Torkel Larsen

Engineer

Institute of Marine Research
Marine Ecosystem Acoustics Group
Flødevigen Research Station
Nye Flødevigveien 20
4817 His, NORWAY
Tel. +47 90 91 05 15
Email: torkel.larsen@hi.no

orcid.org/0000-0002-5498-9219

Education

M.Sc. (2010) in Biology, University of Oslo
B.Sc. (2008) in Biology, Norwegian University of Science and Technology

Areas of expertise and interest

I am a marine ecologist working mostly on wrasse. I’m interested in the population dynamics of wild stocks and have studied this using field investigations, mark-recapture studies and age reading (otoliths and scales).

Active projects

Population dynamics of wild wrasse populations along the Norwegian coast (led by Anne Berit Skiftesvik)

Publications

Static magnetic fields reduce swimming activity of Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) larvae

Cresci, A., C.M.F. Durif, T. Larsen, R. Bjelland, A.B. Skiftesvik & H.I. Browman. 2024. Static magnetic fields reduce swimming activity of Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) larvae. ICES Journal of Marine Science. doi: 10.1093/icesjms/fsad205.
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Read a story about the work (In Norwegian)

Atlantic cod (Gadus morhua) larvae are attracted by low-frequency noise simulating that of operating offshore wind farms

Cresci, A., G. Zhang, C.M.F. Durif, T. Larsen, S. Shema, A.B. Skiftesvik & H.I. Browman. 2023. Atlantic cod (Gadus morhua) larvae are attracted by low-frequency noise simulating that of operating offshore wind farms. Communications Biology. doi: 10.1038/s42003-023-04728-y.
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Read the press release
Read a story about the work in Hakai Magazine
Read a story about the work

Magnetic fields produced by subsea high voltage DC cables reduce swimming activity of haddock larvae (Melanogrammus aeglefinus)

Cresci, A., C.M.F. Durif, T. Larsen, R. Bjelland, A.B. Skiftesvik & H.I. Browman. 2022.Magnetic fields produced by subsea high voltage DC cables reduce swimming activity of haddock larvae (Melanogrammus aeglefinus). PNAS Nexus. doi: 10.1093/pnasnexus/pgac175.
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Read a story about the work
Read a story about the work (in Norwegian)

Magnetic fields generated by the DC cables of offshore wind farms have no effect on spatial preference or swimming behavior of lesser sandeel larvae (Ammodytes marinus)

Cresci, A., P. Perrichon, C.M.F. Durif, E. Sørhus, E. Johnsen, R. Bjelland, T. Larsen, A.B. Skiftesvik & H.I. Browman. 2022. Magnetic fields generated by the DC cables of offshore wind farms have no effect on spatial preference or swimming behavior of lesser sandeel larvae (Ammodytes marinus). Marine Environmental Research. doi: 10.1016/j.marenvres.2022.105609. Editor’s choice article.
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Read a story about the work

Goldsinny wrasse (Ctenolabrus rupestris) have a sex-dependent magnetic compass for maintaining site fidelity

Cresci, A., T. Larsen, K.T. Halvorsen, C.M.F. Durif, R.M. Bjelland, H.I. Browman & A.B. Skiftesvik. 2022. Goldsinny wrasse (Ctenolabrus rupestris) have a sex-dependent magnetic compass for maintaining site fidelity. Fisheries Oceanography 31: 164–171. doi: 10.1111/fog.12569.
Read the paper
Read stories about the work HERE and HERE (in Norwegian)

Movement patterns of temperate wrasses (Labridae) within a small marine protected area

Halvorsen, K.T., T. Larsen, H.I. Browman, C.M.F. Durif, N. Aasen, L.A. Vøllestad, A. Cresci, T.K. Sørdalen, R. Bjelland & A.B. Skiftesvik. 2021. Movement patterns of temperate wrasses (Labridae) within a small marine protected area. Journal of Fish Biology. 99: 1513-1518. doi: 10.1111/jfb.14825.
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Mind the depth: The vertical dimension of a small-scale fishery shapes selection on species, size and sex in wrasses

Halvorsen, K.T., T. Knutsen Sørdalen, T. Larsen, H.I. Browman, T. Rafoss, J. Albretson & A.B. Skiftesvik. 2020. Mind the depth: The vertical dimension of a small-scale fishery shapes selection on species, size and sex in wrasses. Marine and Coastal Fisheries 12: 404–422, doi: 10.1002/mcf2.10131.
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Kunnskapsinnhenting Leppefisk – biologi og fiskeri 2013-2018

Skiftesvik, A.B., K. Halvorsen & T. Larsen. 2019. Kunnskapsinnhenting Leppefisk – biologi og fiskeri 2013-2018. Rapport fra Havforskningen 2019-18. ISSN:1893-4536
Read the report (In Norwegian)

Potential for managing life history diversity in a commercially exploited intermediate predator, the goldsinny wrasse (Ctenolabrus rupestris)

Olsen, E., K. Halvorsen, T. Larsen & A. Kuparinen. 2019. Potential for managing life history diversity in a commercially exploited intermediate predator, the goldsinny wrasse (Ctenolabrus rupestris). ICES Journal of Marine Science. doi:10.1093/icesjms/fsy183
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Impact of harvesting cleaner fish for salmonid aquaculture assessed from replicated coastal marine protected areas.

Halvorsen, K.T., T. Larsen, T. K.Sørdalen, L.A. Vøllestad, H. Knutsen & E.M. Olsen. 2017. Impact of harvesting cleaner fish for salmonid aquaculture assessed from replicated coastal marine protected areas. Marine Biology Research 13: 359-369.
Read the paper