Blar i Brage NMBU på forfatter "Steen, Ronny"
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Monitoring Daily Activity and Parental Food Provisioning in the Atlantic Puffin (Fratercula arctica) by the Use of Camera Traps
Hornset, Kristin (Master thesis, 2017)Seabirds are top predators in the marine environment, and because seabird diet may reflect fish availability, diet may function as an indicator of fish stocks and ecosystem status. Seabird diet is traditionally studied in ... -
Monitoring diel and seasonal activity of voles and shrews at Hardangervidda using camera trapping
Kildahl, Anniken; Hovstad, Marita Klingan (Master thesis, 2020)Voles (Microtinae) and shrews (Soricidae) are keystone species in the northern terrestrial ecosystems, with voles functioning as seed dispersers and vegetation facilitators and all species being important prey for a range ... -
Monitoring food provisioning and diel activity of breeding glaucous gulls (Larus hyperboreus) with nest cameras on Bjørnøya
Sørensen, Emma Andrea (Master thesis, 2021)Arctic seabirds are drawn to nutrient rich areas in the breeding season, their diet reflects the availability of prey and can function as an indicator of ecosystem status. In this study, I observed food provisioning, diel ... -
Owls in boxes : what prey do Ural owls (Strix uralensis) bring to their nestlings, when do they bring prey, and how are they handled
Heimset, Ruben (Master thesis, 2020)Earlier studies have investigated the feeding of owl nestlings through examining remains of animals in nests. In some species, like the Ural owls (Strix uralensis), this may give lacking information since they are known ... -
Prey choice, prey deliveries and prey handling in a generalist predator : video monitoring at a nest of the eagle owl (Bubo bubo)
Nyhammer, Vegard (Master thesis, 2016-07-26)To record prey delivery and handling, and nest of the eagle owl (Bubo bubo), a breeding pair was video monitored during 6 June – 25 July in Meland municipality in Hordaland County, Norway. A total of 49 prey items were ... -
Prey delivery and handling at the nest in ospreys (Pandion haliaetus) : diel patterns and potential family conflicts
Bjørgeengen, Silje (Master thesis, 2016-09-02)The prey items delivered at four osprey (Pandion haliaetus) nests in Østfold county, Norway, and the handling of these, were recorded on video during the nestling season in June-August of 2015. A total of 510 prey items ... -
Prey delivery, prey handling and circadian rhythm at two Rough-legged buzzard (Buteo Lagopus) nests as revealed by use of video monitoring
Andersson, Michael (Master thesis, 2021)Two Rough-legged buzzard (Buteo lagopus) nests, were video monitored during the nestling period in 2017 in Norway. One nest was in Surnadal in Møre and Romsdal county and the other, Goppollvatnet in Innlandet county. This ... -
Prey handling by a generalist predator, the golden eagle (Aquila chrysaetos)
Grønsdal, Espen (Master thesis, 2012-11-08)Although the golden eagle (Aquila chrysaetos) is a well-studied raptor, there is a lack of studies on its prey handling-behaviour, which is important for understanding its prey selection. I extracted data on four individuals ... -
Temporal patterns of main and alternative prey deliveries at a Eurasian kestrel (Falco tinnunculus) nest
Laursen, Torbjørn (Master thesis, 2022)Prey switching is an important part of predator feeding and breeding ecology since prey populations and therefore prey availability is dynamic. Deliveries of prey made by the Eurasian kestrel (Falco tinnunculus) breeding ... -
Use of sound stimuli to elicit a change in moose (Alces alces) and red deer (Cervus elaphus) behaviour
Almås, Petter (Master thesis, 2021)Over the years, a lot of different actions have been tested in order to prevent road and railway collisions with cervids. Amongst them, actions aiming to change animal behaviour. The aim of such actions has been to elicit ... -
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 ... -
Video monitoring of ospreys (Pandion haliaetus) at the nest : prey deliveries, feeding time and potential family conflicts
Lien, Tuva Flor (Master thesis, 2017)Prey deliveries and feeding time was recorded and analyzed at two osprey (Pandion haliaetus) nests located in Østfold county, Norway during the breeding season of 2016. Feeding time analysis was only done when the nestlings ...