Helene Børretzen Fjørtoft
About
My work
I am writing a PhD on salmon lice. Chemotherapeutants were long the main tool to combat salmon lice in aquaculture, but after a while the lice became resistant. The genetic markers for two of the compounds, organophosphates and pyrethroids, are known, which enables us to find resistant lice by using a genetic test. I use the genetic markers to investigate how reistance disperse in time and space in the North Atlantic salmon louse population, where also wild Atlantic salmon and sea trout play a role.
I also contribute on other research projects at the institute that involves salmon lice, wild salmonids or aquaculture. I supervise bachelor students.
Competence
- Salmon lice
- Interactions between farmed and wild salmonids
- Wild Atlantic salmon and sea trout
Background
Education:
- Bachelor in Ecology and natural resource management, Norwegian University of Life Sciences
- Master in Naturasl resource management, Norwegian University of Life Sciences
Work experience:
- Manager of Geiranger-Herdalen protected landscape
Publications
2022
- Stene, Anne; Hellevik, Christina Carrozzo; Fjørtoft, Helene Børretzen; Philis, Gaspard. (2022) Considering elements of natural strategies to control salmon lice infestation in marine cage culture. Aquaculture Environment Interactions. volum 14.
2021
- Fjørtoft, Helene Børretzen; Nilsen, Frank; Besnier, Francois; Stene, Anne; Tveten, Ann-Kristin; Bjørn, Pål Arne; Aspehaug, Vidar Teis; Glover, Kevin Alan. (2021) Losing the 'arms race': Multiresistant salmon lice are dispersed throughout the North Atlantic Ocean. Royal Society Open Science. volum 8 (5).
- Walraven, Nathalie; Fjørtoft, Helene Børretzen; Stene, Anne. (2021) Less is more: Negative relationship between biomass density and sea lice infestation in marine salmon farming. Aquaculture. volum 539.
2020
- Fjørtoft, Helene Børretzen; Nilsen, Frank; Besnier, Francois; Espedal, Per Gunnar; Stene, Anne; Tveten, Ann-Kristin; Bjørn, Pål Arne; Aspehaug, Vidar; Glover, Kevin. (2020) Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017. ICES Journal of Marine Science. volum 77 (5).
2019
- Fjørtoft, Helene Børretzen; Nilsen, Frank; Besnier, Francois; Stene, Anne; Bjørn, Pål Arne; Tveten, Ann-Kristin; Aspehaug, Vidar Teis; Finstad, Bengt; Glover, Kevin. (2019) Salmon Lice Sampled from Wild Atlantic Salmon and Sea Trout Throughout Norway Display High Frequencies of the Genotype Associated with Pyrethroid Resistance. Aquaculture Environment Interactions. volum 11.
2018
- Fjørtoft, Helene Børretzen; Tveten, Ann-Kristin; Stene, Anne. (2018) Screening for viruses in salmonids from a rotenone-treated Norwegian river. Blue Growth: Aquaculture, Fisheries, Market and Health Perspectives..
2017
- Fjørtoft, Helene Børretzen; Besnier, Francois; Stene, Anne; Nilsen, Frank; Bjørn, Pål Arne; Tveten, Ann-Kristin; Finstad, Bengt; Aspehaug, Vidar; Glover, Kevin. (2017) The Phe362Tyr mutation conveying resistance to organophosphates occurs in high frequencies in salmon lice collected from wild salmon and trout. Scientific Reports. volum 7:14258.
- Kaur, Kiranpreet; Besnier, Francois; Glover, Kevin; Nilsen, Frank; Aspehaug, Vidar Teis; Fjørtoft, Helene Børretzen; Horsberg, Tor Einar. (2017) The mechanism (Phe362Tyr mutation) behind resistance in Lepeophtheirus salmonis pre-dates organophosphate use in salmon farming. Scientific Reports. volum 7 (1).
2015
- Tveten, Ann-Kristin; Fjørtoft, Helene Børretzen; Olsen, Magne Hauge; Venås, Leonardo Areas; Isaksson, Aimee Kathrina Soto. (2015) Fargemetoder for prøvepreparering ved histologiske undersøkelser og fluoresense in situ hybridisering for studier av amøbegjellesykdom (AGD) i gjellevev og lakselus. Blue Bio-resources.
2014
- Fjørtoft, Helene Børretzen; Borgstrøm, Reidar; Skaala, Øystein. (2014) Differential changes in growth patterns of anadromous brown trout and Atlantic salmon from the River Etneelva over a 25-year period. Marine Biology Research. volum 10 (3).
Journal publications
- Stene, Anne; Hellevik, Christina Carrozzo; Fjørtoft, Helene Børretzen; Philis, Gaspard. (2022) Considering elements of natural strategies to control salmon lice infestation in marine cage culture. Aquaculture Environment Interactions. volum 14.
- Fjørtoft, Helene Børretzen; Nilsen, Frank; Besnier, Francois; Stene, Anne; Tveten, Ann-Kristin; Bjørn, Pål Arne; Aspehaug, Vidar Teis; Glover, Kevin Alan. (2021) Losing the 'arms race': Multiresistant salmon lice are dispersed throughout the North Atlantic Ocean. Royal Society Open Science. volum 8 (5).
- Walraven, Nathalie; Fjørtoft, Helene Børretzen; Stene, Anne. (2021) Less is more: Negative relationship between biomass density and sea lice infestation in marine salmon farming. Aquaculture. volum 539.
- Fjørtoft, Helene Børretzen; Nilsen, Frank; Besnier, Francois; Espedal, Per Gunnar; Stene, Anne; Tveten, Ann-Kristin; Bjørn, Pål Arne; Aspehaug, Vidar; Glover, Kevin. (2020) Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017. ICES Journal of Marine Science. volum 77 (5).
- Fjørtoft, Helene Børretzen; Nilsen, Frank; Besnier, Francois; Stene, Anne; Bjørn, Pål Arne; Tveten, Ann-Kristin; Aspehaug, Vidar Teis; Finstad, Bengt; Glover, Kevin. (2019) Salmon Lice Sampled from Wild Atlantic Salmon and Sea Trout Throughout Norway Display High Frequencies of the Genotype Associated with Pyrethroid Resistance. Aquaculture Environment Interactions. volum 11.
- Fjørtoft, Helene Børretzen; Besnier, Francois; Stene, Anne; Nilsen, Frank; Bjørn, Pål Arne; Tveten, Ann-Kristin; Finstad, Bengt; Aspehaug, Vidar; Glover, Kevin. (2017) The Phe362Tyr mutation conveying resistance to organophosphates occurs in high frequencies in salmon lice collected from wild salmon and trout. Scientific Reports. volum 7:14258.
- Kaur, Kiranpreet; Besnier, Francois; Glover, Kevin; Nilsen, Frank; Aspehaug, Vidar Teis; Fjørtoft, Helene Børretzen; Horsberg, Tor Einar. (2017) The mechanism (Phe362Tyr mutation) behind resistance in Lepeophtheirus salmonis pre-dates organophosphate use in salmon farming. Scientific Reports. volum 7 (1).
- Fjørtoft, Helene Børretzen; Borgstrøm, Reidar; Skaala, Øystein. (2014) Differential changes in growth patterns of anadromous brown trout and Atlantic salmon from the River Etneelva over a 25-year period. Marine Biology Research. volum 10 (3).
Part of book/report
- Fjørtoft, Helene Børretzen; Tveten, Ann-Kristin; Stene, Anne. (2018) Screening for viruses in salmonids from a rotenone-treated Norwegian river. Blue Growth: Aquaculture, Fisheries, Market and Health Perspectives..
- Tveten, Ann-Kristin; Fjørtoft, Helene Børretzen; Olsen, Magne Hauge; Venås, Leonardo Areas; Isaksson, Aimee Kathrina Soto. (2015) Fargemetoder for prøvepreparering ved histologiske undersøkelser og fluoresense in situ hybridisering for studier av amøbegjellesykdom (AGD) i gjellevev og lakselus. Blue Bio-resources.
Media
2017
- Fjørtoft, Helene Børretzen. (2017) Evig kamp mot liten kreps. Nett.no [Internett]. 2017-03-19.
- Fjørtoft, Helene Børretzen; Stige, Per Ove. (2017) -Lusa kjem frå oppdrett. Sunnmørsposten [Avis]. 2017-11-07.
- Sætre, Gunhild; Gansel, Lars Christian; Fjørtoft, Helene Børretzen; Aas, Grete Hansen; Tuene, Stig Atle. (2017) Blåskjell kan bli våpen mot lakselus. https://www.nrk.no [Internett]. 2017-11-08.
- Sætre, Gunhild; Gansel, Lars Christian; Fjørtoft, Helene Børretzen; Aas, Grete Hansen; Tuene, Stig Atle. (2017) Blåskjell kan bli våpen mot lakselus. www.tv.nrk.no [TV]. 2017-11-08.