Blar i NINA Brage på forfatter "Thorstad, Eva Bonsak"

Viser treff 41-60 av 81

    • Keeping close to the river, shore and surface: the first marine migration of brown trout (Salmo trutta) and Arctic charr (Salvelinus alpinus) post-smolts 

      Atencio, Benjamin J.; Thorstad, Eva Bonsak; Rikardsen, Audun H.; Jensen, Jenny Lovisa Alexandra (Peer reviewed; Journal article, 2021)
      anadromous, charr, fjord, marine, migration, post-smolt, salmonid, trout

    • Kunnskapsoppsummering om ål og forslag til overvåkingssystem i norske vassdrag 

      Thorstad, Eva Bonsak; Larsen, Bjørn Mejdell; Finstad, Bengt; Hesthagen, Trygve H.; Hvidsten, Nils Arne; Johnsen, Bjørn Ove; Næsje, Tor; Sandlund, Odd Terje (NINA Rapport;661, Research report, 2011)
      Thorstad, E.B., Larsen, B.M., Finstad, B., Hesthagen, T., Hvidsten, N.A., Johnsen, B.O., Næsje, T.F. & Sandlund, O.T. 2011. Kunnskapsoppsummering om ål og forslag til overvåkingssystem i norske vassdrag. - NINA Rapport ...

    • Laksen i Numedalslågen. Evaluering av manøvreringsreglement 

      Sundt-Hansen, Line Elisabeth Breivik; Forseth, Torbjørn; Kvingedal, Eli; Thorstad, Eva Bonsak; Larsen, Bjørn Mejdell; Hvidsten, Nils Arne; Fiske, Peder (NINA Rapport;793, Research report, 2012)
      I 2001 ble det gitt ny konsesjon for fortsatt regulering av Numedalslågen. Fornyet konsesjon medførte et nytt manøvreringsreglement, hvor hensynet til laks ble spesielt vektlagt. Som et ledd i å oppfylle konsesjonsvilkårene, ...

    • 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 ...

    • Mer storlaks i Namsenvassdraget. Vurdering av fiskeforsterkende tiltak 

      Bremset, Gunnbjørn; Thorstad, Eva Bonsak; Fiske, Peder; Lund, Roar Asbjørn; Heggberget, Tor Gravråk (NINA Rapport;286, Research report, 2007)
      Gunnbjørn Bremset, Eva B. Thorstad, Peder Fiske, Roar A. Lund og Tor G. Heggberget. Mer storlaks i Namsenvassdraget. Vurdering av fiskeforsterkende tiltak - NINA Rapport 286. 57 s. På oppdrag av Namsenvassdragets ...

    • Mortality of Atlantic salmon after catch and release angling: assessment of a recreational Atlantic salmon fishery in a changing climate 

      Van Leeuwen, Travis E.; Dempson, J. Brian; Burke, Chantelle M.; Kelly, Nicholas I.; Robertson, Martha J.; Lennox, Robert J.; Havn, Torgeir Børresen; Svenning, Martin; Hinks, Ross; Guzzo, Matthew M.; Thorstad, Eva Bonsak; Purchase, Craig F.; Bates, Amanda E. (Peer reviewed; Journal article, 2020)
      Human activities have the potential to accelerate population-level decline by contributing to climate warming and decreasing the capacity of species to survive warming temperatures. Here we build a predictive model to test ...

    • Movements and area use by small spotted grunter (Pomadasys commersonnii) in the Great Fish Estuary (South Africa): implication for management 

      Næsje, Tor; Childs, AR; Cowley, P.D.; Thorstad, Eva Bonsak; Økland, Finn; Weerts, S.; Buthelezi, P. (NINA Rapport;55, Research report, 2005)
      Næsje, T.F., Childs, A.R., Cowley, P.D., Thorstad, E.B., Økland, F., Weerts, S., and Buthelezi, P. 2005. Movements and area use by small spotted grunter (Pomadasys commersonnii) in the Great Fish Estuary (South Africa): ...

    • Movements of dead fish in rivers 

      Havn, Torgeir Børresen; Økland, Finn; Teichert, Maxim A.K.; Heermann, L.; Borcherding, J; Sæther, Stein Are; Tambets, M.; Diserud, Ola Håvard; Thorstad, Eva Bonsak (Journal article; Peer reviewed, 2017)
      Background: The aim of telemetry studies is often to determine the fate and mortality rates of ish. A moving ish is usually regarded as alive and a long-term stationary ish as dead—and the site where it became stationary ...

    • Movements of female lumpsucker Cyclopterus lumpus in a Norwegian fjord during the spawning period 

      Mitamura, Hiromichi; Thorstad, Eva Bonsak; Uglem, Ingebrigt; Bjørn, Pål Arne; Økland, Finn; Næsje, Tor; Dempster, Tim; Arai, Nobuaki (NINA Rapport;288, Research report, 2007)
      Mitamura, H., Uglem, I., Thorstad, E.B., Bjørn, P.A., Økland, F., Næsje, T.F., Dempster, T. & Arai, N. 2007. Movements of female lumpsucker Cyclopterus lumpus in a Norwegian fjord during the spawning period. - NINA Report ...

    • 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 ...

    • Oppvandring av laks i Numedalslågen. Påvirker vannføring og andre miljøfaktorer passering av naturlige oppvandringshindre? 

      Thorstad, Eva Bonsak; Økland, Finn; Aasestad, Ingar; Diserud, Ola Håvard; Forseth, Torbjørn (NINA Rapport;360, Research report, 2008)
      Thorstad, E.B., Økland, F., Aasestad, I., Diserud, 0. & Forseth, T. 2008. Oppvandring av laks i Numedalslågen - Hvordan påvirker vannføring og andre miljøfaktorer passering ved naturlige oppvandringshindre? - NINA Rapport ...

    • Oppvandring og fordeling av laks i Osenvassdraget i Molde kommune: Resultater fra undersøkelser i 2014 

      Ulvan, Eva Marita; Bremset, Gunnbjørn; Aronsen, Tonje; Thorstad, Eva Bonsak; Solem, Øyvind; Økland, Finn; Havn, Torgeir Børresen (NINA Rapport;1184, Research report, 2015-07-01)
      Ulvan, E.M., Bremset, G., Aronsen, T., Thorstad, E.B., Solem, Ø., Økland, F., Havn, T. B. 2015. Oppvandring og fordeling av laks i Osenvassdraget i Molde kommune: Resultater fra undersøkelser i 2014. - NINA Rapport 1184. ...

    • Oppvandring, bestandsstørrelse og fangstrater av laks i Målselvvassdraget 

      Svenning, Martin; Johansen, Narve S.; Thorstad, Eva Bonsak (NINA rapport;648, Research report, 2011)
      Svenning, M-A., Johansen, N.S. & Thorstad, E.B. 2011. Oppvandring, bestandsstørrelse og fangstrater av laks i Målselvvassdraget - NINA Rapport 648. 45 s. Sommeren 2009, fra 7. juni-14. august, ble det fisket med kilenøter ...

    • Påvirker vannføringen i Eira fjordvandringen av postsmolt laks? Telemetriundersøkelser i 2002, 2004 og 2006 

      Thorstad, Eva Bonsak; Uglem, Ingebrigt; Økland, Finn; Finstad, Bengt; Sivertsgård, Rolf; Jensen, Arne Johan (NINA Rapport;253, Research report, 2007)
      Thorstad, E.B., Uglem, I., Økland, F., Finstad, B., Sivertsgård, R. & Jensen, A.J. 2007. Påvirker vannføringen i Eira fjordvandringen av postsmolt laks? Telemetriundersøkelser i 2002, 2004 og 2006. - NINA Rapport 253. 40 ...

    • The pink salmon invasion: a Norwegian perspective 

      Mo, Tor Atle; Thorstad, Eva Bonsak; Sandlund, Odd Terje; Berntsen, Johan Henrik Hårdensson; Fiske, Peder; Uglem, Ingebrigt (Peer reviewed; Journal article, 2018)
      In the period 1956–1979, more than 220 million of pink salmon Oncorhynchus gorbuscha (Walbaum 1792) eggs from the southern part of Sakhalin Island in the Pacific Ocean were transported to the northwestern part of Russia ...

    • 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 ...

    • Prospects for the future of pink salmon in three oceans: From the native Pacific to the novel Arctic and Atlantic 

      Lennox, Robert; Berntsen, Johan Henrik Hårdensson; Garseth, Åse Helen; Hinch, Scott G.; Hindar, Kjetil; Ugedal, Ola; Utne, Kjell Rong; Vollset, Knut Wiik; Whoriskey, Frederick G.; Thorstad, Eva Bonsak (Peer reviewed; Journal article, 2023)
      While populations of other migratory salmonids suffer in the Anthropocene, pink salmon (Oncorhynchus gorbusca Salmonidae) are thriving, and their distribution is expanding both within their natural range and in the Atlantic ...

    • The quest for successful Atlantic salmon restoration: perspectives, priorities, and maxims 

      Lennox, Robert; Alexandre, Carlos M; Almeida, Pedro R; Bailey, Kevin M.; Barlaup, Bjørn Torgeir; Bøe, Kristin; breukelaar, Andre; Erkinaro, Jaakko; Forseth, Torbjørn; Gabrielsen, Sven-Erik; Halfyard, Edmund; Hanssen, Erlend Mjelde; Karlsson, Sten; Koch, Stephanie; Koed, Anders; Langåker, Roy, M; Lo, Håvard; Lucas, Martyn C.; Mahlum, Shad Kenneth; Perrier, Charles; Pulg, Ulrich; Sheehan, Timothy F.; Skoglund, Helge; Svenning, Martin; Thorstad, Eva Bonsak; Velle, Gaute; Whoriskey, Frederick G.; Vollset, Knut (Peer reviewed; Journal article, 2021)
      Atlantic salmon is often a focal species of restoration efforts throughout the north Atlantic and it is therefore an excellent case study for how best to design programmes to address and mitigate threats and correct ...

    • Recommendations on size and position of surgically and gastrically implanted electronic tags in European silver eel 

      Økland, Finn; Thorstad, Eva Bonsak (Peer reviewed; Journal article, 2013)
      Background: Information on European silver eel Anguilla anguilla anatomy was collected to gain information on limitations on size and placement of electronic tags. Findings: To reduce the eel’s ability to bite its own ...