Blar i Articles på forfatter "Urdal, Kurt"
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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 ... -
Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater
Glover, Kevin; Bos, J. B.; Urdal, Kurt; Madhun, Abdullah Sami; Sørvik, Anne Grete Eide; Unneland, Laila; Seliussen, Bjørghild Breistein; Skaala, Øystein; Skilbrei, Ove; Tang, Y.; Wennevik, Vidar (Journal article; Peer reviewed, 2016-02-09)Each year, hundreds of thousands of farmed Atlantic salmon escape from fish farms into the wild. Some of these escapees enter freshwater, and manage to interbreed with native populations. To hinder further genetic introgression ... -
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. ... -
Swimming with the fishes: validating drift diving to identify farmed Atlantic salmon escapees in the wild
Mahlum, Shad Kenneth; Skoglund, Helge; Wiers, Tore; Norman, E. S.; Barlaup, Bjørn Torgeir; Wennevik, Vidar; Glover, Kevin; Urdal, Kurt; Bakke, Gunnar O; Vollset, Knut (Journal article; Peer reviewed, 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 ... -
Time series covering up to four decades reveals major changes and drivers of marine growth and proportion of repeat spawners in an Atlantic salmon population
Harvey, Alison C.; Skaala, Øystein; Borgstrøm, Reidar; Andersen-Fjeldheim, Per Tommy; Andersen-Fjeldheim, Kaja Christine; Utne, Kjell Rong; Johnsen, Ingrid Askeland; Fiske, Peder; Winterthun, Synnøve; Knutar, Sofie; Sægrov, Harald; Urdal, Kurt; Glover, Kevin Alan (Peer reviewed; Journal article, 2022)Wild Atlantic salmon populations have declined in many regions and are affected by diverse natural and anthropogenic factors. To facilitate management guidelines, precise knowledge of mechanisms driving population changes ...