Blar i NORCE vitenarkiv på forfatter "Vollset, Knut Wiik"

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    • Acoustic telemetry predation sensors reveal the tribulations of Atlantic salmon (Salmo salar) smolts migrating through lakes 

      Hanssen, Erlend Mjelde; Vollset, Knut Wiik; Salvanes, Anne Gro Vea; Barlaup, Bjørn; Whoriskey, Kim; Isaksen, Trond Einar; Normann, Eirik Straume; Hulbak, Magnus Andre; Lennox, Robert (Peer reviewed; Journal article, 2021)
      Smolt migration through lakes is hazardous, as the predation pressure can be extreme and the hydrology a great contrast to that of a riverine area. However, the mechanisms yielding these challenges have been scarcely ...

    • Assessing the occurrence of egg stranding for trout and salmon in a regulated river 

      Skoglund, Helge; Vollset, Knut Wiik; Wiers, Tore; Barlaup, Bjørn Torgeir (Peer reviewed; Journal article, 2023)
      A key challenge in many regulated rivers is to define adequate flow levels to protect aquatic organisms. Provisioning of suitable flow can be pivotal bottlenecks for fishes such as salmon and trout that use the riverbed ...

    • Behavioural response of brown trout (Salmo trutta) to total dissolved gas supersaturation in a regulated river 

      Lennox, Robert J.; Thiemer, Kirstine; Vollset, Knut Wiik; Pulg, Ulrich; Stranzl, Sebastian; Nilsen, Cecilie Iden; Haugen, Thrond Oddvar; Velle, Gaute (Peer reviewed; Journal article, 2021)
      Total dissolved gas supersaturation from dams and power stations is a chronic freshwater pollutant that is toxic to animals with aquatic respiration. Laboratory ecotoxicology experiments have revealed capacity for captive ...

    • Delayed maturity does not offset negative impact afflicted by ectoparasitism in salmon 

      Vollset, Knut Wiik; Krkošek, Martin (Peer reviewed; Journal article, 2021)
      The negative effects of parasitism on host population dynamics may be mediated by plastic compensatory life-history changes in hosts. Theory predicts that hosts should shift their life-history towards early reproduction ...

    • Effekter av endret vanntemperatur på vekst og rekruttering hos laks i Bolstadelva 

      Skoglund, Helge; Vollset, Knut Wiik; Isaksen, Trond Einar; Avlesen, Helge; Barlaup, Bjørn Torgeir (LFI - Laboratorium for ferskvannsøkologi og innlandsfiske;, Research report, 2023)
      Evanger kraftverk fører til at vanntemperaturen i Bolstadelva blir kaldere om sommeren og varmere om vinteren. Lavere sommertemperatur resulterer i redusert vekst hos ungfisk av laks og aure, og dermed økt smoltalder. Det ...

    • Predation research with electronic tagging 

      Lennox, Robert J.; Dahlmo, Lotte Svengård; Ford, Adam T.; Sortland, Lene K.; Vogel, Emma; Vollset, Knut Wiik (Peer reviewed; Journal article, 2022)
      Predation is a fundamental aspect of ecology that drives ecosystem structure and function. A better understanding of predation can be facilitated by using electronic tags that log or transmit positions of predator or prey ...