Salmon lice in the Pacific Ocean show evidence of evolved resistance to parasiticide treatment
Parasitic salmon lice (Lepeophtheirus salmonis) threaten the economic and ecological sustainability of salmon farming, and their evolved resistance to treatment with emamectin benzoate (EMB) has been a major problem for salmon farming in the Atlantic Ocean. In contrast, the Pacific Ocean, where wild...
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ftimr:oai:imr.brage.unit.no:11250/3000085 2023-05-15T16:16:29+02:00 Salmon lice in the Pacific Ocean show evidence of evolved resistance to parasiticide treatment Godwin, Sean C. Bateman, Andrew W. Kuparinen, Anna Johnson, Rick Powell, John Speck, Kelly Hutchings, Jeffrey 2022 application/pdf https://hdl.handle.net/11250/3000085 https://doi.org/10.1038/s41598-022-07464-1 eng eng Scientific Reports. 2022, 12 (1), . urn:issn:2045-2322 https://hdl.handle.net/11250/3000085 https://doi.org/10.1038/s41598-022-07464-1 cristin:2028453 6 12 Scientific Reports 1 Peer reviewed Journal article 2022 ftimr https://doi.org/10.1038/s41598-022-07464-1 2022-06-29T22:40:30Z Parasitic salmon lice (Lepeophtheirus salmonis) threaten the economic and ecological sustainability of salmon farming, and their evolved resistance to treatment with emamectin benzoate (EMB) has been a major problem for salmon farming in the Atlantic Ocean. In contrast, the Pacific Ocean, where wild salmon are far more abundant, has not seen widespread evolution of EMB-resistant lice. Here, we use EMB bioassays and counts of lice on farms from the Broughton Archipelago, Canada—a core region of salmon farming in the Pacific—to show that EMB sensitivity has dramatically decreased since 2010, concurrent with marked decrease in the field efficacy of EMB treatments. Notably, these bioassay data were not made available through public reporting by industry or by the federal regulator, but rather through Indigenous-led agreements that created a legal obligation for salmon-farming companies to provide data to First Nations. Our results suggest that salmon lice in the Pacific Ocean have recently evolved substantial resistance to EMB, and that salmon-louse outbreaks on Pacific farms will therefore be more difficult to control in the coming years. publishedVersion Article in Journal/Newspaper First Nations Institute for Marine Research: Brage IMR Canada Pacific Scientific Reports 12 1 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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English |
description |
Parasitic salmon lice (Lepeophtheirus salmonis) threaten the economic and ecological sustainability of salmon farming, and their evolved resistance to treatment with emamectin benzoate (EMB) has been a major problem for salmon farming in the Atlantic Ocean. In contrast, the Pacific Ocean, where wild salmon are far more abundant, has not seen widespread evolution of EMB-resistant lice. Here, we use EMB bioassays and counts of lice on farms from the Broughton Archipelago, Canada—a core region of salmon farming in the Pacific—to show that EMB sensitivity has dramatically decreased since 2010, concurrent with marked decrease in the field efficacy of EMB treatments. Notably, these bioassay data were not made available through public reporting by industry or by the federal regulator, but rather through Indigenous-led agreements that created a legal obligation for salmon-farming companies to provide data to First Nations. Our results suggest that salmon lice in the Pacific Ocean have recently evolved substantial resistance to EMB, and that salmon-louse outbreaks on Pacific farms will therefore be more difficult to control in the coming years. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Godwin, Sean C. Bateman, Andrew W. Kuparinen, Anna Johnson, Rick Powell, John Speck, Kelly Hutchings, Jeffrey |
spellingShingle |
Godwin, Sean C. Bateman, Andrew W. Kuparinen, Anna Johnson, Rick Powell, John Speck, Kelly Hutchings, Jeffrey Salmon lice in the Pacific Ocean show evidence of evolved resistance to parasiticide treatment |
author_facet |
Godwin, Sean C. Bateman, Andrew W. Kuparinen, Anna Johnson, Rick Powell, John Speck, Kelly Hutchings, Jeffrey |
author_sort |
Godwin, Sean C. |
title |
Salmon lice in the Pacific Ocean show evidence of evolved resistance to parasiticide treatment |
title_short |
Salmon lice in the Pacific Ocean show evidence of evolved resistance to parasiticide treatment |
title_full |
Salmon lice in the Pacific Ocean show evidence of evolved resistance to parasiticide treatment |
title_fullStr |
Salmon lice in the Pacific Ocean show evidence of evolved resistance to parasiticide treatment |
title_full_unstemmed |
Salmon lice in the Pacific Ocean show evidence of evolved resistance to parasiticide treatment |
title_sort |
salmon lice in the pacific ocean show evidence of evolved resistance to parasiticide treatment |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3000085 https://doi.org/10.1038/s41598-022-07464-1 |
geographic |
Canada Pacific |
geographic_facet |
Canada Pacific |
genre |
First Nations |
genre_facet |
First Nations |
op_source |
6 12 Scientific Reports 1 |
op_relation |
Scientific Reports. 2022, 12 (1), . urn:issn:2045-2322 https://hdl.handle.net/11250/3000085 https://doi.org/10.1038/s41598-022-07464-1 cristin:2028453 |
op_doi |
https://doi.org/10.1038/s41598-022-07464-1 |
container_title |
Scientific Reports |
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12 |
container_issue |
1 |
_version_ |
1766002342897909760 |