Browsing Brage INN by Author "Jahren, Torfinn"
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Declining reproductive output in capercaillie and black grouse – 16 countries and 80 years
Jahren, Torfinn; Storaas, Torstein; Willebrand, Tomas; Moa, Pål Fossland; Hagen, Bjørn Roar (Journal article; Peer reviewed, 2016)Declines in populations of capercaillie (Tetrao urogallus) and black grouse (Lyrurus tetrix) have been reported from both Central Europe and the continuous boreal forests of Fennoscandia. While intensified land-use is ... -
Evaluating effects from releasing hand-reared common pheasant (Phasianus colchicus) and grey partridge (Perdix perdix) on biological diversity and animal welfare in Norway
Jahren, Torfinn; Lian, Marianne; Willebrand, Tomas (Oppdragsrapport;13/2023, Research report, 2023)English: The Department of Forestry and Wildlife Management at Inland University of Applied Sciences was commissioned by Fuglehundklubbenes Forbund (FKF) and their Lavlandskomite (LK) to scientifically review and assess ... -
How do microtine rodent abundance, snow and landscape parameters influence pine marten Martes martes population dynamics?
Angoh, Jennifer; Nergaard, Petter Johannes; Jahren, Torfinn; Odden, Morten; Brainerd, Scott Michael (Peer reviewed; Journal article, 2024)The pine marten (Martes martes) occupies the northernmost extent of its distribution in Norway, where microtine rodents are an important food item. The relationship between microtine rodent abundance and pine marten ... -
The impact of human land use and landscape productivity on population dynamics of red fox in southeastern Norway
Jahren, Torfinn; Odden, Morten; Linnell, John Durrus; Panzacchi, Manuela (Peer reviewed; Journal article, 2020)In the boreal forest, the red fox (Vulpes vulpes) is a key species due to its many strong food web linkages and its exploitation of niches that form in the wake of human activities. Recent altitudinal range expansion and ... -
På predasjon av storfuglreir (Tetrao urogallus) i Hedmark : et eksperimentelt studium
Jahren, Torfinn (Bachelor thesis, 2010)Norsk:Denne oppgaven tar for seg forhold knyttet til reirpredasjon hos storfugl (Tetrao urogallus) i Hedmark fylke. Oppgaven bygger på datamateriale fra reir som er funnet våren 2009. Studiet viser at det er mulig å finne ... -
The role of nest predation and nest predators in population declines of capercaillie and black grouse
Jahren, Torfinn (Doctoral thesis, 2017)I det sammenhengende Fennoskandiske barskogbeltet har storfugl- (Tetrao urogallus) og orrfuglbestandene (Lyrurus tetrix) gått ned over tid, og toppene i de sykliske svingningene har blitt mer uregelmessige og lavere. At ...