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Brage NMBU
Master thesis . 2017
Data sources: Brage NMBU
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Interactions between arctic fox (Vulpes lagopus) and red fox (Vulpes vulpes) in alpine habitats in Norway : activity patterns and avoidance mechanisms

Authors: Ørmen, Hanne Jaasund;

Interactions between arctic fox (Vulpes lagopus) and red fox (Vulpes vulpes) in alpine habitats in Norway : activity patterns and avoidance mechanisms

Abstract

The arctic fox (Vulpes lagopus) population in Fennoscandia declined drastically in the beginning of the 20th century. In contrast, the red fox (Vulpes vulpes) population expanded rapidly during the 20th century. Fragmentation, dampened rodent cycles and increased interspecific competition with the red fox have been suggested to explain the non-recovery of the arctic fox. It is well documented that the arctic fox in most cases avoid contact with the red fox. In this study, baited camera traps were used to investigate if the arctic fox avoid the red fox in its search for food, spatially or temporally. Two hypotheses were addressed, and I investigated if: 1) there is a negative relationship between arctic fox activity and red fox activity at the baits, and 2) the time between red fox and arctic fox observations will increase with increasing activity of red fox at the bait, and activity of arctic fox and red fox will be temporally segregated.

Bestanden av fjellrev (Vulpes lagopus) i Fennoskandia gikk kraftig tilbake i begynnelsen av 1900-tallet, og bestanden har til tross for fredning ikke tatt seg opp igjen. I motsetning, økte bestanden av rødrev (Vulpes vulpes) kraftig i løpet av 1900-tallet. Fragmentering, svekkede smågnagersykluser og økt interspesifikk konkurranse med rødreven har blitt framsatt som forklaringer på hvorfor bestanden av fjellrev ikke har tatt seg opp igjen. Det er godt dokumentert at fjellreven i de fleste tilfeller unngår nærkontakt med rødreven. I denne studien ble viltkamera og åter brukt til å undersøke om fjellreven unngår rødreven, i tid eller rom. To hypoteser har blitt testet: 1) det er et negativt forhold mellom aktivitet av fjellrev og aktivitet av rødrev, og 2) tiden mellom et rødrevbesøk og det neste besøket av fjellrev vil øke med økende rødrevaktivitet på åtet, og aktivitet av fjellrev og rødrev vil være adskilt i tid.

Forfatterens navn på omslaget: Hanne Jaasund

M-LUN

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Norway
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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