Blar i forfatter "Grenier, Gabrielle"

Viser treff 1-4 av 4

    • 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) ...

    • The intraspecific diversity of Norwegian Arctic charr (Salvelinus alpinus (L.)): An examination of repeatability and life history 

      Grenier, Gabrielle (Doctoral thesis; Doktorgradsavhandling, 2023-11-24)
      Across Arctic charr’s Holearctic distribution we see repeated patterns where multiple ecotypes diverge along ecological resource gradients. Arctic charr occur in both anadromous and lacustrine forms. Furthermore, lacustrine ecotypes are seen repeatedly specializing their morphology, trophic ecology, and life history along a benthic pelagic axis and along the depth gradient. Typically, a pelagic ...

    • Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate 

      Grenier, Gabrielle; Tallman, Ross (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-18)
      Arctic charr (<i>Salvelinus alpinus</i> Linnaeus, 1758) are phenotypically variable with multiple life history strategies including anadromous and freshwater resident individuals. The mechanism determining life history is believed to be set early in life. Anadromous individuals show greater seasonality in growth and feeding after the first seaward migration relative to resident conspecifics. We used ...

    • Salmon-lice as a potential threat to anadromous Arctic charr populations 

      Rochat, Eloïse Coralie; Grenier, Gabrielle; Muladal, Rune; Jensen, Hallvard; Knudsen, Rune (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-25)
      Salmon-lice have the potential to change the behaviour and growth of their salmonid host species. Here, the baseline infection levels of salmon-lice of post-smolts (n = 815) and veteran migrants (n = 875) of sea-run Arctic charr (Salvelinus alpinus Linnaeus, 1758) were monitored over two successive years in a sub-Arctic Norwegian fjord without farming of salmonids. All Arctic charr were collected ...