Roar Kristoffersen

1.3k total citations
38 papers, 1.1k citations indexed

About

Roar Kristoffersen is a scholar working on Ecology, Parasitology and Nature and Landscape Conservation. According to data from OpenAlex, Roar Kristoffersen has authored 38 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 35 papers in Ecology, 14 papers in Parasitology and 13 papers in Nature and Landscape Conservation. Recurrent topics in Roar Kristoffersen's work include Parasite Biology and Host Interactions (30 papers), Fish Ecology and Management Studies (13 papers) and Helminth infection and control (11 papers). Roar Kristoffersen is often cited by papers focused on Parasite Biology and Host Interactions (30 papers), Fish Ecology and Management Studies (13 papers) and Helminth infection and control (11 papers). Roar Kristoffersen collaborates with scholars based in Norway, Czechia and United States. Roar Kristoffersen's co-authors include Rune Knudsen, Per‐Arne Amundsen, Anders Klemetsen, Bengt Finstad, P. A. Bjørn, Kjartan Østbye, Louis Bernatchez, TF Næsje, Kjetil Hindar and Mark A. Curtis and has published in prestigious journals such as Limnology and Oceanography, Oecologia and Journal of Animal Ecology.

In The Last Decade

Roar Kristoffersen

38 papers receiving 1.0k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Roar Kristoffersen Norway 18 859 542 254 225 211 38 1.1k
Markéta Ondračková Czechia 24 1.4k 1.7× 609 1.1× 209 0.8× 511 2.3× 257 1.2× 104 1.7k
Mingbo Yin China 17 513 0.6× 277 0.5× 214 0.8× 132 0.6× 160 0.8× 53 887
María Teresa González Chile 20 841 1.0× 185 0.3× 102 0.4× 184 0.8× 250 1.2× 84 1.2k
Shigehiko Urawa Japan 23 712 0.8× 675 1.2× 364 1.4× 209 0.9× 133 0.6× 109 1.4k
Pål Arne Bjørn Norway 18 847 1.0× 649 1.2× 111 0.4× 322 1.4× 301 1.4× 45 1.3k
Leslie A. Chisholm Australia 21 1.2k 1.4× 483 0.9× 76 0.3× 174 0.8× 257 1.2× 90 1.4k
Karin Boxaspen Norway 13 809 0.9× 359 0.7× 93 0.4× 195 0.9× 308 1.5× 25 1.1k
Ju‐Shey Ho United States 19 1.5k 1.7× 208 0.4× 224 0.9× 352 1.6× 286 1.4× 197 1.7k
Massimo Lorenzoni Italy 23 782 0.9× 788 1.5× 236 0.9× 698 3.1× 143 0.7× 123 1.5k
V. N. Mikheev Russia 19 714 0.8× 410 0.8× 82 0.3× 241 1.1× 118 0.6× 72 995

Countries citing papers authored by Roar Kristoffersen

Since Specialization
Citations

This map shows the geographic impact of Roar Kristoffersen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Roar Kristoffersen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Roar Kristoffersen more than expected).

Fields of papers citing papers by Roar Kristoffersen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Roar Kristoffersen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Roar Kristoffersen. The network helps show where Roar Kristoffersen may publish in the future.

Co-authorship network of co-authors of Roar Kristoffersen

This figure shows the co-authorship network connecting the top 25 collaborators of Roar Kristoffersen. A scholar is included among the top collaborators of Roar Kristoffersen based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Roar Kristoffersen. Roar Kristoffersen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Born‐Torrijos, Ana, Rachel A. Paterson, Rune Knudsen, et al.. (2020). Temperature does not influence functional response of amphipods consuming different trematode prey. Parasitology Research. 119(12). 4271–4276. 10 indexed citations
2.
Frainer, André, Rune Knudsen, Roar Kristoffersen, et al.. (2019). Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission. Journal of Applied Ecology. 56(6). 1482–1491. 10 indexed citations
3.
Amundsen, Per‐Arne, et al.. (2018). Long‐term ecological studies in northern lakes—challenges, experiences, and accomplishments. Limnology and Oceanography. 64(S1). 25 indexed citations
4.
Kristoffersen, Roar, Rune Knudsen, David J. Marcogliese, et al.. (2015). Parasite communities of two three-spined stickleback populations in subarctic Norway—effects of a small spatial-scale host introduction. Parasitology Research. 114(4). 1327–1339. 34 indexed citations
5.
Kristoffersen, Roar, Karl Øystein Gjelland, Rune Knudsen, et al.. (2014). Transmission dynamics of the monogeneanGyrodactylus salarisunder seminatural conditions. Journal of Fish Diseases. 38(6). 541–550. 3 indexed citations
6.
Amundsen, Per‐Arne, Kevin D. Lafferty, Rune Knudsen, et al.. (2012). New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning. Oecologia. 171(4). 993–1002. 55 indexed citations
7.
Kristoffersen, Roar, et al.. (2012). Population dynamics of Salmincola salmoneus on Atlantic salmon in a northern Norwegian river. Diseases of Aquatic Organisms. 100(1). 59–70. 7 indexed citations
8.
Kristoffersen, Roar, et al.. (2012). Rapid transmission of Gyrodactylus salaris (Malmberg, 1957) between live Arctic charr, Salvelinus alpinus (L.), fry. Journal of Fish Diseases. 35(10). 781–784. 2 indexed citations
9.
Kristoffersen, Roar, et al.. (2009). Experiments to test if allopatric Salvelinus alpinus are suitable year‐round hosts of Gyrodactylus salaris (Monogenea). Journal of Fish Biology. 74(7). 1476–1486. 5 indexed citations
10.
Primicerio, Raul, et al.. (2008). Gyrodactylus salarisinfecting allopatric Arctic charrSalvelinus alpinusfry: an experimental study of host survival. Journal of Fish Biology. 73(9). 2198–2209. 7 indexed citations
11.
Knudsen, Rune, Per‐Arne Amundsen, Rune Nilsen, Roar Kristoffersen, & Anders Klemetsen. (2007). Food borne parasites as indicators of trophic segregation between Arctic charr and brown trout. Environmental Biology of Fishes. 83(1). 107–116. 35 indexed citations
12.
Østbye, Kjartan, Per‐Arne Amundsen, Louis Bernatchez, et al.. (2006). Parallel evolution of ecomorphological traits in the European whitefishCoregonus lavaretus(L.) species complex during postglacial times. Molecular Ecology. 15(13). 3983–4001. 206 indexed citations
13.
Amundsen, Per‐Arne, Rune Knudsen, Anders Klemetsen, & Roar Kristoffersen. (2004). Resource competition and interactive segregation between sympatric whitefish morphs. Annales Zoologici Fennici. 41(1). 301–307. 58 indexed citations
14.
Knudsen, Rune, Mark A. Curtis, & Roar Kristoffersen. (2004). AGGREGATION OF HELMINTHS: THE ROLE OF FEEDING BEHAVIOR OF FISH HOSTS. Journal of Parasitology. 90(1). 1–7. 68 indexed citations
15.
Klemetsen, Anders, et al.. (2002). Takvatn Through 20 Years: Long-term Effects of an Experimental Mass Removal of Arctic Charr, Salvelinus Alpinus, From a Subarctic Lake. Environmental Biology of Fishes. 64(1-3). 39–47. 59 indexed citations
16.
Bjørn, P. A., Bengt Finstad, & Roar Kristoffersen. (2001). Salmon lice infection of wild sea trout and Arctic char in marine and freshwaters: the effects of salmon farms. Aquaculture Research. 32(12). 947–962. 138 indexed citations
17.
Knudsen, Rune, Roar Kristoffersen, & Per‐Arne Amundsen. (1997). Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway. Canadian Journal of Zoology. 75(12). 2003–2009. 50 indexed citations
18.
Amundsen, Per‐Arne & Roar Kristoffersen. (1990). Infection of whitefish (Coregonus lavaretus L. s.l.) by Triaenophorus crassus Forel (Cestoda: Pseudophyllidea): a case study in parasite control. Canadian Journal of Zoology. 68(6). 1187–1192. 30 indexed citations
19.
20.
Kristoffersen, Roar. (1988). A new species of parasite on Arctic charr, Salvelinus alpinus (L.), in seawater cages in Scandinavia. Aquaculture. 71(3). 187–191. 4 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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