Blar i forfatter "Stien, Jennifer"

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    • Berettiget kritikk av NMBU sin reindriftsforskning 

      Stien, Audun; Ims, Rolf Anker; Yoccoz, Nigel; Tveraa, Torkild; Stien, Jennifer (Chronicle; Kronikk, 2021-12-21)
      Det er flere elementer i artikkelen til NMBU-forskerne som fremstår som uforenlig med god vitenskapelig praksis.

    • High goose abundance reduces nest predation risk in a simple rodent-free high-Arctic ecosystem 

      Pedersen, Åshild Ønvik; Stien, Jennifer; Eidesen, Pernille Bronken; Ims, Rolf Anker; Jepsen, Jane Uhd; Stien, Audun; Tombre, Ingunn; Fuglei, Eva (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12-13)
      Breeding geese are the preferred prey of the Arctic fox Vulpes lagopus in the high-Arctic Svalbard archipelago. According to the <i>apparent competition hypothesis (ACH)</i>, less-abundant prey species (e.g. ptarmigan, waders and small passerines) will experience higher predation rates when breeding in association with the more common prey (geese), due to spill-over predation by the shared predator. ...

    • Nest predation in birds of conservation concern. Case studies of monitoring and management. 

      Stien, Jennifer (Doctoral thesis; Doktorgradsavhandling, 2015-06-12)
      In this thesis I have used a variety of study methods at different spatial and temporal scales to explore population processes and management of 2 bird species of conservation concern, common eider and Slavonian grebe, focusing particularly on the role of nest predation in declining populations. I have demonstrated the role of proximate and ultimate causes of nest loss in eider at 2 declining colonies ...

    • The role of the Hooded Crow (Corvus corone) in the nesting success of the Common Eider (Somateria mollissima) at two colonies in Troms county, Northern Norway 

      Stien, Jennifer (Master thesis; Mastergradsoppgave, 2008-05)
      There is evidence of a negative population trend for the two neighbouring eider colonies of Håkøya and Grindøya in Troms county, northern Norway. Casual observations suggest that nest predation may be an important factor, and that the hooded crow in particular could be the main egg predator. On this basis, a two year pilot study was conducted to investigate the role of the hooded crow in the nest ...

    • Unfounded claims about productivity beyond density for reindeer pastoralism systems 

      Stien, Audun; Tveraa, Torkild; Ims, Rolf Anker; Stien, Jennifer; Yoccoz, Nigel (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-22)
      We point out problems with the article Productivity beyond density: A critique of management models for reindeer pastoralism in Norway by Marin and co-workers published in Pastoralism in 2020. In our opinion, there are several misleading claims about the governance of the reindeer pastoralist system in Norway, the Røros model for herd management and density dependence in reindeer herds in their ...