Blar i Scientific publications på forfatter "Forseth, Torbjørn"

Viser treff 1-18 av 18

    • Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls 

      Lennox, Robert J.; Thorstad, Eva Bonsak; Diserud, Ola Håvard; Økland, Finn; Cooke, Steven J.; Aasestad, Ingar; Forseth, Torbjørn (Journal article; Peer reviewed, 2018)
      The spawning migration of Atlantic salmon has been characterized by tracking salmon carrying electronic tags as they ascend rivers, but still little is known about how natural obstacles such as waterfalls influence migratory ...

    • Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival? 

      Baktoft, Henrik; Gjelland, Karl Øystein; Szabo-Meszaros, Marcell; Silva, Ana T.; Riha, Milan; Økland, Finn; Alfredsen, Knut; Forseth, Torbjørn (Peer reviewed; Journal article, 2020)
      Repeat spawners constitute an important component of Atlantic salmon populations, but survival of post-spawning individuals (kelts) are often compromised by anthropogenic structures such as hydropower plants (HPPs). Potential ...

    • Considering sampling bias in close-kin mark–recapture abundance estimates of Atlantic salmon 

      Wacker, Sebastian; Skaug, Hans Julius; Forseth, Torbjørn; Solem, Øyvind; Ulvan, Eva Marita; Fiske, Peder; Karlsson, Sten (Peer reviewed; Journal article, 2021)
      Genetic methods for the estimation of population size can be powerful alternatives to conventional methods. Close-kin mark–recapture (CKMR) is based on the principles of conventional mark–recapture, but instead of being ...

    • Density independent use of shallow riverine areas in juvenile Atlantic salmon 

      Puffer, Michael; Berg, Ole Kristian; Hamnes, Frøydis Bolme; Bentsen, Vidar; Koch, Wouter; Ugedal, Ola; Forseth, Torbjørn; Arnekleiv, Jo Vegar; Einum, Sigurd (Journal article; Peer reviewed, 2018)
      Habitat use of aquatic organisms is essential to evaluate effects of many environmental challenges like effects of hydro-power regulation, where stranding may occur under hydropeaking (rapid dewatering of shallow river ...

    • Experimental hydraulics on fish-friendly trash-racks: an ecological approach 

      Szabo-Meszaros, Marcell; Navaratnam, Christy Ushanth; Aberle, Jochen; Silva, Ana T.; Forseth, Torbjørn; Calles, Olle; Fjeldstad, Hans-Petter; Alfredsen, Knut (Journal article; Peer reviewed, 2018)

    • Experimental hydraulics on fish-friendly trash-racks: an ecological approach 

      Szabo-Meszaros, Marcell; Navaratnam, Christy Ushanth; Aberle, Jochen; Silva, Ana T.; Forseth, Torbjørn; Calles, Olle; Fjeldstad, Hans-Petter; Alfredsen, Knut (Journal article; Peer reviewed, 2018)

    • Hva om Hunderørret var laks 

      Kraabøl, Morten; Johnsen, Stein Ivar; Forseth, Torbjørn; Museth, Jon; Skurdal, Jostein (Peer reviewed; Journal article, 2012)
      Storørret defineres som en selvreproduserende stamme med regulær forekomst av store fiskespisende individer, ofte med et nisjeskift og markert vekstomslag ved overgangen til fiskediett. Den mest kjente storørretstammen her ...

    • Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon 

      Teichert, Maxim; Foldvik, Anders; Einum, Sigurd; Finstad, Anders Gravbrøt; Forseth, Torbjørn; Ugedal, Ola (Journal article; Peer reviewed, 2017)
      Competition for limited resources and the resulting density-dependent processes are key factors in driving stream salmonid population dynamics. Here we test for the combined effects of density and shelter availability on ...

    • Modelling climate change effects on Atlantic salmon: Implications for mitigation in regulated rivers 

      Sundt-Hansen, Line Elisabeth Breivik; Hedger, Richard David; Ugedal, Ola; Diserud, Ola Håvard; Finstad, Anders G.; Sauterleute, Julian Friedrich; Tøfte, Lena S.; Alfredsen, Knut; Forseth, Torbjørn (Peer reviewed; Journal article, 2018)
      Climate change is expected to alter future temperature and discharge regimes of rivers. These regimes have a strong influence on the life history of most aquatic river species, and are key variables controlling the growth ...

    • Modelling the effect of hydropeaking‐induced stranding mortality on Atlantic salmon population abundance 

      Hedger, Richard David; Sauterleute, Julian Friedrich; Sundt-Hansen, Line Elisabeth Breivik; Forseth, Torbjørn; Ugedal, Ola; Diserud, Ola Håvard; Bakken, Tor Haakon (Journal article; Peer reviewed, 2018)
      Studies of hydropeaking‐induced stranding mortality on fish populations have been confined to analysis of empirical data and/or short‐term hydraulic‐habitat modelling of individual events and are thus limited as to how ...

    • 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 ...

    • Pink salmon in Norway: the reluctant invader 

      Sandlund, Odd Terje; Berntsen, Henrik Hårdensson; Fiske, Peder; Kuusela, Jorma; Muladal, Rune; Niemelä, Eero; Uglem, Ingebrigt; Forseth, Torbjørn; Mo, Tor Atle; Thorstad, Eva B.; Veselov, Alexey E.; Vollset, Knut Wiik; Zubchenko, Alexander V. (Peer reviewed; Journal article, 2018)
      In 2017, Norway experienced an invasion of the Pacific salmonid pink salmon (Oncorhynchus gorbuscha) in numbers never before seen in rivers all along the coast. Significant numbers were also caught in other parts of ...

    • 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 ...

    • 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 ...

    • Relationship between marine growth and sea survival of two anadromous salmonid fish species 

      Jensen, Arne Johan; Finstad, Bengt; Fiske, Peder; Forseth, Torbjørn; Rikardsen, Audun H.; Ugedal, Ola (Journal article; Peer reviewed, 2017)
      This study found empirical evidence supporting the “growth–survival” paradigm in the marine phase of Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta). The paradigm postulates that larger or faster-growing ...

    • Temporal shifts in the marine feeding of individual Atlantic salmon inferred from scale isotope ratios 

      Power, Michael; Thorstad, Eva Bonsak; Forseth, Torbjørn; Fiske, Peder (Peer reviewed; Journal article, 2023)
      Given the limited information on prey use during the marine residency period for Atlantic salmon, scales were collected from salmon at return to the River Namsen (Norway) for spawning after 1 year at sea, and scale material ...

    • The effects of hydrodynamics on the three-dimensional downstream migratory movement of Atlantic salmon 

      Silva, Ana T.; Bærum, Kim Magnus; Hedger, Richard David; Baktoft, Henrik; Fjeldstad, Hans-Petter; Gjelland, Karl Øystein; Økland, Finn; Forseth, Torbjørn (Journal article; Peer reviewed, 2019)
      Anthropogenic structures in rivers are major threats for fish migration and effective mitigation is imperative given the worldwide expansion of such structures. Fish behaviour is strongly influenced by hydrodynamics, but ...

    • The future of fish passage science, engineering, and practice 

      Silva, Ana T.; Lucas, Martyn C.; Castro-Santos, Theodore; Katopodis, Christos; Baumgartner, Lee J.; Thiem, Jason D.; Aarestrup, Kim; Pompeu, Paulo S.; O'Brien, Gordon C.O.; Braun, Douglas C.; Burnett, Nicholas J.; Zhu, David Z.; Fjeldstad, Hans-Petter; Forseth, Torbjørn; Rajaratnam, Nallamuthu; Williams, John G.; Cooke, Steven J. (Journal article; Peer reviewed, 2017)