
Two hundred reels of 16-mm film, containing records of a variety of behavior patterns, mostly of dabbling ducks and geese, were discovered in the spring of 2010 in the attic of the Lorenz mansion in Altenberg--original footage, most of them take[...]
Article
Marcela Suarez-Rubio, Auteur ;
Peter Leimgruber, Auteur ;
Swen C. Renner, Auteur
Exurban development is an accelerating land use trend in the United States with new housing units emerging in formerly closed forests. Conservation practitioners and planners suspect exurban development alters ecological processes and biodiversi[...]
Article
Beata Matysiokova, Auteur ;
Vladimir Remes, Auteur
Individuals differ in their ability to cope with energetically demanding situations while caring for the current brood, and they can signal this ability by their colouration. We examined the impact of handicapping (clipping of wing and tail feat[...]
Article
Piotr Tryjanowski, Auteur ;
Tim H. Sparks, Auteur ;
Marcin Bocheński, Auteur ;
Miroslawa Dabert, Auteur ;
Mariusz Kasprzak, Auteur ;
Piotr Kaminski, Auteur ;
Slawomir Mroczkowski, Auteur ;
Ewa Wisniewska, Auteur ;
Leszek Jerzak, Auteur
Sex allocation has been a fertile topic in the development of evolutionary theory. The dominant models for vertebrates have provided predictions of sex ratios based on asymmetry in breeding success between sexes and the relative effect of local [...]
Article
More than 100 species of tropical birds track army ants to feed on arthropods that flee from the ants. Some species are obligate ant-followers that obtain most of their food at ant swarms, but the mechanism used to track ant colonies remains poo[...]
Article
Heiko Schmaljohann, Auteur ;
Philipp J. J. Becker, Auteur ;
Hakan Karaardic, Auteur ;
Felix Liechti, Auteur ;
Beat Naef-Daenzer, Auteur ;
Celia Grande, Auteur
Stopover studies have concentrated so far mostly on mechanisms regulating the temporal organisation on the day-to-day level. Taking advantage of the small and isolated island of Helgoland in the North Sea, we investigated the stopover and depart[...]
Article
Catalina Serra, Auteur ;
Gustavo J. Fernández, Auteur
Breeding birds often give alarm calls when a predator is near the nest. These calls have been proposed to serve as distraction displays for the predator, alerts for a mate conveying information about the presence of a threat, or a warning for ne[...]
Article
Thomas K. Gottschalk, Auteur ;
Falk Huettmann, Auteur
Distance sampling (DS) and territory mapping (TM) are globally applied bird survey techniques. However, specifically designed studies comparing results of both methods in different habitats in the framework of a scientific experiment have rarely[...]
Article
Jose Hernan Sarasola, Auteur ;
Juan Jose Negro, Auteur ;
Marc Joseph Bechard, Auteur ;
Agustin Lanusse, Auteur
Many of the mechanisms involved in visual signalling in birds are based on pigment-based plumage ornamentation and colouration rather than the expression of other, non-plumage-based displays. We have analysed the colouration of the tarsi and cer[...]
Article
Min Wei, Auteur ;
Huw Lloyd, Auteur ;
Yanyun Zhang, Auteur
Neighbour-stranger discrimination has been demonstrated in many taxa, but the mechanism employed in discrimination varies across species. We tested whether an oscine bird with a small repertoire size, the Yellow-bellied Tit Parus venustulus, dis[...]
Article
Bo Soderstrom, Auteur ;
Henrik Karlsson, Auteur
In Sweden, the centre of distribution of the nationally red-listed Red-backed Shrike Lanius collurio has shifted from farmland landscapes to forest landscapes from the 1960s until today. In this study, reproductive performance of Red-backed Shri[...]
Article
Andrew Legault, Auteur ;
Vivien Chartendrault, Auteur ;
Joern Theuerkauf, Auteur ;
Sophie Rouys, Auteur ;
Nicolas Barré, Auteur
Habitat studies are important for conservation, particularly for parrots, as many are threatened and their ecological requirements are often poorly known. Our aim was to contribute to the conservation of parrots in New Caledonia by examining the[...]
Article
Laura C. Bouchard, Auteur ;
Matthew J. Anderson, Auteur
This observational study of captive Caribbean Flamingos (Phoenicopterus ruber) sought to investigate the possible functions of unipedal and bipedal resting. In particular, this research sought to further examine the possibility that thermoregula[...]
Article
Julia Delingat, Auteur ;
Keith A. Hobson, Auteur ;
Volker Dierschke, Auteur ;
Heiko Schmaljohann, Auteur ;
Franz Bairlein, Auteur
Linking events of breeding, wintering and stopover areas has important ecological and conservation implications for migratory species. To find a tool to connect these different events in a long-distance migrating songbird, the Northern Wheatear [...]
Article
Caroline Frey, Auteur ;
Caroline Sonnay, Auteur ;
Amelie Dreiss, Auteur ;
Alexandre Roulin, Auteur
Intensification of farming over the past 50 years has homogenised the landscape structure and contributed to the decline of bird populations in Europe. To better target the conservation of the Barn Owl Tyto alba, we assessed the influence of the[...]
Article
Blackcap Sylvia atricapilla numbers, phenology and reproduction in a primeval forest-a 33-year study
Data on Blackcaps Sylvia atricapilla gathered in 1975-2007 in an old-growth primeval forest (BiaowieA1/4a National Park, Poland) are analysed to see whether the species numbers, breeding phenology or reproduction showed any long-term trends. Nei[...]
Article
Leandro Bugoni, Auteur ;
Kate Griffiths, Auteur ;
Robert W. Furness, Auteur
Skewed adult sex ratio (ASR) has been proposed as a common pattern in birds, frequently biased towards males and with larger biases in globally threatened species. In albatrosses and petrels, it has been suggested that differential mortality of [...]
Article
Chen Yang, Auteur ;
Yun Fang, Auteur ;
Yue-Hua Sun, Auteur
Winter movement and social behavior of Chinese Grouse (Bonasa sewerzowi) were studied at Lianhuashan Natural Reserve, northwest China from 1995 to 2009. According to radio-tracking data from 25 male Chinese Grouse, their home ranges in winter ra[...]
Article
Rafael Maia, Auteur ;
Regina H. Macedo, Auteur
Colors in feathers are produced by pigment deposition or by nanostructures within barbs or barbules. In the absence of pigments or nanostructures, light is scattered incoherently, producing white coloration. Honest advertisement models predict t[...]
Article
Social monogamy is common among birds, while genetic monogamy is supposed to be rare. I have investigated the genetic mating system of the Black-headed Gull Larus ridibundus in which, as in seabirds and most other long-lived and socially monogam[...]
Article
Maria Laura Chazarreta, Auteur ;
Valeria Susana Ojeda, Auteur ;
Ana Trejo, Auteur
Detailed studies of parental care of woodpeckers are restricted to a handful of species in the northern hemisphere. The Magellanic Woodpecker Campephilus magellanicus is the largest Neotropical picid and the southernmost distributed woodpecker w[...]
Article
Jose Alfredo Castillo-Guerrero, Auteur ;
Eric Mellink, Auteur
Labor division in parental care and reduction of inter-sex competition by division of the foraging niche have been suggested as part of the evolutionary basis for reversed sexual size dimorphism in boobies (Sulidae). To test the potential viabil[...]
Article
Niels Krabbe, Auteur ;
Mery Juina, Auteur ;
Aldo Fernando Sornoza, Auteur
The Pale-headed Brush-finch Atlapetes pallidiceps is an emberizine finch that is confined to south-central Ecuador and critically endangered owing to cowbird parasitism and habitat loss. We report a marked increase in numbers of brush-finches af[...]
Article
Julie Bugge, Auteur ;
Robert T. Barrett, Auteur ;
Torstein Pedersen, Auteur
The Norwegian population of the Common Guillemot Uria aalge has declined by > 95% since the 1960s, and is classified as critically endangered in the Norwegian Red List. Much of the recent decline has been attributed to reduced food availability,[...]
Article
Ismael Galvan, Auteur
The expression of structural plumage colours (i.e. those generated by feather microstructures) often acts as a signal of quality, but the signal content of these traits remains relatively unknown. However, a hypothesis posits that the production[...]
Article
Feeding and nesting requirements of the critically endangered Mangrove Finch Camarhynchus heliobates
Birgit Fessl, Auteur ;
Abraham D. Loaiza, Auteur ;
Sabine Tebbich, Auteur ;
H. Glyn Young, Auteur
The critically endangered Mangrove Finch (Camarhynchus heliobates) is a habitat specialist restricted to mangroves, with a global population size of about 100 individuals. Due to its extremely limited geographic range and low dispersal capabilit[...]
Article
Sexually selected, elongated tails in birds may impair or alter naturally selected functions related to flight. The aim of this study was to test whether experimental manipulation of tail length affected the kinematics of a low-speed escape mane[...]
