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Article
Fraenzi Korner-Nievergelt, Auteur ; Ommo Hueppop, AuteurPublishing ornithological data requires the application of adequate statistical methods. With the improvement of methods, software requirements are arising, but available proprietary programs are often far beyond the financial limits of the user[...]
Article
Fraenzi Korner-Nievergelt, Auteur ; Michael Schaub, Auteur ; Kasper Thorup, Auteur ; Michael Vock, Auteur ; Wojciech Kania, AuteurCapsule The division coefficient is an estimate of the proportion of ringed birds migrating to different destination areas taking into account area-specific re-encounter probabilities. Aims To explore precision and bias of the division coefficie[...]
Article
Fraenzi Korner-Nievergelt, Auteur ; Josef Hofer, Auteur ; Annette Sauter, Auteur ; Lukas Jenni, AuteurDans Wildfowl (2 2009)Within-winter movements of birds are of interest for the identification of sub-populations and for the assessment of the risk of bird-transmitted diseases. The probability of a Tufted Duck Aythya fuligula or a Common Pochard A. ferina wintering [...]
Article
Fraenzi Korner-Nievergelt, Auteur ; Edi Baader, Auteur ; Luzius Fischer, Auteur ; Werner Schaffner, Auteur ; Pius Korner-Nievergelt, Auteur ; Matthias Kestenholz, AuteurWe compared age composition, and three morphological variables (feather length, body mass, fat class) between birds caught at a ringing station during irruption years with birds caught during years with relatively few migrants for the Coal Tit, [...]
Article
Fraenzi Korner-Nievergelt, Auteur ; Pius Korner-Nievergelt, Auteur ; Edi Baader, Auteur ; Luzius Fischer, Auteur ; Werner Schaffner, Auteur ; Matthias Kestenholz, AuteurWe analysed the number of autumn migrants at a bird ringing station over
Article
Annette Sauter, Auteur ; Fraenzi Korner-Nievergelt, Auteur ; Lukas Jenni, AuteurOther than during periods of migration, animal movement tends to be poorly described, despite the potential importance of such movements, which may prove crucial for surviving periods of bad weather and low food availability. We analysed within-[...]
Article
Fraenzi Korner-Nievergelt, Auteur ; Annette Sauter, Auteur ; Philip W. Atkinson, Auteur ; Jerome Guelat, Auteur ; Wojciech Kania, Auteur ; Marc Kéry, Auteur ; Ulrich Koeppen, Auteur ; Robert A. Robinson, Auteur ; Michael Schaub, Auteur ; Kasper Thorup, Auteur ; Henk van der Jeugd, Auteur ; Arie J. van Noordwijk, AuteurRing re-encounter data, in particular ring recoveries, have made a large contribution to our understanding of bird movements. However, almost every study based on ring re-encounter data has struggled with the bias caused by unequal observer dist[...]
Article
Fraenzi Korner-Nievergelt, Auteur ; Felix Liechti, Auteur ; Steffen Hahn, AuteurThe large databases on ring reencounters, e.g. Euring database, contain extant information on the spatial distribution and potentially, on migratory connectivity of birds. However, reencounter data are normally sparse due to low reencounter prob[...]
Article
Jean-Luc Zollinger, Auteur ; Simon Birrer, Auteur ; Niklaus Zbinden, Auteur ; Fraenzi Korner-Nievergelt, AuteurThe Europe-wide decline in the populations and diversity of farmland birds has not been stopped despite dedicated conservation efforts such as agri-environment schemes (AES). The main reason for the lack of success of AES is considered to be the[...]
Article
Anja Bock, Auteur ; Beat Naef-Daenzer, Auteur ; Herbert Keil, Auteur ; Fraenzi Korner-Nievergelt, Auteur ; Marco Perrig, Auteur ; Martin U. Grueebler, AuteurRoost site selection is a state-dependent process, affected by the individual's costs and benefits of roosting at a specific site in the available environment. Costs and benefits of different roost sites vary in relation to intrinsic factors and[...]
Article
Felix Liechti, Auteur ; Chiara Scandolara, Auteur ; Diego Rubolini, Auteur ; Roberto Ambrosini, Auteur ; Fraenzi Korner-Nievergelt, Auteur ; Steffen Hahn, Auteur ; Roberto Lardelli, Auteur ; Maria Romano, Auteur ; Manuela Caprioli, Auteur ; Andrea Romano, Auteur ; Beatrice Sicurella, Auteur ; Nicola Saino, AuteurWe investigated sex- and year-dependent variation in the temporal and spatial movement pattern of barn swallows Hirundo rustica during the non-breeding period. Hundred and three individuals equipped with miniaturized light-level geolocators at t[...]
Article
Irene Keller, Auteur ; Fraenzi Korner-Nievergelt, Auteur ; Lukas Jenni, AuteurWaterbirds are often observed to move between different wintering sites within the same winter-for example, in response to food availability or weather conditions. Within-winter movements may contribute to the spreading of diseases, such as avia[...]
