Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2026
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The experiment aimed to investigate the effectiveness of a Monil virtual fence collar for small ruminants on mature Norwegian White ewes at the NIBIO Tjøtta station. The study aimed to evaluate the animals' learning ability and welfare, compare two auditory cues (Original vs. Modified; collar treatment), and examine the effects of wool (Shaved vs. Unshaved) on the efficacy of the virtual fence system. A total of 16 ewes were randomly assigned to two groups of 8, each equipped with one of the collars, and further divided based on wool treatment. Two mirrored training arenas were set up for the two groups. For two days, the collared animals had unrestricted access to graze the entire arena (VF-Off). This was followed by two days of restricted access to 2/3 of the arena using the virtual fence collars (VF-On). After the fourth day, the animals were switched to the other arena as a crossover design, and the sequence of VF-Off and VF-On was repeated. Data collected included position and cue logs from the virtual fence collars, heart rate monitors, and observation data gathered through three methods: Video Surveillance, Direct Observation Time Budget, and Pressure Marks Assessment. Our results indicate that the ewes were able to learn to avoid restricted zones effectively, relying more on auditory cues than on electrical cues. The virtual fence cueing imposed short-lived stress (acute stress), with both behavioral and physiological metrics returning to baseline levels within five minutes. Additionally, exclusively auditory cues resulted in less stress compared to cues associated with electrical stimulation. No indicators of chronic behavioral stress were observed. However, we found that the collars needed to move freely on the animals' necks to prevent pressure marks, suggesting that the ewes should be shaved around their necks before wearing the collars. While collar treatment showed no significant effects, wool treatment indicated that the shaved group was more compliant with the virtual fence system due to reduced insulation, which enhanced the effectiveness of electrical cues. During the deployment with the unshaved group, there were three instances in which the animals received an electrical cue that did not elicit the animal response, allowing for their “escape” over the virtual fence boundary. Therefore, equipping the virtual fence on shaved animals is paramount for enhancing the system's reliability. If the suggestion is followed, the system can effectively be used for sheep without compromising animal welfare.
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Denne rapporten oppsummerer Vesthjort prosjektet (2019-2025), hvor målet har vært å utvikle kunnskap om hjortens arealbruk på Søre Sunnmøre i Møre og Romsdal og Nordfjord i Vestland til grunnlag for hjorteforvaltningen i regionen. Rapporten oppsummerer resultatene fra prosjektet og diskuterer disse i lys av hjorteforvaltningen.
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Forfattere
Björn H. Franke Aafke M. Schipper Tal Avgar Luca Börger Nilanjan Chatterjee Thomas Müller Brian J. Smith Briana Abrahms Abdullahi H. Ali Nina Attias Hattie L. A. Bartlam‐Brooks Floris M. van Beest Jerrold L. Belant Dean E. Beyer Niels Blaum Michael B. Brown Bayarbaatar Buuveibaatar Francesca Cagnacci Simon Chamaillé‐Jammes Nandintsetseg Dejid Jasja Dekker Arnaud L. J. Desbiez Julian Fennessy Christina Fischer Ilya Fischhoff Adam T. Ford Benedikt Gehr Jacob R. Goheen Ronaldo Gonçalves Morato Mark Hebblewhite Robert Hering Marco Heurich A. J. Mark Hewison Lynne A. Isbell Matthew Kauffman Andrew Jakes René Janssen Paul F. Jones Bob Jonge Poerink Clayton Lamb John Durrus Linnell A. Catherine Markham Courtney J. Marneweck Jenny Mattisson John McEvoy Erling Meisingset Evelyn Merrill Guilherme de Miranda Mourão Bram Van Moorter Nicolas Morellet Atle Mysterud John Odden Kirk A. Olson Agustín Paviolo Tyler Petroelje Kelly M. Proffitt Kasim Rafiq Nathan Ranc Christer Moe Rolandsen Daniel I. Rubenstein Sonia Saïd Hall Sawyer Niels Martin Schmidt Nuria Selva Agnieszka Sergiel Erling Johan Solberg Melissa Songer Jonas Stiegler Olav Strand Siva Sundaresan Jeffrey J. Thompson Wiebke Ullmann Dorj Usukhjargal Ulrich Voigt Filip Zięba Tomasz Zwijacz‐Kozica Mark A. J. Huijbregts Marlee A. TuckerSammendrag
Aim Animal movements are a fundamental process affecting communities and ecosystems. Quantifying habitat selection across species and habitats is key for understanding how animals respond to environmental change. Currently, we lack comparative studies that examine how habitat selection varies across species traits and landscapes. We aim to quantify global patterns of habitat selection to help understand the fundamental drivers of movement behaviour. Location Global. Time Period Contemporary. Major Taxa Studied Terrestrial mammals. Methods We estimated selection coefficients for terrain ruggedness, vegetation productivity, human population density and distance to roads of individual terrestrial mammals through step‐selection analysis of 1344 GPS tracks across 48 species. We quantified intra‐ and interspecific variation and tested whether selection coefficients were associated with species traits and habitat availability. Results We observe an overall avoidance of roads and areas of high human population density as well as rugged terrain, with a large proportion of individuals selecting for areas of intermediate NDVI. However, we also found large intraspecific variation in habitat selection and show that this variation is predicted by local and landscape‐level environmental conditions rather than species traits. Individuals in more remote areas exhibited weaker functional responses to human presence than those in more disturbed areas. Avoidance of rugged terrain is also context‐dependent, with stronger avoidance when local ruggedness is high. The only exception to the observed intraspecific variability is consistent species‐level responses to road proximity. Main Conclusions Our findings contribute to the understanding of habitat selection by terrestrial mammals, showing that selection is largely shaped by environmental conditions and that animals exhibit high plasticity in their responses. Our results also provide further evidence for the significant impact of roads on animal movement. These insights can help us to understand the potential effects of environmental change on the behaviour of mammal species around the world.
Forfattere
Jutta KapferSammendrag
Nedgangen i aktive gårdsbruk i Troms har ført til at tidligere dyrkede arealer gror igjen. Slått av disse områdene kan bidra til å stanse gjengroingen, samtidig som pellets produsert fra plantematerialet kan være et bærekraftig supplement til vinterfôring av rein i perioder med beitekrise.
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Bruk av teknologi i utmarksnæringene
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Gabriela WagnerSammendrag
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