Roar Kristoffersen
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,
Petra Kundid,
Tomas Scholz,
Roar Kristoffersen,
Rune Knudsen
:
Somatic Dimorphism in Cercariae of a Bird Schistosome
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
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
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
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
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
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
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
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?
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.
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Per-Arne Amundsen,
Aslak Smalås,
Rune Knudsen,
Roar Kristoffersen,
Anna Siwertsson,
Anders Klemetsen
:
Forskning og kultivering av en overbefolka røyebestand
Septentrio Reports 2015
Per-Arne Amundsen,
Aslak Smalås,
Rune Knudsen,
Roar Kristoffersen,
Anna Siwertsson,
Anders Klemetsen
:
Takvatnprosjektet - Forskning og kultivering av en overbefolka røyeberstand
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 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
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 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
Rune Knudsen,
Anna Siwertsson,
Anders Klemetsen,
Roar Kristoffersen,
Per-Arne Amundsen
:
The role of parasites in food-web of subarctic lakes
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
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