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

      Lennox, Robert J.; Espedal, Espen Olsen; Barlaup, Bjørn T.; 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 ...
    • Laks i sjøørretbekker – villaks eller oppdrettslaks? 

      Pulg, Ulrich; Karlsson, Sten; Diserud, Ola H.; Postler, Christoph; Stranzl, Sebastian Franz; Espedal, Espen Olsen; Lennox, Robert J. (LFI - Laboratorium for ferskvannsøkologi og innlandsfiske;, Research report, 2020)
      Innkrysning av rømt oppdrettslaks vurderes som en av de største truslene mot villaks. Overvåking av innkrysning og innsig av oppdrettslaks samt uttak av oppdrettsfisk gjennomføres i en rekke lakseelver. I mindre kystvassdrag ...
    • Lakselusinfestasjon på vill laksefisk langs Norskekysten i 2020 - Sluttrapport til Mattilsynet 

      Nilsen, Rune; Serra Llinares, Rosa Maria; Sandvik, Anne Dagrun; Johnsen, Ingrid Askeland; Mohn, Agnes Marie; Karlsen, Ørjan; Lehmann, Gunnar Bekke; Birkeland, Ina Bakke; Stöger, Elisabeth; Lennox, Robert J.; Uglem, Ingebrigt; Berg, Marius (Rapport fra havforskningen, Research report, 2020)
      Overvåkingsprogrammet for lakselus på vill laksefisk (NALO) er i 2020 gjennomført på oppdrag fra Mattilsynet (MT) og Nærings- og Fiskeridepartementet (NFD). En hydrodynamisk spredningsmodell som beregner tetthet av infektive ...
    • 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 (Peer reviewed; Journal article, 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 ...
    • Size dependent effects of passive integrated transponders (PIT-tags) on early life stages of salmon: a preliminary literature review 

      Vollset, Knut W.; Lennox, Robert J.; Mahlum, Shad; Näslund, Joacim; Larsen, Martin H.; Thorstad, Eva B.; Frechette, Danielle; Finstad, Bengt; Davidsen, Jan Grimsrud (Research report, 2019)
      Passive Integrated Transponder (PIT) tags are commonly used to individually mark salmonids for assessing marine and freshwater survival, habitat use, and other aspects of life history essential for persistence of the ...
    • Systematic review and meta-analysis of PIT tagging effects on mortality and growth of juvenile salmonids 

      Vollset, Knut; Lennox, Robert J.; Thorstad, Eva Bonsak; Auer, Samuel; Bär, Kerstin; Larsen, Martin H.; Mahlum, Shad Kenneth; Näslund, Joacim; Stryhn, Henrik; Dohoo, Ian (Peer reviewed; Journal article, 2020)
      A systematic review and meta-analysis was conducted to evaluate the appropriate tag:fish size ratio when tagging juvenile salmonids (genera Oncorhynchus, Salmo, and Salvelinus). The review yielded 18 publications with 211 ...
    • The risk of individual fish being captured multiple times in a catch and release fishery 

      Thorstad, Eva Bonsak; Diserud, Ola Håvard; Solem, Øyvind; Havn, Torgeir Børresen; Bjørum, Lars Rasmus Oftedal; Kristensen, Torstein; Urke, Henning Andre; Johansen, Martin Rognli; Lennox, Robert J.; Fiske, Peder; Uglem, Ingebrigt (Peer reviewed; Journal article, 2019)
      The proportion of angled Atlantic salmon Salmo salar L. being caught and released has increased. If individuals are repeatedly captured, this may have fish welfare consequences. Of 995 Atlantic salmon tagged during catch ...
    • Wild salmonids are running the gauntlet of pathogens and climate as fish farms expand northwards 

      Vollset, Knut; Lennox, Robert J.; Davidsen, Jan Grimsrud; Eldøy, Sindre Håvarstein; Isaksen, Trond Einar; Madhun, Abdullah Sami; Karlsson, Sten; Miller, Kristina M (Peer reviewed; Journal article, 2020)
      Salmon farming has multiplied from a side business of coastal farmers to one of the world's major aquaculture species. This has dramatically altered the disease dynamics between farmed and wild salmonids. As salmon fish ...