Browsing NTNU Open by Author "Øien, Ingar Jostein"
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Effects of satellite transmitters on survival in Snowy Owls Bubo scandiacus
Heggøy, Oddvar; Aarvak, Tomas; Øien, Ingar Jostein; Jacobsen, Karl-Otto; Solheim, Roar; Zazelenchuk, Dan; Stoffel, Marten; Kleven, Oddmund (Journal article; Peer reviewed, 2017)The use of tracking devices to monitor birds is extensive, but the effects of such instruments on equipped individuals are still insufficiently taken into account. Here we evaluate potential effects of backpack-mounted ... -
Home range and excursive post-breeding movements of Eurasian Eagle-owls revealed by GPS satellite transmitters
Heggøy, Oddvar; Aarvak, Tomas; Ranke, Peter Sjolte; Solheim, Roar; Øien, Ingar Jostein (Peer reviewed; Journal article, 2021)Investigating space use of wild birds provides important knowledge of bird behavior and ecology, which is crucial in the management and conservation of threatened species. In the present study, we used GPS satellite telemetry ... -
Interspecific competition impacts the occupancy and range limits of two ptarmigan species along the elevation gradient in Norway
Mandeville, Caitlin Marie; Finstad, Anders Gravbrøt; Kålås, John Atle; Stokke, Bård Gunnar; Øien, Ingar Jostein; Nilsen, Erlend Birkeland (Peer reviewed; Journal article, 2024)Many mountain species are expected to respond to climate change through upslope shifts of their range limits, but competition may restrict or alter this response. Under traditional range-limit theory, it is expected that ... -
Legacy and emerging organohalogenated compounds in feathers of Eurasian eagle-owls (Bubo bubo) in Norway: Spatiotemporal variations and associations with dietary proxies (δ13C and δ15N)
Monclús, Laura; Løseth, Mari Engvig; Dahlberg Persson, Marie Johanne; Eulaers, Igor; Kleven, Oddmund; Covaci, Adrian; Benskin, Jonathan P.; Awad, Raed; Zubrod, Jochen P.; Schulz, Ralf; Wabakken, Petter; Heggøy, Oddvar; Øien, Ingar Jostein; Steinsvåg, Magnus Johan; Jaspers, Veerle; Nygård, Torgeir (Peer reviewed; Journal article, 2021)The occurrence of organohalogenated compounds (OHCs) in wildlife has received considerable attention over the last decades. Among the matrices used for OHCs biomonitoring, feathers are particularly useful as they can be ... -
A Spatial Modeling Framework for Monitoring Surveys with Different Sampling Protocols with a Case Study for Bird Abundance in Mid-Scandinavia
Sicacha, Jorge; Pavòn-Jordàn, Diego; Steinsland, Ingelin; May, Roelof Frans; Stokke, Bård Gunnar; Øien, Ingar Jostein (Peer reviewed; Journal article, 2022)Quantifying the total number of individuals (abundance) of species is the basis for spatial ecology and biodiversity conservation. Abundance data are mostly collected through professional surveys as part of monitoring ...