Blar i Scientific publications på forfatter "Sandlund, Odd Terje"

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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-Lux, Rosa H.; Shema, Steven; Vøllestad, Leif Asbjørn (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 ...

    • Alien species and the Water Framework Directive: Recommendations for assessing ecological status in fresh waters in Norway 

      Sandvik, Hanno; Taugbøl, Annette; Bærum, Kim Magnus; Hesthagen, Trygve H.; Jensen, Thomas Correll; Johnsen, Stein Ivar; Sandlund, Odd Terje; Schartau, Ann Kristin (Peer reviewed; Journal article, 2022)
      1. Invasive alien species are recognized as a significant anthropogenic threat to freshwater ecosystems, because they may bring about the local extinction of native species and the collapse of habitat types of special ...

    • Annual and diel activity cycles of a northern population of the large migratory cyprinid fish asp (Leuciscus aspius) 

      Kärgenberg, Einar; Sandlund, Odd Terje; Thorstad, Eva Bonsak; Thalfeldt, Mart; Økland, Finn; Kaasik, Ants; Tambets, Meelis (Peer reviewed; Journal article, 2022)
      Little is known about the exact movement parameters of migratory cyprinids listed as conservation priorities. A northern population of predatory asp, listed on the Bern Convention Appendix III, was studied in a near ...

    • Assessment of the risk to Norwegian biodiversity and aquaculture from pink salmon (Oncorhynchus gorbuscha). Scientific Opinion of the Panel on Alien Organisms and Trade in Endangered Species of the Norwegian Scientific Committee for Food and Environment 

      Hindar, Kjetil; Hole, Lars Robert; Kausrud, Kyrre Linné; Malmstrøm, Martin; Rimstad, Espen; Robertson, Lucy; Sandlund, Odd Terje; Thorstad, Eva Bonsak; Vollset, Knut; de Boer, Hugo; Eldegard, Katrine; Järnegren, Johanna; Kirkendall, Lawrence Richard; Måren, Inger Elisabeth; Nilsen, Erlend Birkeland; Rueness, Eli Knispel; Nielsen, Anders; Velle, Gaute (Peer reviewed; Journal article, 2020)
      The Norwegian Environment Agency and the Norwegian Food Safety Authority asked the Norwegian Scientific Committee for Food and Environment to assess the risk to Norwegian biodiversity, to the productivity of native salmonid ...

    • Behaviour and mortality of downstream migrating Atlantic salmon smolts at a small power station with multiple migration routes 

      Kärgenberg, Einar; Thorstad, Eva Bonsak; Järvekülg, Rein; Sandlund, Odd Terje; Saadre, Ene; Økland, Finn; Thalfeldt, Mart; Tambets, Meelis (Journal article; Peer reviewed, 2019)
      Salmon smolts were released upstream of a run‐of‐river hydropower site and recaptured downstream for inspection. Descending fish behaviour through three possible migration routes (turbines, fishway, spillway) was analysed ...

    • Bias in estimates of electrofishing capture probability of juvenile Atlantic salmon 

      Hedger, Richard David; Diserud, Ola Håvard; Sandlund, Odd Terje; Saksgård, Laila M.; Ugedal, Ola; Bremset, Gunnbjørn (Journal article; Peer reviewed, 2018)
      We evaluated the effect of the total number of passes used, and the application of block nets, on multi-pass electrofishing removal sampling for estimating juvenile Atlantic salmon (Salmo salar L.) abundance and body size ...

    • Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) 

      Tambets, Meelis; Kärgenberg, Einar; Thorstad, Eva Bonsak; Sandlund, Odd Terje; Økland, Finn; Thalfeldt, Mart (Journal article; Peer reviewed, 2018)
      To study the effects of a dispersal barrier on migration of the semi-anadromous vimba bream in the Pärnu River, Estonia, we tagged thirty fish with acoustic transmitters and released above the barrier. Tagged fish showed ...

    • Effects of water level regulation in alpine hydropower reservoirs: an ecosystem perspective with a special emphasis on fish 

      Hirsch, Philipp E.; Eloranta, Antti; Amundsen, Per-Arne; Brabrand, Åge; Charmasson, Julie; Helland, Ingeborg Palm; Power, Michael John; Sanchez-Hernandez, Javier; Sandlund, Odd Terje; Sauterleute, Julian Friedrich; Skoglund, Sigrid Østrem; Ugedal, Ola; Yang, Hong (Journal article; Peer reviewed, 2017)
      Sustainable development of hydropower demands a holistic view of potential impacts of water level regulation (WLR) on reservoir ecosystems. Most environmental studies of hydropower have focused on rivers, whereas environmental ...

    • Femti år etter utsettingene av mysis (Mysis relicta) og firetornet istidskreps (Pallasiola quadrispinosa) i norske innsjøer: til gagn eller skade? 

      Sandlund, Odd Terje; Arnekleiv, Jo Vegar; Hesthagen, Trygve H.; Koksvik, Jan Ivar; Næsje, Tor (Peer reviewed; Journal article, 2022)
      Krepsdyra Mysis relicta (mysis, pungreke) og Pallasiola quadrispinosa (firetornet istidskreps, heretter kalt pallasea) forekommer i Norge naturlig i noen innsjøer på Østlandet. Etter utsettinger i regulerte innsjøer i ...

    • Fiskesamfunnet i Mjøsa; de lange linjer 

      Sandlund, Odd Terje; Gjelland, Karl Øystein; Museth, Jon; Bækkelie, Knut Andreas Eikland; Lie, Erik Friele (Peer reviewed; Journal article, 2021)
      Fiskebestanden i Mjøsa ble undersøkt i 2018 som en del av overvåkingen av store innsjøer under vannforskriften. Det ble fisket med nordiske oversiktsgarn i strandsona og dypere bunnområder og med el-fiskebåt på grunt vann. ...

    • Infection by the cestodes Triaenophorus crassus and Diphyllobothrium spp. in a polymorphic whitefish population 

      Sandlund, Odd Terje; Næsje, Tor; Diserud, Ola Håvard (Peer reviewed; Journal article, 2021)
      The whitefish (Coregonus lavaretus s.l.) stock in Lake Femunden, Norway, includes three morphs: deepwater spawning (D-), river spawning (R-) and shallow water spawning (S-) whitefish. Infections by Diphyllobothrium spp. ...

    • Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake 

      Eloranta, Antti; Johnsen, Stein Ivar; Power, Michael; Bærum, Kim Magnus; Sandlund, Odd Terje; Finstad, Anders Gravbrøt; Rognerud, Sigurd; Museth, Jon (Journal article; Peer reviewed, 2018)
      Invasive and introduced fishes can affect recipient ecosystems and native species via altered competitive and predatory interactions, potentially leading to top-down and bottom-up cascading impacts. Here, we describe a ...

    • Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs 

      Knudsen, Rune; Eloranta, Antti; Siwertsson, Anna; Paterson, Rachel A.; Power, Michael; Sandlund, Odd Terje (Peer reviewed; Journal article, 2019)
      Niche diversification of polymorphic Arctic charr can be altered by multiple anthropogenic stressors. The opossum-shrimp (Mysis relicta) was introduced to compensate for reduced food Resources for fish following hydropower ...

    • 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 ...

    • Migration, growth patterns, and diet of pike (Esox lucius) in a riverreservoir and its inflowing river 

      Sandlund, Odd Terje; Museth, Jon; Øistad, Sondre (Journal article; Peer reviewed, 2015)
      The pike population in the Løpsjøen reservoir and the accessible 21 km section of the inflowing RiverRena was investigated from 2003 to 2013. Telemetry and mark-recapture with Floy tags demonstratedthat most fish had an ...

    • Mismatch between fishway operation and timing of fish movements: a risk for cascading effects in partial migration systems 

      van Leeuwen, Casper; Museth, Jon; Sandlund, Odd Terje; Qvenild, Tore; Vøllestad, Leif Asbjørn (Peer reviewed; Journal article, 2016)
      Habitat fragmentation is a growing problem worldwide. Particularly in river systems, numerous dams and weirs hamper the movement of a wide variety of species. With the aim to preserve connectivity for fish, many barriers ...

    • Omfattende spredning og bekjempelse av gjedde i Trøndelag 

      Hesthagen, Trygve H.; Rikstad, Anton; Adolfsen, Pål; Sandlund, Odd Terje; Bardal, Helge; Bergan, Morten Andre; Berger, Hans Mack; Finstad, Anders Gravbrøt; Olsen, Kay-Arne; Nøst, Terje; Sandodden, Roar; Sivertsgård, Rolf; Slettom, Lars (Journal article, 2020)
      I Trøndelag er gjedda naturlig utbredt bare i Murusjøen i Muruelvvassdraget i nordøst og i noen lokaliteter i Trysilelvvassdraget i sør. Helt siden middelalderen har mennesker spredt gjedde i fylket, men spesielt i løpet ...

    • 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 ...

    • 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 ...

    • Species interactions, environmental gradients and body size shape population niche width 

      Eloranta, Antti; Finstad, Anders Gravbrøt; Sandlund, Odd Terje; Knudsen, Rune; Kuparinen, Anna; Amundsen, Per-Arne (Peer reviewed; Journal article, 2021)
      1. Competition for shared resources is commonly assumed to restrict population-level niche width of coexisting species. However, the identity and abundance of coexisting species, the prevailing environmental conditions, ...