Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017
The parasitic salmon louse, and its documented resistance to chemotherapeutants, represents the most persistent environmental challenge to global salmonid aquaculture. We used a genetic marker associated with pyrethroid resistance to analyse ∼15 000 lice collected from the North Atlantic in the peri...
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Online Access: | https://hdl.handle.net/11250/2725732 https://doi.org/10.1093/icesjms/fsaa062 |
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ftimr:oai:imr.brage.unit.no:11250/2725732 2023-05-15T15:32:28+02:00 Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017 Fjørtoft, Helene Børretzen Nilsen, Frank Besnier, Francois Espedal, Per Gunnar Stene, Anne Tveten, Ann-Kristin Bjørn, Pål Arne Aspehaug, Vidar Glover, Kevin 2020 application/pdf https://hdl.handle.net/11250/2725732 https://doi.org/10.1093/icesjms/fsaa062 eng eng Norges forskningsråd: 203513 ICES Journal of Marine Science. 2020, 77 (5), 1806-1815. urn:issn:1054-3139 https://hdl.handle.net/11250/2725732 https://doi.org/10.1093/icesjms/fsaa062 cristin:1873214 1806-1815 77 ICES Journal of Marine Science 5 Peer reviewed Journal article 2020 ftimr https://doi.org/10.1093/icesjms/fsaa062 2021-09-23T20:16:04Z The parasitic salmon louse, and its documented resistance to chemotherapeutants, represents the most persistent environmental challenge to global salmonid aquaculture. We used a genetic marker associated with pyrethroid resistance to analyse ∼15 000 lice collected from the North Atlantic in the period 2000–2017. The genotype associated with resistance was not detected in lice collected from throughout the North Atlantic in the year 2000 or 2002. However, by the year 2009 onwards, it was found in lice from fish farms throughout much of the North Atlantic. It was also found in modest frequencies in lice collected from wild Atlantic salmon captured off Greenland. The most recent samples displayed very high frequencies of the genotype associated with resistance, particularly in intensive aquaculture regions of Norway (>90%) and Scotland (>70%). These results closely align with observations from the field. We suggest that pyrethroid resistance first emerged in Europe just before or around the year 2000 and was thereafter dispersed throughout much of the North Atlantic where its increased frequency was driven by extensive pyrethroid use. Although the resistant genotype was not detected in lice from Canada, it is likely to occur in very low frequencies that would quickly increase if pyrethroids were to be used in that region. publishedVersion Article in Journal/Newspaper Atlantic salmon Greenland North Atlantic Institute for Marine Research: Brage IMR Canada Greenland Norway ICES Journal of Marine Science 77 5 1806 1815 |
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Institute for Marine Research: Brage IMR |
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language |
English |
description |
The parasitic salmon louse, and its documented resistance to chemotherapeutants, represents the most persistent environmental challenge to global salmonid aquaculture. We used a genetic marker associated with pyrethroid resistance to analyse ∼15 000 lice collected from the North Atlantic in the period 2000–2017. The genotype associated with resistance was not detected in lice collected from throughout the North Atlantic in the year 2000 or 2002. However, by the year 2009 onwards, it was found in lice from fish farms throughout much of the North Atlantic. It was also found in modest frequencies in lice collected from wild Atlantic salmon captured off Greenland. The most recent samples displayed very high frequencies of the genotype associated with resistance, particularly in intensive aquaculture regions of Norway (>90%) and Scotland (>70%). These results closely align with observations from the field. We suggest that pyrethroid resistance first emerged in Europe just before or around the year 2000 and was thereafter dispersed throughout much of the North Atlantic where its increased frequency was driven by extensive pyrethroid use. Although the resistant genotype was not detected in lice from Canada, it is likely to occur in very low frequencies that would quickly increase if pyrethroids were to be used in that region. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Fjørtoft, Helene Børretzen Nilsen, Frank Besnier, Francois Espedal, Per Gunnar Stene, Anne Tveten, Ann-Kristin Bjørn, Pål Arne Aspehaug, Vidar Glover, Kevin |
spellingShingle |
Fjørtoft, Helene Børretzen Nilsen, Frank Besnier, Francois Espedal, Per Gunnar Stene, Anne Tveten, Ann-Kristin Bjørn, Pål Arne Aspehaug, Vidar Glover, Kevin Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017 |
author_facet |
Fjørtoft, Helene Børretzen Nilsen, Frank Besnier, Francois Espedal, Per Gunnar Stene, Anne Tveten, Ann-Kristin Bjørn, Pål Arne Aspehaug, Vidar Glover, Kevin |
author_sort |
Fjørtoft, Helene Børretzen |
title |
Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017 |
title_short |
Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017 |
title_full |
Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017 |
title_fullStr |
Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017 |
title_full_unstemmed |
Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017 |
title_sort |
aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the north atlantic in the years 2000–2017 |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2725732 https://doi.org/10.1093/icesjms/fsaa062 |
geographic |
Canada Greenland Norway |
geographic_facet |
Canada Greenland Norway |
genre |
Atlantic salmon Greenland North Atlantic |
genre_facet |
Atlantic salmon Greenland North Atlantic |
op_source |
1806-1815 77 ICES Journal of Marine Science 5 |
op_relation |
Norges forskningsråd: 203513 ICES Journal of Marine Science. 2020, 77 (5), 1806-1815. urn:issn:1054-3139 https://hdl.handle.net/11250/2725732 https://doi.org/10.1093/icesjms/fsaa062 cristin:1873214 |
op_doi |
https://doi.org/10.1093/icesjms/fsaa062 |
container_title |
ICES Journal of Marine Science |
container_volume |
77 |
container_issue |
5 |
container_start_page |
1806 |
op_container_end_page |
1815 |
_version_ |
1766362969579454464 |