Browsing Brage IMR by Author "Thorstad, Eva Bonsak"

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    • Age of European silver eels during a period of declining abundance in Norway 

      Durif, Caroline; Diserud, Ola Håvard; Sandlund, Odd Terje; Thorstad, Eva Bonsak; Poole, Russell; Bergesen, Knut Aanestad; Escobar, Rosa; Shema, Steven; Vøllestad, Leif Asbjørn (Peer reviewed; Journal article, 2020)
      The European eel (Anguilla anguilla) is critically endangered throughout its range. Knowledge about age distribution of future spawners (silver eels) is essential to monitor the status and contribute to the recovery of ...

    • Age of European silver eels during a period of declining abundance in Norway 

      Durif, Caroline; Diserud, Ola Håvard; Sandlund, Odd Terje; Thorstad, Eva Bonsak; Poole, Russell; Bergesen, Knut; Bergesen, Knut Aanestad; Escobar-Lux, Rosa H; Shema, Steven; Vøllestad, Leif Asbjørn (Peer reviewed; Journal article, 2020)
      The European eel (Anguilla anguilla) is critically endangered throughout its range. Knowledge about age distribution of future spawners (silver eels) is essential to monitor the status and contribute to the recovery of ...

    • Animal-borne telemetry: An integral component of the ocean observing toolkit 

      Harcourt, Rob; Sequeira, Ana M.M.; Zhang, Xuelei; Roquet, Fabien; Komatsu, Kosei; Heupel, Michelle; McMahon, Clive; Whoriskey, Fred; Meekan, Mark; Carroll, Gemma; Brodie, Stephanie; Simpfendorfer, Colin; Hindell, Mark; Jonsen, Ian; Costa, Daniel P.; Block, Barbara; Muelbert, Mônica; Woodward, Bill; Weise, Mike; Aarestrup, Kim; Biuw, Martin; Boehme, Lars; Bograd, Steven J.; Cazau, Dorian; Charrassin, Jean-Benoit; Cooke, Steven J.; Cowley, Paul; de Bruyn, P.J. Nico; Jeanniard du Dot, Tiphaine; Duarte, Carlos; Eguíluz, Victor M.; Ferreira, Luciana C.; Fernández-Gracia, Juan; Goetz, Kimberly; Goto, Yusuke; Guinet, Christophe; Hammill, Mike; Hays, Graeme C.; Hazen, Elliott L.; Hückstädt, Luis A.; Huveneers, Charlie; Iverson, Sara; Jaaman, Saifullah Arifin; Kittiwattanawong, Kongkiat; Kovacs, Kit M.; Lydersen, Christian; Moltmann, Tim; Naruoka, Masaru; Phillips, Lachlan; Picard, Baptiste; Queiroz, Nuno; Reverdin, Gilles; Sato, Katsufumi; Sims, David W.; Thorstad, Eva Bonsak; Thums, Michele; Treasure, Anne M.; Trites, Andrew W.; Williams, Guy D.; Yonehara, Yoshinari; Fedak, Mike A. (Journal article; Peer reviewed, 2019)
      Animal telemetry is a powerful tool for observing marine animals and the physical environments that they inhabit, from coastal and continental shelf ecosystems to polar seas and open oceans. Satellite-linked biologgers and ...

    • Assessment of the risk to Norwegian biodiversity from import of wrasses and other cleaner fish for use in aquaculture. Opinion of the Panel on Alien Organisms and Trade in Endangered Species of the Norwegian Scientific Committee for Food and Environment 

      Rueness, Eli Knispel; Berg, Paul Ragnar; Gulla, Snorre; Halvorsen, Kim Aleksander Tallaksen; Järnegren, Johanna; Malmstrøm, Martin; Mo, Tor Atle; Rimstad, Espen; de Boer, Hugo; Eldegard, Katrine; Hindar, Kjetil; Hole, Lars Robert; Kausrud, Kyrre; Kirkendall, Lawrence R.; Måren, Inger Elisabeth; Nilsen, Erlend Birkeland; Thorstad, Eva Bonsak; Nielsen, Anders; Velle, Gaute (VKM Report, Research report, 2019)

    • Efectos del piojo del salmón Lepeophtheirus salmonis(Copepoda: Caligidae) en las poblaciones de truchas (Salmo trutta) de la costa NE Atlántica 

      Lopez, Pablo Arachavala; Thorstad, Eva Bonsak; Todd, Christopher D.; Uglem, Ingebrigt; Bjørn, Pål Arne; Gargan, Patrick G.; Vollset, Knut Wiik; Halttunen, Elina; Kålås, Steinar; Berg, Marius; Finstad, Bengt (Peer reviewed; Journal article, 2015)
      Salmon lice are external parasites on salmonids in the marine environment. During recent years, sea lice abundance has been increased due to the presence of salmon farming using on-growing floating seas-cages. Amongst ...

    • Effects of salmon lice Lepeophtheirus salmonis onwild sea trout Salmo trutta—a literature review 

      Thorstad, Eva Bonsak; Todd, Christopher D.; Uglem, Ingebrigt; Bjørn, Pål Arne; Gargan, Patrick G.; Vollset, Knut Wiik; Halttunen, Elina; Kålås, Steinar; Berg, Marius; Finstad, Bengt (Journal article; Peer reviewed, 2015-08-20)
      Salmon farming increases the abundance of salmon lice, which are ectoparasites of salmonids in the sea. Here we review the current knowledge on the effects of salmon lice on wild sea trout. Salmon lice feed on host mucus, ...

    • Impacts of salmon lice on mortality, marine migration distance and premature return in sea trout 

      Serra Llinares, Rosa Maria; Bøhn, Thomas; Karlsen, Ørjan; Nilsen, Rune; Freitas, Carla; Albretsen, Jon; Haraldstad, Tormod; Thorstad, Eva Bonsak; Elvik, Kristine Marit Schrøder; Bjørn, Pål Arne (Peer reviewed; Journal article, 2020)
      Brown trout Salmo trutta (L.) is a facultative anadromous species, where a portion of individuals in populations with access to the sea perform migrations to use the richer feeding resources. We investigated the effect of ...

    • Long-term variation in numbers and biomass of silver eels being produced in two European river systems 

      Poole, W. Russell; Diserud, Ola Håvard; Thorstad, Eva Bonsak; Durif, Caroline; Dolan, Conor; Sandlund, Odd Terje; Bergesen, Knut Aanestad; Rogan, Gerard; Kelly, Sean D.; Vøllestad, Leif Asbjørn (Journal article; Peer reviewed, 2018)
      The European eel (Anguilla anguilla) population has been in decline at least since the 1960s and reliable regional information, particularly on the spawner production and escapement (i.e. the silver eel life stage), is a ...

    • The major threats to Atlantic salmon in Norway 

      Forseth, Torbjørn; Barlaup, Bjørn Torgeir; Finstad, Bengt; Fiske, Peder; Gjøsæter, Harald; Falkegård, Morten; Hindar, Atle; Mo, Tor Atle; Rikardsen, Audun H.; Thorstad, Eva Bonsak; Vøllestad, Leif Asbjørn; Wennevik, Vidar (Peer reviewed; Journal article, 2017)
      Atlantic salmon (Salmo salar) is an economically and culturally important species. Norway has more than 400 watercourses with Atlantic salmon and supports a large proportion of the world’s wild Atlantic salmon. Atlantic ...

    • Timing and pattern of annual silver eel migration in two European watersheds are determined by similar cues 

      Sandlund, Odd Terje; Diserud, Ola Håvard; Poole, Russell; Bergesen, Knut Aanestad; Dillane, Mary; Rogan, Gerard; Durif, Caroline; Thorstad, Eva Bonsak; Vøllestad, Leif Asbjørn (Peer reviewed; Journal article, 2017)
      Many animals perform long-distance migrations in order to maximize lifetime reproductive success. The European eel migrates several thousand kilometers between their feeding habitats in continental waters (fresh-,brackish, ...