Browsing Bergen Open Research Archive by Author "Vollset, Knut"

Now showing items 1-7 of 7

    • Impacts of predation by Eurasian otters on Atlantic salmon in two Norwegian rivers 

      Sortland, Lene; Lennox, Robert; Velle, Gaute; Vollset, Knut; Kambestad, Marius (Journal article; Peer reviewed, 2023)
      1. The return of the Eurasian otter (Lutra lutra) to western Norway has sparked human–predator conflicts because otters prey on vulnerable Atlantic salmon (Salmo salar) populations. Although predation may not be the ultimate ...

    • Making the best of lousy circumstances: The impact of salmon louse Lepeophtheirus salmonis on depth preference of sea trout Salmo trutta 

      Mohn, Agnes Marie; Vollset, Knut; Karlsbakk, Egil (Journal article; Peer reviewed, 2020)
      ABSTRACT: Sea trout are known for seeking out sources of freshwater to rid themselves of salmon lice. However, the effect of natural haloclines in fjords on parasite dynamics is not well understood. We tagged 48 naturally ...

    • Negative impacts of the sea lice prophylactic emamectin benzoate on the survival of hatchery released salmon smolts in rivers 

      Lennox, Robert J.; Salvanes, Anne Gro Vea; Barlaup, Bjørn Torgeir; Stöger, Elisabeth; Madhun, Abdullah; Helle, Turid Myklebust; Vollset, Knut (Journal article; Peer reviewed, 2020)
      Emamectin benzoate (EB) is a prophylactic pharmaceutical used to protect Atlantic salmon (Salmo salar) smolts migrating out of rivers and into the ocean against sea lice parasites. Randomized control trials comparing the ...

    • Positioning aquatic animals with acoustic transmitters 

      Lennox, Robert; Aarestrup, Kim; Alós, Josep; Arlinghaus, Robert; Aspillaga, Eneko; Bertram, Michael G.; Birnie-Gauvin, Kim; Brodin, Tomas; Cooke, Steven J.; Dahlmo, Lotte Svengård; Dhellemmes, Félicie; Gjelland, Karl Øystein; Hellström, Gustav; Hershey, Henry; Holbrook, Christopher; Klefoth, Thomas; Lowerre-Barbieri, Susan; Monk, Christopher T.; Nilsen, Cecilie Iden; Pauwels, Ine; Pickholtz, Renanel; Prchalová, Marie; Reubens, Jan; Říha, Milan; Villegas-Ríos, David; Vollset, Knut; Westrelin, Samuel; Baktoft, Henrik (Journal article; Peer reviewed, 2023)
      Geolocating aquatic animals with acoustic tags has been ongoing for decades, relying on the detection of acoustic signals at multiple receivers with known positions to calculate a 2D or 3D position, and ultimately recreate ...

    • Swimming with the fishes: validating drift diving to identify farmed Atlantic salmon escapees in the wild 

      Mahlum, Shad Kenneth; Skoglund, Helge; Wiers, Tore; Norman, Eirik; Barlaup, Bjørn Torgeir; Wennevik, Vidar; Glover, Kevin; Urdal, Kurt; Bakke, Gunnar O; Vollset, Knut (Peer reviewed; Journal article, 2019)
      Escaped farmed Atlantic salmon Salmo salar interbreeding with wild conspecifics represents a threat to the genetic integrity and viability of wild populations. Therefore, it is necessary to accurately quantify escapees in ...

    • A test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord 

      Lennox, Robert J.; Espedal, Espen Olsen; Barlaup, Bjørn Torgeir; Mahlum, Shad Kenneth; Vollset, Knut (Peer reviewed; Journal article, 2019)
      Atlantic salmon (Salmo salar) smolts are vulnerable to predators during their seaward migration. To determine whether sea trout (Salmo trutta) exhibit a coupled migration to exploit the smolt run, we tracked Atlantic salmon ...

    • Validating timing of salmon smolt runs obtained by telemetry studies 

      Hulbak, Magnus Andre; Hanssen, Erlend Mjelde; Lennox, Robert; Salvanes, Anne Gro Vea; Barlaup, Bjørn Torgeir; Gharbi, Naouel; Nilsen, Tom Ole; Vollset, Knut (Journal article; Peer reviewed, 2021)
      Telemetry tags are increasingly used in management to monitor the migration timing of Atlantic salmon smolts (Salmo salar L.). It has been postulated that (1) effects from tagging and handling may alter migration behaviour, ...