Browsing NINA Brage by Author "Einum, Sigurd"

Now showing items 1-11 of 11

    • 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 ...

    • Effekter av ekstremflom på kunstig etablerte gyteområder og fisketetthet i Gråelva, Nord-Trøndelag 

      Einum, Sigurd; Berger, Hans Mack; Fjeldstad, Hans-Petter (NINA Rapport;220, Research report, 2006)
      Einum S., Berger, H. M. og Fjeldstad, H.- P. 2006. Effekter av ekstremflom på kunstig etablerte gyteområder og fisketetthet i Gråelva, Nord-Trøndelag. NINA Rapport 220, 30 s. I Gråelva har man siden 1992 gjennomført ...

    • Environmental change and the rate of phenotypic plasticity 

      Burton, Tim; Ratikainen, Irja Ida; Einum, Sigurd (Peer reviewed; Journal article, 2022)
      With rapid and less predictable environmental change emerging as the ‘new norm’, understanding how individuals tolerate environmental stress via plastic, often reversible changes to the phenotype (i.e., reversible phenotypic ...

    • Evolutionary change in metabolic rate of Daphnia pulicaria following invasion by the predator Bythotrephes longimanus 

      Rani, Varsha; Burton, Tim; Walsh, Matthew; Einum, Sigurd (Peer reviewed; Journal article, 2022)
      Metabolic rate is a trait that may evolve in response to the direct and indirect effects of predator-induced mortality. Predators may indirectly alter selection by lowering prey densities and increasing resource availability ...

    • Handbook for environmental design in regulated salmon rivers 

      Forseth, Torbjørn; Harby, Atle; Ugedal, Ola; Pulg, Ulrich; Fjeldstad, Hans-Petter; Robertsen, Grethe; Barlaup, Bjørn Torgeir; Alfredsen, Knut; Sundt, Håkon; Saltveit, Svein Jakob; Skoglund, Helge; Kvingedal, Eli; Sundt-Hansen, Line Elisabeth Breivik; Finstad, Anders; Einum, Sigurd; Arnekleiv, Jo Vegar (NINA Special Report;53, Book, 2014)
      Forseth, T. & Harby, A. (eds.). 2014. Handbook for environmental design in regulated salmon rivers. - NINA Special Report 53. 90 pp.

    • Insights into the quantification and reporting of model-related uncertainty across different disciplines 

      Simmonds, Emily Grace; Dunn-Sigouin, Etienne; Adjei, Kwaku Peprah; Andersen, Christoffer Wold; Aspheim, Janne Cathrin Hetle; Battistin, Claudia; Bulso, Nicola; Christensen, Hannah M.; Cretois, Benjamin; Cubero, Ryan John Abat; Davidovich, Ivan Andres; Dickel, Lisa; Dunn, Benjamin Adric; Dyrstad, Karin; Einum, Sigurd; Giglio, Donata; Gjerløw, Haakon; Godefroidt, Amélie; González-Gil, Ricardo; Gonzalo Cogno, Soledad; Große, Fabian; Halloran, Paul; Jensen, Mari Fjalstad; Kennedy, John James; Langsæther, Peter Egge; Laverick, Jack H; Lederberger, Debora; Li, Camille; Mandeville, Elizabeth G; Mandeville, Caitlin; Moe, Espen; Schröder, Tobias Navarro; Nunan, David; Sicacha-Parada, Jorge; Simpson, Melanie Rae; Skarstein, Emma Sofie; Spensberger, Clemens; Stevens, Richard; Subramanian, Aneesh C.; Svendsen, Lea; Theisen, Ole Magnus; Watret, Connor; O'Hara, Robert B. (Peer reviewed; Journal article, 2022)
      Quantifying uncertainty associated with our models is the only way we can ex- press how much we know about any phenomenon. Incomplete consideration of model-based uncertainties can lead to overstated conclusions with ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Spatial variation in the relationship between performance and metabolic rate in wild juvenile Atlantic salmon 

      Robertsen, Grethe; Armstrong, JD; Nislow, KH; Herfindal, Ivar; Mckelvey, S; Einum, Sigurd (Journal article; Peer reviewed, 2014)

    • Status for norske laksebestander i 2023 

      Forseth, Torbjørn; Einum, Sigurd; Fiske, Peder; Falkegård, Morten; Garmo, Øyvind A.; Garseth, Åse Helen; Skoglund, Helge; Solberg, Monica F.; Thorstad, Eva B.; Utne, Kjell Rong; Vollset, Knut Wiik; Vøllestad, Asbjørn; Wennevik, Vidar (Rapport fra Vitenskapelig råd for lakseforvaltning;18, Report, 2023)
      Lakseinnsiget, som er antall laks som hvert år kommer tilbake som gytefisk fra havet til Norge, var blant de laveste som noen gang er registrert også i 2022, men litt høyere enn bunnåret 2021. Mengden laks som hvert år ...