Blar i forfatter Norges arktiske universitetsmuseum "Frafjord, Karl"

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    • Grazing by sheep Ovis aries reduces island populations of water voles Arvicola amphibius 

      Frafjord, Karl (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)

    • Influence of night length on home range size in the northern bat Eptesicus nilssonii 

      Frafjord, Karl (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-04)
      The northern bat Eptesicus nilssonii is widespread in Fennoscandia, with breeding populations well above the Arctic Circle. I studied this species at its extreme northern limit, at 69°N in Norway. I radio-tracked 17 bats from 2 maternity roosts during 2003–2006 to study the influence of the midnight sun and increasing lengths of darkness on activity (time spent out of roost) and home range size. ...

    • Influence of Reproductive Status: Home Range Size in Water Voles (Arvicola amphibius) 

      Frafjord, Karl (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-04-26)
      The relationship between home range and reproductive status of water voles (Arvicola amphibius) was studied by radio-tracking on an island off the coast of northern Norway in 2006–2009. The aim was to test assumptions about the species’ social structure relative to other microtines. Juveniles used fairly small ranges (about 400 m²), with no difference between males and females. Subadults, overwintered ...