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  3. Roar Kristoffersen
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Roar.jpg
Institutt for arktisk og marin biologi roar.kristoffersen@uit.no +4777645111 95208950 Tromsø

Kristoffersen, Roar

Førsteamanuensis. Ferskvannsøkologi/parasittologi

Stillingsbeskrivelse

Undervisning:

  • Bachelor- og mastergradskurs i ferskvannsøkologi (Bio-1501, Bio-2501, Bio-2503, Bio-3518, Bio-3521)
  • Bachelor- og mastergradskurs i parasittologi (Bio-2508, Bio-3519)
  • Veiledning av master- og doktorgradsstudenter
  • 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
  • Miroslava Soldánová, Petra Kundid, Tomas Scholz, Roar Kristoffersen, Rune Knudsen :
    Somatic Dimorphism in Cercariae of a Bird Schistosome
    Pathogens 2022 ARKIV / DOI
  • Ana Born-Torrijos, Rachel Paterson, Gabrielle van Beest, Tereza Vyhlídalová, Eirik Haugstvedt Henriksen, Rune Knudsen m.fl.:
    Cercarial behaviour alters the consumer functional response of three-spined sticklebacks
    Journal of Animal Ecology 2021 ARKIV / DOI
  • Ana Born-Torrijos, Gabrielle S. Van Beest, Tereza Vyhlídalová, Rune Knudsen, Roar Kristoffersen, Per-Arne Amundsen m.fl.:
    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, Jessica Schwelm, Tereza Vyhlídalová, Eirik Haugstvedt Henriksen m.fl.:
    Temperature does not influence functional response of amphipods consuming different trematode prey
    Parasitology Research 2020 ARKIV / DOI
  • Eirik Haugstvedt Henriksen, André Frainer, Rune Knudsen, Roar Kristoffersen, Armand M. Kuris, Kevin D. Lafferty m.fl.:
    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
  • Svetlana Murzina, Sergey G. Sokolov, Svetlana N. Pekkoeva, Evgeny P. Ieshko, Nina N. Nemova, Roar Kristoffersen m.fl.:
    First data on the parasite fauna of daubed shanny Leptoclinus maculatus (Fries 1838) (Actinopterygii, Perciformes: Stichaeidae) in Svalbard waters
    Polar Biology 2019 DOI
  • Per-Arne Amundsen, Raul Primicerio, Aslak Smalås, Eirik Haugstvedt Henriksen, Rune Knudsen, Roar Kristoffersen m.fl.:
    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 m.fl.:
    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, 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
  • 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
  • Eirik Haugstvedt Henriksen, Rune Knudsen, Roar Kristoffersen, Armand M. Kuris, Kevin D. Lafferty, Anna Siwertsson m.fl.:
    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 m.fl.:
    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 m.fl.:
    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 m.fl.:
    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
  • Stefan Kusterle, Roar Kristoffersen, Audun H. Rikardsen :
    Population dynamics of Salmincola salmoneus on Atlantic salmon in a northern Norwegian river
    Diseases of Aquatic Organisms 2012 DOI
  • Anja Celine Winger, Roar Kristoffersen, Rune Knudsen :
    Rapid transmission of Gyrodactylus salaris (Malmberg, 1957) between live Arctic charr, Salvelinus alpinus (L.), fry
    Journal of Fish Diseases 2012 DOI
  • Karl Øystein Gjelland, Knut Andreas Eikland Bækkelie, Åge Brabrand, Roar Kristoffersen, Martin Svenning, Antti Eloranta m.fl.:
    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 m.fl.:
    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
  • Roar Kristoffersen, Per-Arne Amundsen, Rune Knudsen :
    Statusrapport Takvatn 2017
    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
  • 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
  • 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
    2015 FULLTEKST / ARKIV
  • Anna Siwertsson, Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Anders Klemetsen, Jesper Andreas Kuhn m.fl.:
    Food web structure in a subarctic lake
    2015
  • Anna Siwertsson, Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Anders Klemetsen, Jesper Andreas Kuhn m.fl.:
    Towards a holistic view of a lake food web - the importance of including benthic habitats and parasites
    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
  • Anna Siwertsson, Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Jesper Andreas Kuhn, Anders Klemetsen m.fl.:
    Towards a holistic view of a lake food web - the importance of including benthic habitats and parasites
    2015
  • Eirik Haugstvedt Henriksen, Rune Knudsen, Roar Kristoffersen, Armand M Kuris, Kevin D. Lafferty, Anna Siwertsson m.fl.:
    Ontogenetic dynamics of Diphyllobothrium infections in sympatric Arctic charr and brown trout
    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
  • 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, 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, 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
  • Per-Arne Amundsen, Aslak Smalås, Rune Knudsen, Roar Kristoffersen, Anna Siwertsson, Anders Klemetsen :
    Forskning og kultivering av en overbefolka røyebestand
    Septentrio Reports 2015
  • 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
  • Per-Arne Amundsen, Rune Knudsen, Roar Kristoffersen, Anders Klemetsen :
    Long-term population and community responses following ecological perturbation
    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
  • 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, Roar Kristoffersen, Rune Knudsen, J. Jakobsen, David J. Marcogliese, S. A. Locke m.fl.:
    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?
    DAFINET book of abstracts, Frederiksberg, Denmark 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

    • De 50 siste resultatene fra Cristin vises på siden. Se alle arbeider i Cristin her →

    Publikasjoner utenom Cristin

    Noen nyere publikasjoner:

    • Winger, A.C., Kristoffersen, R., Siikavuopio, S.I. & Knudsen, R. 2009. Experiments to test if allopatric Salvelinus alpinus (L.) are suitable year-round hosts of Gyrodactylus salaris (Monogenea). Journal of Fish Biology 74: 1 - 11.
    • Winger, A.C., Kanck, M., Kristoffersen, R. & Knudsen, R. 2008. Seasonal dynamics and persistence of Gyrodactylus salaris in two riverine anadromous Arctic charr populations. Environmental Biology of Fishes 83: 117 - 123
    • Winger, A.C., Primicerio, R., Kristoffersen, R., Siikavuopio, S.I. & Knudsen, R. 2008. Gyrodactylus salaris infecting allopatric Arctic charr fry: an experimental study of host survival. Journal of Fish Biology 73: 1 - 12.
    • Bjørn, P.-A., Finstad, B., Kristoffersen, R., Rikardsen, A. & McKinley, R.S. 2007. Differences in risks and consequences of salmon lice, Lepeophtheirus salmonis (Krøyer), infection on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords. ICES Journal of Marine Science 64: 386 - 393.
    • Knudsen, R., Adolfsen, P., Sandring, S., Kristoffersen, R., Siikavuopio, S. & Rikardsen, A. 2007. The suitability of anadromous Arctic charr as host and vector of the monogenean Gyrodactylus salaris. Ecology of Freshwater Fishes 16: 99 - 104.
    • Knudsen, R., Curtis, M.A. & Kristoffersen, R. 2004. Aggregation of helminths: the role of feeding behaviour of fish hosts. Journal of Parasitology 90: 1-7.
    • Amundsen, P.-A., Knudsen, R., Kuris, A.M. & Kristoffersen, R. 2003. Seasonal and ontogenetic dynamics in trophic transmission of parasites. Oikos 102: 285 - 293.

    Populærvitenskapelige artikler:

    • Amundsen, P.-A. & Kristoffersen, R. red. 2008. Ferskvannsfisk. Ottar 5-2008. 80 s. Tromsø Museum
    • Kristoffersen, R., Amundsen, P.-A. & Knudsen, R. 2008. Ferskvann og ferskvannsfisk i Nord-Norge. Ottar 5-08: 6 - 13.
    • Kristoffersen, R., Knudsen, R. & Amundsen, P.-A. 2008. Fiskeparasitter. Ottar 5-08: 61 - 68.
    • Kristoffersen, R., Winger, A.C., Knudsen, R. & Rikardsen, A. 2008. Gyrodactylus salaris - laksedreper og røyeplager. Ottar 5-08: 69 - 72.
    • Amundsen, P.-A. & Kristoffersen, R. 2008. Anders Klemetsen - en pioner i nordnorsk ferskvannsforskning. Ottar 5-08: 3 - 5.
    • Knudsen, R., Amundsen, P.-A., Kristoffersen, R., Primicerio, R., Dalsbø, L. & Evjen, J. 2008. Takvatnprosjektet - vellykket kultiverings- og forskningssamarbeid. Ottar 5-08: 14 - 21.
    • Kristoffersen, R., Rikardsen, A., Winger, A.C., Adolfsen, P. & Knudsen, R. 2005. Røye som langtidsvert og smittereservoar for Gyrodactylus salaris i Skibotnelva i Troms. NINA-rapport 36. Norsk institutt for naturforskning, Trondheim. ISBN 82-426-1559-4. 27 s.

    Forskningsinteresser

    • Økologiske interaksjoner mellom parasitter og ferskvannsfisk
    • Epidemiologi til marine parasitter hos oppdrettsfisk
    • Kultivering og forvaltning av ferskvannsfisk