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  1. Employees

Språkvelger

Norsk

Helene Børretzen Fjørtoft

Helene Børretzen Fjørtoft


helene.b.fjortoft@ntnu.no
+4770161618 Kompasset, K261, Ålesund
About Publications Media

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

  • Chronological
  • By category
  • See all publications in Cristin

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

  • 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
  • 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

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. Orkana Forlag
    Academic chapter/article/Conference paper

2017

  • 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
  • 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

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. Orkana Forlag
    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
  • 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
  • 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; 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
  • 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
  • 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; 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. Orkana Forlag
    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. Orkana Forlag
    Academic chapter/article/Conference paper

Media

2017

  • Interview
    Fjørtoft, Helene Børretzen. (2017) Nett.no Nett.no [Internet] 2017-03-19
  • Lecture
    Fjørtoft, Helene Børretzen. (2017) Resistent lakselus. Møre og Romsdal fylkeskommune, Forskningsrådet, Innovasjon N Marin samhandlingsarena , Ålesund 2017-03-22 - 2017-03-22
  • Interview
    Fjørtoft, Helene Børretzen; Stige, Per Ove. (2017) -Lusa kjem frå oppdrett. Sunnmørsposten Sunnmørsposten [Newspaper] 2017-11-07
  • Lecture
    Fjørtoft, Helene Børretzen. (2017) Resistent lakselus. Møre og Romsdal fylkeskommune, Møreforsking, Innovasjon Norg Marin Arena Nordmøre , Kristiansund 2017-11-13 - 2017-11-13
  • Documentary
    Sætre, Gunhild; Gansel, Lars Christian; Fjørtoft, Helene Børretzen; Aas, Grete Hansen; Tuene, Stig Atle. (2017) www.tv.nrk.no www.tv.nrk.no [TV] 2017-11-08
  • Documentary
    Sætre, Gunhild; Gansel, Lars Christian; Fjørtoft, Helene Børretzen; Aas, Grete Hansen; Tuene, Stig Atle. (2017) https://www.nrk.no https://www.nrk.no [Internet] 2017-11-08

2012

  • Poster
    Fjørtoft, 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
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