Blar i forfatter "Kjær, Runar"

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    • Contrasting patterns in trophic niche evolution of polymorphic Arctic charr populations in two subarctic Norwegian lakes 

      Moccetti, Paolo Maria; Siwertsson, Anna; Kjær, Runar; Amundsen, Per-Arne; Præbel, Kim; Tamayo, Ana-Maria Peris; Power, Michael; Knudsen, Rune (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-05-15)
      Parallelism in trophic niches of polymorphic populations of Arctic charr was investigated in two similar subarctic lakes, Tårnvatn and Skøvatn, in northern Norway. Analysis of eleven microsatellite loci confirmed, respectively, the existence of three and two genetically differentiated morphs. Three methods were used to describe their trophic niches: habitat choice and stomach contents for the recent ...

    • Environmentally modulated repeat evolution of polymorphic Arctic charr life history traits 

      Grenier, Gabrielle; Smalås, Aslak; Kjær, Runar; Knudsen, Rune (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-13)
      Sympatric Arctic charr, <i>Salvelinus alpinus</i> (L. 1758), morphs have flexible but repeated life history strategies tested across five Norwegian lakes. In several Scandinavian polymorphic Arctic charr populations differentiated by their diet and habitat use, a large littoral omnivorous (LO) morph commonly cooccurs with a smaller profundal spawning (PB/PZ) morph. A third, large piscivorous (PP) ...

    • Life-history strategies in two subarctic lakes with polymorphic Arctic charr Salvelinus alpinus L. populations. High across lakes stability in evolution of life-history strategies 

      Kjær, Runar (Master thesis; Mastergradsoppgave, 2018-05-13)
      Life history strategies of polymorphic Arctic charr in two sub-arctic lakes (Tårnvatn and Skøvatn) with similar environmental- and physiochemical conditions were studied. Disparities in life history traits may reflect ecological adaptations and is suggested an important factor in the incipient speciation process. In this region several lakes have polymorphic charr, and the designation of a fish to ...