Browsing Brage NMBU by Author "Selås, Vidar"
Now showing items 1-15 of 15
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Annual change in forest grouse in southern Norway: variation explained by temperatures, bilberry seed production and the lunar nodal phase cycle
Selås, Vidar (Journal article; Peer reviewed, 2019)Forage quality is rarely the focus of studies on grouse performance. The plant stress hypothesis predicts that the protein digestibility of a focal food plant for grouse in Norway, the bilberry Vaccinium myrtillus should ... -
Bilberry seed production explains spatiotemporal synchronicity in bank vole population fluctuations in Norway
Selås, Vidar; Framstad, Erik; Rolstad, Jørund; Sonerud, Geir Andreas; Spidsø, Tor K.; Wegge, Per (Peer reviewed; Journal article, 2021)Population fluctuations of small rodents are often synchronized over larger areas (>100 km) than what could be explained by dispersal, suggesting that the synchronizing factor is weather-related and possibly mediated through ... -
Diet, diel activity pattern and prey handling of nesting hawk owls (Surnia ulula) as revealed by video monitoring
Gjøran, Stenberg (Master thesis, 2018)I used video monitoring to record prey deliveries at four nests of the northern hawk owl (Surnia ulula) in southern Norway. One nest was monitored in May 2014, while the three other nests were monitored in May-July 2017. ... -
Factors affecting hedgehog (Erinaceus europaeus) : presence in residential areas in Southern Norway assessed by a questionnaire survey
Tysnes, Tanya Marlene (Master thesis, 2016-09-02)The European hedgehog (Erinaceus europaeus) is a nocturnal small-sized mammal, 25-40cm, which is only active, from April to September. The purpose of this study was to investigate the various factors that may affect a ... -
Food provisioning in a generalist predator : selecting, preparing, allocating and feeding prey to nestlings in the Eurasian kestrel (Falco tinnunculus)
Steen, Ronny (PhD Thesis;2010:36, Doctoral thesis, 2010)Prey handling behaviour is important for prey selection, but are poorly known for raptors. Therefore, selection and handling of prey by European kestrels (Falco tinnunculus) was studied by observing prey transfer outside ... -
Frøsetting hos eik, gran og blåbær som grunnlag for museprognoser : vurderinger basert på en 100-års oversikt fra Aust-Agder
Selås, Vidar (MINA fagrapport;64, Report, 2020)Smågnagerår fører til store samfunnsmessige kostnader, både som følge av skader ved museinvasjon i bygninger, og som følge av skader i hage- jord- og skogbruk. På begynnelsen av 1970-tallet satte Det Norske Skogforsøksvesen ... -
Great cormorant Phalacrocorax carbo diet related to the supply of marine shallow-living fish species in southeastern Norway; opportunistic or selective foraging?
Gustavsen, Fredrik (Master thesis, 2017)The diet of wintering and nesting great cormorants in a marine, coastal ecosystem located in southeastern Norway was studied by analyzing stomachs of shot individuals and regurgitations collected at a nesting colony. ... -
Kraftgater som habitat : effekter av bredde, alder, skjøtsel og plassering på biologisk mangfold
Eldegard, Katrine; Moe, Stein R.; Selås, Vidar (MINA fagrapport;20, Report, 2012)Kraftgater har blitt etablert i mange naturlige økosystemer over hele verden. Til tross for at vi i Norge har et omfattende nettverk av kraftgater, er kunnskapen om kraftgater som habitat og om effekter av ulike skjøtselmetoder ... -
Lichen-gastropod interactions : Chemical defence and ecological consequences of lichenivory
Asplund, Johan (PhD Thesis;2010:2, Doctoral thesis, 2010)Herbivory are considered a significant factor regulating plant communities. Some mammals, e.g. reindeers, substantially influence lichen-dominated communities. The impact on lichens posed by invertebrate grazers is less ... -
Moth species richness and diversity decline in a 30‑year time series in Norway, irrespective of species’ latitudinal range extent and habitat
Burner, Ryan C.; Selås, Vidar; Kobro, Sverre; Jacobsen, Rannveig Margrete; Sverdrup-Thygeson, Anne (Peer reviewed; Journal article, 2021)Introduction Insects are reported to be in decline around the globe, but long-term datasets are rare. The causes of these trends are elusive, with changes in land use and climate among the top candidates. Yet if species ... -
Mulige indirekte effekter av klimavariasjoner for smågnagere og hønsefugler : bestandsfluktuasjoner 1920–2010 vurdert i forhold til frøsetting og sommertemperatur
Selås, Vidar (MINA fagrapport;16, Report, 2011)Smågnagernes viktige økologiske rolle og hønsefuglenes betydning som jaktobjekt gjør at det er knyttet stor interesse til mulige klimaeffekter på de velkjente 3–4 års bestandssvingningene for disse dyregruppene. Det er ... -
The expansion of red foxes (Vulpes vulpes) into alpine areas - Effects of human-induced subsidies along roads, and consequences for ground-nesting birds
Lyngen, Joakim (Master thesis, 2016-08-15)During the past century, the red fox (Vulpes vulpes) has gradually increased its presence in alpine habitats, threatening endangered species such as the arctic fox (Vulpes lagopus). Several factors have been suggested ... -
Timing of population peaks of Norway lemming in relation to atmospheric pressure: A hypothesis to explain the spatial synchrony
Selås, Vidar (Journal article; Peer reviewed, 2016) -
Utbredelse og habitatvalg hos piggsvin (Erinaceus europaeus) i Ås kommune : hva påvirker forekomsten av piggsvin ved bebyggelse?
Gulliksen, Ingrid E. (Master thesis, 2016-08-31)Piggsvin (Erinaceus europaeus) er et lite nattaktivt pattedyr som trives i kulturlandskap, og i urbane og landlige områder. Det kan leve nær mennesker og blir ofte sett i hager og parker i byer og tettsteder. I tettsteder ... -
Voles and climate in Norway: Is the abundance of herbivorous species inversely related to summer temperature?
Selås, Vidar; Framstad, Erik; Sonerud, Geir Andreas; Wegge, Per; Wiig, Øystein (Journal article; Peer reviewed, 2018)For several mammalian species, both population levels and distribution ranges are predicted to change due to changing habitat conditions caused by climate change. A general decrease in the amplitude of small rodent population ...