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
2023
-
Rutle, Karoline Hasti;
Skern-Mauritzen, Rasmus;
Nilsen, Frank;
Mateos-Rivera, Alejandro;
Sørvik, Anne Grete Eide;
Jansson, Eeva.
(2023)
Aquaculture-driven evolution of the salmon louse mtDNA genome.
Evolutionary Applications
Academic article
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
Academic article
2021
-
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
Academic article
-
Fjørtoft, Helene Børretzen;
Nilsen, Frank;
Besnier, Francois;
Stene, Anne;
Tveten, Ann-Kristin;
Bjørn, Pål Arne.
(2021)
Losing the 'arms race': Multiresistant salmon lice are dispersed throughout the North Atlantic Ocean.
Royal Society Open Science
Academic article
2020
-
Fjørtoft, Helene Børretzen;
Nilsen, Frank;
Besnier, Francois;
Espedal, Per Gunnar;
Stene, Anne;
Tveten, Ann-Kristin.
(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
Academic literature review
2019
-
Fjørtoft, Helene Børretzen;
Nilsen, Frank;
Besnier, Francois;
Stene, Anne;
Bjørn, Pål Arne;
Tveten, Ann-Kristin.
(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
Academic article
2018
-
Fjørtoft, Helene Børretzen;
Tveten, Ann-Kristin;
Stene, Anne.
(2018)
Screening for viruses in salmonids from a rotenone-treated Norwegian river.
Academic chapter/article/Conference paper
2017
-
Kaur, Kiranpreet;
Besnier, Francois;
Glover, Kevin;
Nilsen, Frank;
Aspehaug, Vidar Teis;
Fjørtoft, Helene Børretzen.
(2017)
The mechanism (Phe362Tyr mutation) behind resistance in Lepeophtheirus salmonis pre-dates organophosphate use in salmon farming.
Scientific Reports
Academic article
-
Fjørtoft, Helene Børretzen;
Besnier, Francois;
Stene, Anne;
Nilsen, Frank;
Bjørn, Pål Arne;
Tveten, Ann-Kristin.
(2017)
The Phe362Tyr mutation conveying
resistance to organophosphates
occurs in high frequencies in salmon
lice collected from wild salmon and
trout.
Scientific Reports
Academic article
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.
Academic chapter/article/Conference paper
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
Academic article
Journal publications
-
Rutle, Karoline Hasti;
Skern-Mauritzen, Rasmus;
Nilsen, Frank;
Mateos-Rivera, Alejandro;
Sørvik, Anne Grete Eide;
Jansson, Eeva.
(2023)
Aquaculture-driven evolution of the salmon louse mtDNA genome.
Evolutionary Applications
Academic article
-
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
Academic article
-
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
Academic article
-
Fjørtoft, Helene Børretzen;
Nilsen, Frank;
Besnier, Francois;
Stene, Anne;
Tveten, Ann-Kristin;
Bjørn, Pål Arne.
(2021)
Losing the 'arms race': Multiresistant salmon lice are dispersed throughout the North Atlantic Ocean.
Royal Society Open Science
Academic article
-
Fjørtoft, Helene Børretzen;
Nilsen, Frank;
Besnier, Francois;
Espedal, Per Gunnar;
Stene, Anne;
Tveten, Ann-Kristin.
(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
Academic literature review
-
Fjørtoft, Helene Børretzen;
Nilsen, Frank;
Besnier, Francois;
Stene, Anne;
Bjørn, Pål Arne;
Tveten, Ann-Kristin.
(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
Academic article
-
Kaur, Kiranpreet;
Besnier, Francois;
Glover, Kevin;
Nilsen, Frank;
Aspehaug, Vidar Teis;
Fjørtoft, Helene Børretzen.
(2017)
The mechanism (Phe362Tyr mutation) behind resistance in Lepeophtheirus salmonis pre-dates organophosphate use in salmon farming.
Scientific Reports
Academic article
-
Fjørtoft, Helene Børretzen;
Besnier, Francois;
Stene, Anne;
Nilsen, Frank;
Bjørn, Pål Arne;
Tveten, Ann-Kristin.
(2017)
The Phe362Tyr mutation conveying
resistance to organophosphates
occurs in high frequencies in salmon
lice collected from wild salmon and
trout.
Scientific Reports
Academic article
-
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
Academic article
Part of book/report
-
Fjørtoft, Helene Børretzen;
Tveten, Ann-Kristin;
Stene, Anne.
(2018)
Screening for viruses in salmonids from a rotenone-treated Norwegian river.
Academic chapter/article/Conference paper
-
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.
Academic chapter/article/Conference paper
Outreach
2017
-
InterviewFjørtoft, Helene Børretzen; Stige, Per Ove. (2017) -Lusa kjem frå oppdrett. Sunnmørsposten Sunnmørsposten [Journal] 2017-11-07
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LectureFjørtoft, Helene Børretzen. (2017) Resistent lakselus. Marin samhandlingsarena , Ålesund 2017-03-22 - 2017-03-22
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LectureFjørtoft, Helene Børretzen. (2017) Resistent lakselus. Marin Arena Nordmøre , Kristiansund 2017-11-13 - 2017-11-13
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InterviewSætre, Gunhild; Gansel, Lars Christian; Fjørtoft, Helene Børretzen; Aas, Grete Hansen; Tuene, Stig Atle. (2017) Blåskjell kan bli våpen mot lakselus. https://www.nrk.no https://www.nrk.no [Internet] 2017-11-08
-
Interview
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InterviewSætre, Gunhild; Gansel, Lars Christian; Fjørtoft, Helene Børretzen; Aas, Grete Hansen; Tuene, Stig Atle. (2017) Blåskjell kan bli våpen mot lakselus. www.tv.nrk.no www.tv.nrk.no [TV] 2017-11-08
2012
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PosterFjørtoft, Helene Børretzen; Borgstrøm, Reidar; Skaala, Øystein. (2012) Different responses in growth of post-smolts of seatrout Salmo trutta and Atlantic salmon Salmo salar from the River Etne during a 25-year period; effects of climate change and sea-lice infection?. The 47th European Marine Biology Symposium , Arendal 2012-09-03 - 2012-09-07