Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance
Atlantic salmon Salmo salar aquaculture is based on the use of open-pen sea cages, with the consequence that farmed fish are both recipients and sources of pathogens from surrounding waters. Currently, the parasitic salmon louse Lepeophtheirus salmonis represents the most Critical biological challen...
Published in: | Aquaculture Environment Interactions |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | http://hdl.handle.net/11250/2614516 https://doi.org/10.3354/aei00322 |
id |
ftninstnf:oai:brage.nina.no:11250/2614516 |
---|---|
record_format |
openpolar |
spelling |
ftninstnf:oai:brage.nina.no:11250/2614516 2023-05-15T15:31:05+02:00 Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance Fjørtoft, Helene Børretzen Nilsen, Frank Besnier, Francois Stene, Anne Bjørn, Pål Arne Tveten, Ann-Kristin Aspehaug, Vidar Teis Finstad, Bengt Glover, Kevin Norge, Noreg, Norway, Finnmark, Trøndelag, Møre og Romsdal, Sogn og Fjordane, Hordaland, Rogaland, Agder 2019 application/pdf http://hdl.handle.net/11250/2614516 https://doi.org/10.3354/aei00322 eng eng urn:issn:1869-215X http://hdl.handle.net/11250/2614516 https://doi.org/10.3354/aei00322 cristin:1723276 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The authors 2019. CC-BY 459-468 11 Aquaculture Environment Interactions Lepeophtheirus salmonis Resistance Pyrethroid Infestations Aquaculture Wild salmonids VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Journal article 2019 ftninstnf https://doi.org/10.3354/aei00322 2021-12-23T07:17:05Z Atlantic salmon Salmo salar aquaculture is based on the use of open-pen sea cages, with the consequence that farmed fish are both recipients and sources of pathogens from surrounding waters. Currently, the parasitic salmon louse Lepeophtheirus salmonis represents the most Critical biological challenge for salmonid aquaculture in the Atlantic Ocean. This has, in part, been driven by the emergence of resistance to the few delousing agents available to the industry. In the present study, we investigated resistance to pyrethroids. Lice sampled in 2014 from wild Atlantic salmon and sea trout Salmo trutta hosts from Norway were genotyped using the genetic marker associated with pyrethroid resistance and compared to data from lice sampled on farmed hosts in the same regions and period. The resistant genotype was observed in lice from both wild hosts in all regions of Norway. In all regions, frequencies of the resistant genotype were similar for lice fromsea trout and farmed salmon, approaching fixation in some areas. Inmost regions, lice fromwild salmon displayed lower frequencies of the resistant genotype than lice from both wild sea trout and farmed salmon. Lice are only directly exposed to chemical selection within aquaculture. Therefore, these data demonstrate an extensive gene flow and exchange of lice between farmed and wild salmonid hosts. It is also suggested that the observed lower frequency of the resistant genotype in lice from wild salmon returning to the coast is due to a dilution effect mediated by infestation with lice originating from outside farming areas while in the oceanic feeding grounds. Article in Journal/Newspaper Atlantic salmon Finnmark Salmo salar Finnmark Norwegian Institute for Nature Research: Brage NINA Norway Sogn ENVELOPE(-21.133,-21.133,63.994,63.994) Aquaculture Environment Interactions 11 459 468 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
Lepeophtheirus salmonis Resistance Pyrethroid Infestations Aquaculture Wild salmonids VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
spellingShingle |
Lepeophtheirus salmonis Resistance Pyrethroid Infestations Aquaculture Wild salmonids VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Fjørtoft, Helene Børretzen Nilsen, Frank Besnier, Francois Stene, Anne Bjørn, Pål Arne Tveten, Ann-Kristin Aspehaug, Vidar Teis Finstad, Bengt Glover, Kevin Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance |
topic_facet |
Lepeophtheirus salmonis Resistance Pyrethroid Infestations Aquaculture Wild salmonids VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
description |
Atlantic salmon Salmo salar aquaculture is based on the use of open-pen sea cages, with the consequence that farmed fish are both recipients and sources of pathogens from surrounding waters. Currently, the parasitic salmon louse Lepeophtheirus salmonis represents the most Critical biological challenge for salmonid aquaculture in the Atlantic Ocean. This has, in part, been driven by the emergence of resistance to the few delousing agents available to the industry. In the present study, we investigated resistance to pyrethroids. Lice sampled in 2014 from wild Atlantic salmon and sea trout Salmo trutta hosts from Norway were genotyped using the genetic marker associated with pyrethroid resistance and compared to data from lice sampled on farmed hosts in the same regions and period. The resistant genotype was observed in lice from both wild hosts in all regions of Norway. In all regions, frequencies of the resistant genotype were similar for lice fromsea trout and farmed salmon, approaching fixation in some areas. Inmost regions, lice fromwild salmon displayed lower frequencies of the resistant genotype than lice from both wild sea trout and farmed salmon. Lice are only directly exposed to chemical selection within aquaculture. Therefore, these data demonstrate an extensive gene flow and exchange of lice between farmed and wild salmonid hosts. It is also suggested that the observed lower frequency of the resistant genotype in lice from wild salmon returning to the coast is due to a dilution effect mediated by infestation with lice originating from outside farming areas while in the oceanic feeding grounds. |
format |
Article in Journal/Newspaper |
author |
Fjørtoft, Helene Børretzen Nilsen, Frank Besnier, Francois Stene, Anne Bjørn, Pål Arne Tveten, Ann-Kristin Aspehaug, Vidar Teis Finstad, Bengt Glover, Kevin |
author_facet |
Fjørtoft, Helene Børretzen Nilsen, Frank Besnier, Francois Stene, Anne Bjørn, Pål Arne Tveten, Ann-Kristin Aspehaug, Vidar Teis Finstad, Bengt Glover, Kevin |
author_sort |
Fjørtoft, Helene Børretzen |
title |
Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance |
title_short |
Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance |
title_full |
Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance |
title_fullStr |
Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance |
title_full_unstemmed |
Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance |
title_sort |
salmon lice sampled from wild atlantic salmon and sea trout throughout norway display high frequencies of the genotype associated with pyrethroid resistance |
publishDate |
2019 |
url |
http://hdl.handle.net/11250/2614516 https://doi.org/10.3354/aei00322 |
op_coverage |
Norge, Noreg, Norway, Finnmark, Trøndelag, Møre og Romsdal, Sogn og Fjordane, Hordaland, Rogaland, Agder |
long_lat |
ENVELOPE(-21.133,-21.133,63.994,63.994) |
geographic |
Norway Sogn |
geographic_facet |
Norway Sogn |
genre |
Atlantic salmon Finnmark Salmo salar Finnmark |
genre_facet |
Atlantic salmon Finnmark Salmo salar Finnmark |
op_source |
459-468 11 Aquaculture Environment Interactions |
op_relation |
urn:issn:1869-215X http://hdl.handle.net/11250/2614516 https://doi.org/10.3354/aei00322 cristin:1723276 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The authors 2019. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3354/aei00322 |
container_title |
Aquaculture Environment Interactions |
container_volume |
11 |
container_start_page |
459 |
op_container_end_page |
468 |
_version_ |
1766361568682967040 |