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Documents disponibles écrits par cet auteur (8)
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Article
Dina Abdelhafez Ali Mostafa, Auteur ; Mikkel Willemoes, Auteur ; Volker Salewski, Auteur ; Troels Eske Ortvad, Auteur ; Torben Dabelsteen, Auteur ; Kasper Thorup, AuteurIn migratory birds, constraints due to breeding are relaxed during the non-breeding season and thus, social behaviours and spatial associations are potentially more directly coupled to food resources and habitats. Use of space and territorial be[...]
Article
Hans Meltofte, Auteur ; Frank Riget, Auteur ; Benny Gert Hansen, Auteur ; Torben Dabelsteen, AuteurStrodam Reserve was established in 1925 in the most southwesterly part of Grib Forest in NE Zealand. The reserve consists predominantly of deciduous forest that has remained largely untouched for the last 60-70 years. In the southernmost part of[...]
Article
Nana Hesler, Auteur ; Roger Mundry, Auteur ; Torben Dabelsteen, AuteurBird song is thought to have a function in both inter- and intra-sexual contexts with song complexity serving as an honest signal of male quality. Theory predicts that males use repertoire sizes to estimate rivals' fighting ability. Here we test[...]
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Nicholas Per Huffeldt, Auteur ; Torben Dabelsteen, AuteurLow-frequency ambient noise is known to cause shifts in the song frequency of different species of songbirds, such as the Great Tit (Parus major). The present study was conducted to test the generality of these findings by measuring the distribu[...]
Article
Angelika Poesel, Auteur ; Torben Dabelsteen, Auteur ; Simon Boel Pedersen, AuteurCommunication among animals often comprises several signallers and receivers within the signal's transmission range. In such communication networks, individuals can extract information about differences in relative performance of conspecifics by[...]
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Lars Bo Jacobsen, Auteur ; Torben Dabelsteen, AuteurAcoustic signals are important communication means in birds, especially in nocturnal owls where calls may constitute the only option for individual recognition. Studies of a number of owl species have now confirmed that their territorial calls a[...]
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Lars B. Jacobsen, Auteur ; Peter Sunde, Auteur ; Carsten Rahbek, Auteur ; Torben Dabelsteen, Auteur ; Kasper Thorup, AuteurWith the aim of quantifying spatio-temporal and social factors affecting territorial calls in Little Owls, we collected data on the calling behaviour of radio tracked individuals from a low-density population in Northern Jutland, Denmark. There [...]
Article
Angelika Poesel, Auteur ; Torben Dabelsteen, Auteur ; Safi-Kirstine Darden, Auteur ; Kaspar Delhey, Auteur ; Anne Peters, AuteurMultiple phenotypic traits can affect the outcome of interactions among territorial animals. Individuals may use current and previously acquired information on phenotypic traits to assess the competitive ability of opponents and adjust the stren[...]
