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Documents disponibles écrits par cet auteur (6)
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Article
Thomas Bregnballe, Auteur ; Ole Thorup, Auteur ; Lars Bo Jacobsen, Auteur ; Jorgen Peter Kjeldsen, Auteur ; Mogens Hansen, Auteur
Article
Lars Bo Jacobsen, Auteur ; Monika Chrenkova, Auteur ; Peter Sunde, Auteur ; Martin Salek, Auteur ; Kasper Thorup, AuteurThe population of Little Owls in Denmark is close to extinction. The main cause is food limitation during the breeding season. Efforts to improve breeding success include providing breeding pairs with supplementary food and attempts to improve f[...]
Article
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[...]
Article
The Danish population of Little Owl Athene noctua has decreased rapidly during the past four decades. This paper describes the development of the breeding population in Vendsyssel and Himmerland in northern Jutland during 1981-2000, and gives de[...]
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Dorthe Pedersen, Auteur ; Kasper Thorup, Auteur ; Peter Sunde, Auteur ; Lars Bo Jacobsen, Auteur ; Carsten Rahbek, AuteurBefore dispersal, social and spatial behaviour in owls has only been briefly studied. We used radio tracking to monitor age-influenced social and spatial behaviour in 10 juvenile Little Owls (Athene noctua) from nests in Northern Jutland, Denmar[...]
Article
Kasper Thorup, Auteur ; Dorthe Pedersen, Auteur ; Peter Sunde, Auteur ; Lars Bo Jacobsen, Auteur ; Carsten Rahbek, AuteurSurvival rate is an essential component of population dynamics; therefore, identification of variation in mortality rates and the factors that influence them might be of key importance in understanding why populations increase or decrease. In De[...]
