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Bilde av Kristoffersen, Roar
Bilde av Kristoffersen, Roar
Associate professor Department of Arctic and Marine Biology roar.kristoffersen@uit.no +4777645111 95208950 Tromsø

Roar Kristoffersen

  • Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Eirik H. Henriksen, Aslak Smalås, Raul Primicerio et al.:
    Takvatnprosjektet – vellykket samarbeid mellom forskere og fiskeentusiaster
    Vann 2024
  • Miroslava Soldánová, Petra Kundid, Tomas Scholz, Roar Kristoffersen, Rune Knudsen :
    Somatic Dimorphism in Cercariae of a Bird Schistosome
    Pathogens 2022 ARKIV / DOI
  • Miroslava Soldánová, Ana Born-Torrijos, Roar Kristoffersen, Rune Knudsen, Per-Arne Amundsen, Tomas Scholz :
    Cercariae of a Bird Schistosome Follow a Similar Emergence Pattern under Different Subarctic Conditions: First Experimental Study
    Pathogens 2022 ARKIV / DOI
  • Ana Born-Torrijos, Gabrielle S. Van Beest, Tereza Vyhlídalová, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen et al.:
    Taxa-specific activity loss and mortality patterns in freshwater trematode cercariae under subarctic conditions
    Parasitology 2021 ARKIV / DOI
  • Ana Born-Torrijos, Rachel Paterson, Gabrielle van Beest, Tereza Vyhlídalová, Eirik Haugstvedt Henriksen, Rune Knudsen et al.:
    Cercarial behaviour alters the consumer functional response of three-spined sticklebacks
    Journal of Animal Ecology 2021 ARKIV / DOI
  • Ana Born-Torrijos, Rachel Paterson, Gabrielle van Beest, Jessica Schwelm, Tereza Vyhlídalová, Eirik Haugstvedt Henriksen et al.:
    Temperature does not influence functional response of amphipods consuming different trematode prey
    Parasitology Research 2020 ARKIV / DOI
  • Svetlana Murzina, Sergey G. Sokolov, Svetlana N. Pekkoeva, Evgeny P. Ieshko, Nina N. Nemova, Roar Kristoffersen et al.:
    First data on the parasite fauna of daubed shanny Leptoclinus maculatus (Fries 1838) (Actinopterygii, Perciformes: Stichaeidae) in Svalbard waters
    Polar Biology 2019 DOI
  • Eirik Haugstvedt Henriksen, André Frainer, Rune Knudsen, Roar Kristoffersen, Armand M. Kuris, Kevin D. Lafferty et al.:
    Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density-dependent transmission
    Journal of Applied Ecology 2019 ARKIV / DOI
  • Per-Arne Amundsen, Raul Primicerio, Aslak Smalås, Eirik Haugstvedt Henriksen, Rune Knudsen, Roar Kristoffersen et al.:
    Long-term ecological studies in northern lakes – challenges, experiences and accomplishments
    Limnology and Oceanography 2018 ARKIV / DOI
  • Rune Knudsen, Eirik Haugstvedt Henriksen, Karl Øystein Gjelland, Haakon Hansen, Ditte Katrine Hendrichsen, Roar Kristoffersen et al.:
    Are hybrids between Atlantic salmon and brown trout suitable long-term hosts of Gyrodactylus salaris during winter?
    Journal of Fish Diseases 2017 DOI
  • Jesper Andreas Kuhn, André Frainer, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Effects of fish species composition on Diphyllobothrium spp. infections in subarctic brown trout - is three-spined stickleback a key species?
    Journal of Fish Diseases 2016 ARKIV / DOI
  • Jesper Andreas Kuhn, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    A simplified method to estimate Diphyllobothrium spp. infection in salmonids
    Journal of Fish Diseases 2016 DOI
  • Jesper Andreas Kuhn, Rune Knudsen, Roar Kristoffersen, Raul Primicerio, Per-Arne Amundsen :
    Temporal changes and between-host variation in the intestinal parasite community of Arctic charr in a subarctic lake
    Hydrobiologia 2016 ARKIV / DOI
  • Eirik Haugstvedt Henriksen, Rune Knudsen, Roar Kristoffersen, Armand M. Kuris, Kevin D. Lafferty, Anna Siwertsson et al.:
    Ontogenetic dynamics of infection with Diphyllobothrium spp. cestodes in sympatric Arctic charr Salvelinus alpinus (L.) and brown trout Salmo trutta L.
    Hydrobiologia 2015 ARKIV / DOI
  • Ditte Katrine Hendrichsen, Roar Kristoffersen, Karl Øystein Gjelland, Rune Knudsen, Stefan Kusterle, Audun H. Rikardsen et al.:
    Transmission dynamics of the monogenean Gyrodactylus salaris under seminatural conditions
    Journal of Fish Diseases 2015 ARKIV / DOI
  • Jesper Andreas Kuhn, Roar Kristoffersen, Rune Knudsen, Jonas Jakobsen, D. J. Marcogliese, S. A. Locke et al.:
    Parasite communities of two three-spined stickleback populations in subarctic Norway—effects of a small spatial-scale host introduction
    Parasitology Research 2015 ARKIV / DOI
  • Per-Arne Amundsen, Kevin D. Lafferty, Rune Knudsen, Raul Primicerio, Roar Kristoffersen, Anders Klemetsen et al.:
    New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning
    Oecologia 2013 ARKIV / DOI
  • Karl Øystein Gjelland, Knut Andreas Eikland Bækkelie, Åge Brabrand, Roar Kristoffersen, Martin Svenning, Antti Eloranta et al.:
    Overvåking av fisk i store innsjøer – FIST 2018
    2020 FULLTEKST
  • Svetlana A. Murzina, Sergey G. Sokolov, Svetlana N. Pekkoeva, Evgeny P. Ieshko, Nina N. Nemova, Roar Kristoffersen et al.:
    Correction to: First data on the parasite fauna of daubed shanny Leptoclinus maculatus (Fries 1838) (Actinopterygii, Perciformes: Stichaeidae) in Svalbard waters
    Polar Biology 2019 DOI
  • Miroslava Soldánová, Ana Born-Torrijos, Tereza Vyhlídalová, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Concomitant predation on parasites and hosts affect trematode transmission success
    2017
  • Ana Born-Torrijos, Tereza Vyhlídalová, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen, Miroslava Soldánová :
    Parasites in the food web: concomitant predation on snail hosts and their trematodes by fish can modulate the risk of infection
    2017
  • Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Takvatnprosjektet (1980-2017): relasjoner til Fustavassdraget?
    2017
  • Roar Kristoffersen, Rune Knudsen, Per-Arne Amundsen :
    Bendelmark i ørret og røye
    Jakt og fiske 2017
  • Roar Kristoffersen, Per-Arne Amundsen, Rune Knudsen :
    Statusrapport Takvatn 2017
    2017
  • Per-Arne Amundsen, Aslak Smalås, Rune Knudsen, Roar Kristoffersen, Anna Siwertsson, Anders Klemetsen :
    Forskning og kultivering av en overbefolka røyebestand
    Septentrio Reports 2015
  • Roar Kristoffersen :
    Long-term dynamics of the ectoparasite Gyrodactylus salaris (Monogenea) in young Arctic charr (Salvelinus alpinus) in two riverine systems in northern Norway.
    2015
  • Eirik Haugstvedt Henriksen, Rune Knudsen, Roar Kristoffersen, Armand M Kuris, Kevin D. Lafferty, Anna Siwertsson et al.:
    Ontogenetic dynamics of Diphyllobothrium infections in sympatric Arctic charr and brown trout
    2015
  • Anna Siwertsson, Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Jesper Andreas Kuhn, Anders Klemetsen et al.:
    Towards a holistic view of a lake food web - the importance of including benthic habitats and parasites
    2015
  • Jesper Andreas Kuhn, Rune Knudsen, Roar Kristoffersen, Raul Primicerio, Per-Arne Amundsen :
    Temporal changes and structural variation in the intestinal parasite community of Arctic charr in a subarctic lake
    2015
  • Jesper Andreas Kuhn, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Temporal changes and structural variation in the intestinal parasite community of Arctic charr in a subarctic lake
    8th International Charr Symposium - Book of Abstract 2015
  • Anna Siwertsson, Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Anders Klemetsen, Jesper Andreas Kuhn et al.:
    Towards a holistic view of a lake food web - the importance of including benthic habitats and parasites
    2015
  • Anna Siwertsson, Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Anders Klemetsen, Jesper Andreas Kuhn et al.:
    Food web structure in a subarctic lake
    2015
  • Per-Arne Amundsen, Jesper Andreas Kuhn, Anna Siwertsson, Rune Knudsen, Roar Kristoffersen :
    Økologi og forvaltning av fiskevatn – Takvatnprosjektet og resultater fra undersøkelser i seks innsjøer i Hamarøy-området
    2015
  • Per-Arne Amundsen, Aslak Smalås, Rune Knudsen, Roar Kristoffersen, Anna Siwertsson, Anders Klemetsen :
    Takvatnprosjektet - Forskning og kultivering av en overbefolka røyeberstand
    UiT Norges arktiske universitet 2015 FULLTEKST / ARKIV
  • Jesper Andreas Kuhn, A. Frainer, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Effects of fish species composition on Diphyllobothrium spp. infections in subarctic brown trout and Arctic charr – is three-spined stickleback a key species?
    2015
  • Jesper Andreas Kuhn, A. Frainer, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Effects of fish species composition on Diphyllobothrium spp. infections in subarctic brown trout and Arctic charr – is three-spined stickleback a key species?
    6th Conference of the Scandinavian Baltic Society for Parasitology. Uppsala, Sweden 2015
  • Jesper Andreas Kuhn, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Effects of fish species composition on Diphyllobothrium spp. infections in subarctic brown trout and Arctic charr - is three-spined stickleback a key species?
    2014
  • Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Anders Klemetsen :
    Long-term population and community responses following ecological perturbation
    2014
  • Jesper Andreas Kuhn, Roar Kristoffersen, Rune Knudsen, J. Jakobsen, David J. Marcogliese, S. A. Locke et al.:
    Parasite communities of two three-spined stickleback (Gasterosteus aculeatus) populations in subarctic Norway - Effects of a local-scale host introduction
    2014
  • Jesper Andreas Kuhn, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Effects of fish species composition on Diphyllobothrium spp. infections in subarctic brown trout and Arctic charr ‐ is the three‐spined stickleback a key species?
    2014
  • Jesper Andreas Kuhn, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Effects of fish species composition on Diphyllobothrium spp. infections in subarctic brown trout and Arctic charr ‐ is the three‐spined stickleback a key species?
    DAFINET book of abstracts, Frederiksberg, Denmark 2014
  • Anna Siwertsson, Rune Knudsen, Roar Kristoffersen, Anders Klemetsen, Per-Arne Amundsen :
    The role of parasites in food-web topology and dynamics of subarctic lakes – background and current status
    2014
  • Rune Knudsen, Anna Siwertsson, Anders Klemetsen, Roar Kristoffersen, Per-Arne Amundsen :
    The role of parasites in food-web of subarctic lakes
    2014
  • Jesper Andreas Kuhn, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen :
    Effects of fish species composition on Diphyllobothrium spp. infections in subarctic brown trout and Arctic charr ‐ is three‐spined stickleback a key species?
    2014
  • Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Anders Klemetsen :
    Long-term studies following experimental density depletion of a stunted Arctic charr population - ecological and management implications
    2013
  • Roar Kristoffersen, Per-Arne Amundsen, Rune Knudsen :
    Statusrapport for fiskebestandene i Takvatn og tre andre innsjøer i Balsfjord og Målselv
    2012
  • Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Anders Klemetsen :
    Long-term effects of experimental density depletion of a stunted Arctic charr population - ecological and management implications
    2012
  • Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen :
    Statusrapport for fiskebestandene i Josefvatn og tre andre innsjøer i Balsfjord og Målselv
    2012
  • Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen :
    Statusrapport for fiskebestandene i Sagelvvatn og tre andre innsjøer i Balsfjord og Målselv
    2012
  • Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Karl Øystein Gjelland, Anders Klemetsen :
    Long-term studies in relation to fish harvesting and invasions in freshwater systems
    2012

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