Blar i NORCE vitenarkiv på forfatter "Sægrov, Harald"

Viser treff 1-9 av 9

    • Development of a risk assessment for sea trout in coastal areas exploited for aquaculture 

      Finstad, Bengt; Sandvik, Anne Dagrun; Ugedal, Ola; Vollset, Knut; Karlsen, Ørjan; Davidsen, Jan Grimsrud; Sægrov, Harald; Lennox, Robert J. (Peer reviewed; Journal article, 2021)
      The regulation of aquaculture production in Norway considers the potential impact of salmon lice on wild fish. However, most attention has been focused on impacts on wild Atlantic salmon, despite the fact that anadromous ...

    • Ecological regime shift in the Northeast Atlantic Ocean revealed from the unprecedented reduction in marine growth of Atlantic salmon 

      Vollset, Knut; Urdal, Kurt; Utne, Kjell Rong; Thorstad, Eva Bonsak; Sægrov, Harald; Raunsgard, Astrid; Skagseth, Øystein; Lennox, Robert; Østborg, Gunnel Marie; Ugedal, Ola; Jensen, Arne Johan; Bolstad, Geir Hysing; Fiske, Peder (Peer reviewed; Journal article, 2022)
      Ecological regime shifts are abrupt changes in the structure and function of ecosystems that persist over time, but evidence of contemporary regime shifts are rare. Historical scale data from 52,384 individual wild Atlantic ...

    • Evaluation of genetic effects on wild salmon populations from stock enhancement 

      Hagen, Ingerid Julie; Ugedal, Ola; Jensen, Arne Johan; Lo, Håvard; Holthe, Espen; Bjøru, Bjørn; Florø-Larsen, Bjørn; Sægrov, Harald; Skoglund, Helge; Karlsson, Sten (Peer reviewed; Journal article, 2020)
      Many salmonid populations are of conservation concern, and the release of hatchery-produced juveniles is a frequently used measure to alleviate declines and increase harvest opportunities. While such releases may be of ...

    • Improving Salmonid Monitoring by Nocturnal Counting in Rivers 

      Kambestad, Marius; Hellen, Bjart Are; Jensen, Knut Helge; Sægrov, Harald (Peer reviewed; Journal article, 2022)
      Accurate abundance estimates are crucial for evidence-based fisheries management. In rivers, drift dive counting and electrofishing are commonly used for quantifying fish abundance. However, the likelihood that fish are ...

    • Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations 

      Diserud, Ola Håvard; Fiske, Peder; Karlsson, Sten; Glover, Kevin Alan; Næsje, Tor; Aronsen, Tonje; Bakke, Gunnar O; Barlaup, Bjørn Torgeir; Erkinaro, J.; Florø-Larsen, Bjørn; Foldvik, Anders; Heino, Mikko Petteri; Kanstad-Hanssen, Øyvind; Lo, Håvard; Lund, Roar Asbjørn; Muladal, R.; Niemela, E.; Økland, Finn; Østborg, Gunnel Marie; Otterå, Håkon Magne; Skaala, Øystein; Skoglund, Helge; Solberg, Ingrid; Solberg, Monica Favnebøe; Sollien, Vegard Pedersen; Sægrov, Harald; Urdal, Kurt; Wennevik, Vidar; Hindar, Kjetil (Peer reviewed; Journal article, 2022)
      Marine aquaculture of Atlantic salmon (Salmo salar) is a relatively new industry where breeding programs have led to rapid genetic change in the captive populations that were built up alongside conspecific wild individuals. ...

    • Predicting the nationwide outmigration timing of Atlantic salmon (Salmo salar) smolts along 12 degrees of latitude in Norway 

      Vollset, Knut; Lennox, Robert J.; Lamberg, Anders; Skaala, Øystein; Sandvik, Anne Dagrun; Sægrov, Harald; Kvingedal, Eli; Kristensen, Torstein; Jensen, Arne Johan; Haraldstad, Tormod; Barlaup, Bjørn Torgeir; Ugedal, Ola (Journal article; Peer reviewed, 2021)
      Aim Accurate predictions about transition timing of salmon smolts between freshwater and marine environments are key to effective management. We aimed to use available data on Atlantic salmon smolt migration to predict ...

    • Regnbueørret (Onchorhynchus mykiss); produksjon og interaksjoner med stedegne arter 

      Skaala, Øystein; Borgstrøm, Reidar; Solberg, Monica Favnebøe; Fiske, Peder; Hindar, Kjetil; Jensen, Arne Johan; Mo, Tor Atle; Sægrov, Harald; Barlaup, Bjørn Torgeir (Rapport fra havforskningen, Research report, 2020)
      Den globale spredningen av regnbueørret (Onchorhynchus mykiss) har ført den inn på listen over de 100 verste invaderende arter i verden, utarbeidet av den internasjonale naturvernorganisasjonen IUCN. Den er også oppført ...

    • Rømt oppdrettslaks i vassdrag i 2018 : Rapport fra det nasjonale overvåkningsprogrammet 

      Aronsen, Tonje; Bakke, Gunnar O; Barlaup, Bjørn Torgeir; Berntsen, Johan Henrik Hårdensson; Diserud, Ola Håvard; Fiske, Peder; Fjeldheim, Per Tommy; Larsen, Bjørn Florø; Glover, Kevin; Heino, Mikko Petteri; Husebø, Åse; Næsje, Tor; Skoglund, Helge; Sollien, Vegard Pedersen; Sægrov, Harald; Urdal, Kurt; Wennevik, Vidar (Fisken og Havet, Research report, 2019)

    • Rømt oppdrettslaks i vassdrag i 2020 - Rapport fra det nasjonale overvåkningsprogrammet 

      Wennevik, Vidar; Ambjørndalen, Vegard M.; Aronsen, Tonje; Bakke, Gunnar O; Barlaup, Bjørn Torgeir; Diserud, Ola Håvard; Fiske, Peder; Fjeldheim, Per Tommy; Florø-Larsen, Bjørn; Glover, Kevin Alan; Heino, Mikko Petteri; Næsje, Tor; Skaala, Øystein; Skoglund, Helge; Solberg, Ingrid; Solberg, Monica Favnebøe; Sægrov, Harald; Urdal, Kurt; Utne, Kjell Rong (Rapport fra havforskningen, Research report, 2021)
      I 2014 ble et nytt nasjonalt overvåkningsprogram for rømt oppdrettslaks i vassdrag utformet og etablert på oppdrag fra Fiskeridirektoratet etter føringer fra Nærings- og Fiskeridepartementet. Dette overvåkingsprogrammet ...