Blar i NTNU Open på forfatter "Thorstad, Eva Bonsak"

Viser treff 21-31 av 31

    • Novel large-scale mapping highlights poor state of sea trout populations 

      Fiske, Peder; Forseth, Torbjørn; Thorstad, Eva Bonsak; Bakkestuen, Vegar; Einum, Sigurd; Falkegård, Morten; Garmo, Øyvind A.; Garseth, Åse Helen; Skoglund, Helge; Solberg, Monica Favnebøe; Utne, Kjell Rong; Vollset, Knut; Vøllestad, Leif Asbjørn; Wennevik, Vidar (Peer reviewed; Journal article, 2024)
      1. The state of sea trout in 1251 Norwegian watercourses was assessed based on a scoring system for human pressures, abundance data, and local knowledge. 2. Over 16,000 km of rivers and lakes were available to sea trout ...

    • One Hundred Pressing Questions on the Future of Global Fish Migration Science, Conservation, and Policy 

      Lennox, Robert J.; Paukert, Craig P.; Aarestrup, Kim; Auger-Méthé, Marie; Baumgartner, Lee; Birnie-Gauvin, Kim; Bøe, Kristin; Brink, Kerry; Brownscombe, Jacob W.; Chen, Yushun; Davidsen, Jan Grimsrud; Eliason, Erika J.; Filous, Alexander; Gillanders, Bronwyn M.; Helland, Ingeborg Palm; Horodysky, Andrij Z.; Januchowski-Hartley, Stephanie R.; Lowerre-Barbieri, Susan K.; Lucas, Martyn C.; Martins, Eduardo G.; Murchie, Karen J.; Pompeu, Paulo S.; Power, Michael; Raghavan, Rajeev; Rahel, Frank J.; Secor, David; Thiem, Jason D.; Thorstad, Eva Bonsak; Ueda, Hiroshi; Whoriskey, Frederick G.; Cooke, Steven J. (Journal article; Peer reviewed, 2019)
      Migration is a widespread but highly diverse component of many animal life histories. Fish migrate throughout the world’s oceans, within lakes and rivers, and between the two realms, transporting matter, energy, and other ...

    • Predation of Atlantic salmon across ontogenetic stages and impacts on populations 

      Falkegård, Morten; Lennox, Robert; Thorstad, Eva Bonsak; Einum, Sigurd; Fiske, Peder; Garmo, Øyvind Aaberg; Garseth, Åse Helen; Skoglund, Helge; Solberg, Monica Favnebøe; Utne, Kjell Rong; Vollset, Knut; Vøllestad, Leif Asbjørn; Wennevik, Vidar; Forseth, Torbjørn (Peer reviewed; Journal article, 2023)
      Managers and stakeholders increasingly ask whether predation is a driving force behind the poor status of many species, and whether predator control is likely to be a successful management action to intervene. We review ...

    • Redefining the oceanic distribution of Atlantic salmon 

      Rikardsen, Audun H.; Righton, David; Strøm, John Fredrik; Thorstad, Eva Bonsak; Gargan, Patrick G.; Sheehan, Timothy F.; Økland, Finn; Chittenden, Cedar; Hedger, Richard David; Næsje, Tor; Renkawitz, Mark; Sturlaugsson, Johannes; Caballero, Pablo; Baktoft, Henrik; Davidsen, Jan Grimsrud; Halttunen, Elina; Wright, Serena; Finstad, Bengt; Aarestrup, Kim (Peer reviewed; Journal article, 2021)
      Determining the mechanisms driving range-wide reductions in Atlantic salmon marine survival is hindered by an insufcient understanding of their oceanic ecology and distribution. We attached 204 pop-up satellite archival ...

    • Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences 

      Jensen, Arne Johan; Finstad, Bengt; Fiske, Peder; Diserud, Ola Håvard; Thorstad, Eva Bonsak (Journal article; Peer reviewed, 2020)
      Consistent individual differences in behavior have been demonstrated for many animals, but there are few studies of consequences of such repeated behavior in the wild. We tested consistency in migration timing to and from ...

    • 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 ...

    • Småblanken i Namsenvassdraget - faglig grunnlag for handlingsplan 

      Thorstad, Eva Bonsak; Berg, Ole Kristian; Hesthagen, Trygve H.; Hindar, Kjetil; Norum, Ine Cecilie Jordalen; Sandlund, Odd Terje; Saksgård, Laila M. (NINA rapport;660, Research report, 2011)
      Denne rapporten om småblanken i Namsenvassdraget gir en oppsummering av nåværende kunnskap om denne spesielle laksestammen. Rapporten er utarbeidet på oppdrag fra Fylkesmannen i Nord-Trøndelag som et faglig grunnlag for ...

    • Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation 

      Sandlund, Odd Terje; Karlsson, Sten; Thorstad, Eva Bonsak; Berg, Ole Kristian; Kent, Matthew Peter; Norum, Ine Cecilie Jordalen; Hindar, Kjetil (Journal article; Peer reviewed, 2014)
      The river-resident Salmo salar (“småblank”) has been isolated from other Atlantic salmon populations for 9,500 years in upper River Namsen, Norway. This is the only European Atlantic salmon population accomplishing its ...

    • Status for småblankbestanden i Namsen 

      Thorstad, Eva Bonsak; Hindar, Kjetil; Berg, Ole Kristian; Saksgård, Laila M.; Norum, Ine Cecilie Jordalen; Sandlund, Odd Terje; Hesthagen, Trygve H.; Lehn, Lars Ove (NINA Rapport;403, Research report, 2009)
      Småblanken, som finnes kun i Namsenvassdraget, er den eneste bestanden av ferskvannsstasjonær laks i Europa som lever hele livet i elva og ikke har vandringer til innsjøer. Her utredes status for bestanden basert på 1) ...

    • Vandringer og habitatbruk til småblank 

      Davidsen, Jan Grimsrud; Eikås, Linda; Hedger, Richard David; Rønning, Lars; Sjursen, Aslak Darre; Thorstad, Eva Bonsak; Berg, Ole Kristian; Bremset, Gunnbjørn; Karlsson, Sten; Sundt-Hansen, Line Elisabeth Breivik (NTNU Vitenskapsmuseet naturhistorisk rapport;, Research report, 2018)
      Småblank er den eneste rent elvelevende laksen i Europa, og finnes kun i øvre deler av Nam-senvassdraget. Størrelsen på bestanden er ukjent, men det er grunn til at tro at bestandstettheten har gått ned siden 1950- tallet, ...

    • Ørekyt i Namsenvassdraget. Utbredelse, spredningsrisiko og tiltak 

      Thorstad, Eva Bonsak; Sandlund, Odd Terje; Heggberget, Tor Gravråk; Finstad, Anders Gravbrøt; Museth, Jon; Berger, Hans Mack; Hesthagen, Trygve H.; Berg, Ole Kristian (NINA rapport;155, Research report, 2006)
      Undersøkelser i Namsenvassdraget i 2005 viste at ørekyt forekommer i tette bestander i innsjøer og flyer øverst i vassdraget. I Otersjøen øverst i Sanddøla har ørekyt forekommet i solide bestander siden 1960-tallet. I ...