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Roar Kristoffersen
Roar Kristoffersen
Associate professor University of Tromsø
Verified email at uit.no
Title
Cited by
Cited by
Year
Parallel evolution of ecomorphological traits in the European whitefish Coregonus lavaretus (L.) species complex during postglacial times
K Østbye, PA Amundsen, L Bernatchez, A Klemetsen, R Knudsen, ...
Molecular Ecology 15 (13), 3983-4001, 2006
2962006
Salmon lice infection of wild sea trout and Arctic char in marine and freshwaters: the effects of salmon farms
PA Bjørn, B Finstad, R Kristoffersen
Aquaculture Research 32 (12), 947-962, 2001
2782001
Aggregation of helminths: the role of feeding behavior of fish hosts
R Knudsen, MA Curtis, R Kristoffersen
Journal of Parasitology 90 (1), 1-7, 2004
1102004
Resource competition and interactive segregation between sympatric whitefish morphs
PA Amundsen, R Knudsen, A Klemetsen, R Kristoffersen
Annales Zoologici Fennici, 301-307, 2004
942004
Takvatn through 20 years: long-term effects of an experimental mass removal of Arctic charr, Salvelinus alpinus, from a subarctic lake
A Klemetsen, PA Amundsen, PE Grotnes, R Knudsen, R Kristoffersen, ...
Ecology, behaviour and conservation of the charrs, genus Salvelinus, 39-47, 2002
912002
Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway
R Knudsen, R Kristoffersen, PA Amundsen
Canadian Journal of Zoology 75 (12), 2003-2009, 1997
851997
New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning
PA Amundsen, KD Lafferty, R Knudsen, R Primicerio, R Kristoffersen, ...
Oecologia 171, 993-1002, 2013
842013
Area protection may reduce salmon louse infection risk to wild salmonids
PA Bjørn, R Sivertsgård, B Finstad, R Nilsen, RM Serra-Llinares, ...
Aquaculture Environment Interactions 1 (3), 233-244, 2011
772011
Seasonal and ontogenetic dynamics in trophic transmission of parasites
PA Amundsen, R Knudsen, AM Kuris, R Kristoffersen
Oikos 102 (2), 285-293, 2003
592003
Infection of whitefish (Coregonus lavaretus L. sl) by Triaenophorus crassus Forel (Cestoda: Pseudophyllidea): a case study in parasite control
PA Amundsen, R Kristoffersen
Canadian Journal of Zoology 68 (6), 1187-1192, 1990
491990
Food borne parasites as indicators of trophic segregation between Arctic charr and brown trout
R Knudsen, PA Amundsen, R Nilsen, R Kristoffersen, A Klemetsen
Environmental Biology of Fishes 83, 107-116, 2008
482008
Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and …
PA Bjørn, B Finstad, R Kristoffersen, RS McKinley, AH Rikardsen
ICES Journal of Marine Science 64 (2), 386-393, 2007
482007
Parasite communities of two three-spined stickleback populations in subarctic Norway—effects of a small spatial-scale host introduction
JA Kuhn, R Kristoffersen, R Knudsen, J Jakobsen, DJ Marcogliese, ...
Parasitology Research 114, 1327-1339, 2015
452015
Retur: en nordisk undersøgelse af recidiv blant klienter i kriminalforsorgen
HM Graunbøl, B Kielstrup, ML Muiluvuori, S Tyni, ES Baldursson, ...
Kriminalomsorgens utdanningssenter, 2010
452010
Seasonal dynamics and persistence of Gyrodactylus salaris in two riverine anadromous Arctic charr populations
AC Winger, M Kanck, R Kristoffersen, R Knudsen
Environmental Biology of Fishes 83, 117-123, 2008
432008
Infection of Salmincola edwardsii (Copepoda: Lernaeopodidae) in an age‐structured population of Arctic charr—a long‐term study
PA Amundsen, R Kristoffersen, R Knudsen, A Klemetsen
Journal of Fish Biology 51 (5), 1033-1046, 1997
391997
Occurrence of the digenean Cryptocotyle lingua in farmed Arctic charr Salvelinus alpinus and periwinkles Littorina littorea sampled close to charr farms in northern Norway
R Kristoffersen
Diseases of Aquatic Organisms 12 (1), 59-65, 1991
381991
The contribution of imprisonment and release to fatal overdose among a cohort of Norwegian drug abusers
E Ødegård, EJ Amundsen, KB Kielland, R Kristoffersen
Addiction Research & Theory 18 (1), 51-58, 2010
372010
Long‐term ecological studies in northern lakes—challenges, experiences, and accomplishments
PA Amundsen, R Primicerio, A Smalås, EH Henriksen, R Knudsen, ...
Limnology and Oceanography 64 (S1), S11-S21, 2019
362019
Ontogenetic dynamics of infection with Diphyllobothrium spp. cestodes in sympatric Arctic charr Salvelinus alpinus (L.) and brown trout Salmo trutta L.
EH Henriksen, R Knudsen, R Kristoffersen, AM Kuris, KD Lafferty, ...
Hydrobiologia 783, 37-46, 2016
322016
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