Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2013
Authors
Christian PedersenAbstract
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2012
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Authors
Jonathan Edward Colman Diress Tsegaye Alemu Christian Pedersen Ruben Eidesen Herbjørg Arntsen Øystein Holand Alex Mann Eigil Reimers Stein Ragnar MoeAbstract
Interspecific interaction among sympatric ungulates is important in management and conservation. We investigated behavioral interference between sympatric wild or semidomestic reindeer (Rangifer tarandus tarandus) and sheep (Ovis aries) in two field studies and one enclosure experiment. For free-ranging wild and semidomestic reindeer, interference between the two species increased with decreasing distances, occurring only at less than 200 m and 30 m, for wild and semidomestic reindeer, respectively, and neither species consistently dominated the other. In a controlled, duplicated experiment we tested interference and confrontations at the feeding patch level among semidomestic reindeer and sheep within 40 × 50 m enclosures. When new reindeer or sheep were introduced into enclosures already occupied by reindeer, new reindeer resulted in significantly more interference and confrontations among individuals compared to new sheep; i.e., intraspecific interference was more prevalent than interspecific interference at equal densities. For all study areas, confrontations decreased with time after “first encounter,” indicating cohabituation. A sympatric use of pastures was not visually disruptive for recorded grazing behavior for either species.
Authors
Gisela Lüscher Michaela Arndorfer Katalin Balázs K.G. Bernhardt M. Bogers R.G.H. Bunce J.-P. Choisis Peter Dennis Wenche E. Dramstad Sebastian Eiter Gunnar Engan Wendy Fjellstad T. Frank Jürgen Friedel Ilse Geijzendorffer P. Gillingham Felix Herzog K.-J. Hülsbergen Philippe Jeanneret G. Jerkovich Rob Jongman Maximilian Kainz M.L. Oschatz Susanne Papaja-Hülsbergen Philippe Pointereau Jean-Pierre Sarthou M.K. Schneider Norman Siebrecht Sebastian WolfrumAbstract
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Abstract
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