Experiences from targeted removal of farmed Atlantic salmon from Norwegian rivers
Abstract Farmed salmon escaping from aquaculture and interbreeding with wild conspecifics pose a significant threat to the genetic integrity of natural salmon populations. Despite advancements in aquaculture security, escape incidents persist, prompting the need for effective mitigation strategies....
Published in: | ICES Journal of Marine Science |
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2024
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsae047 https://academic.oup.com/icesjms/advance-article-pdf/doi/10.1093/icesjms/fsae047/57214005/fsae047.pdf |
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croxfordunivpr:10.1093/icesjms/fsae047 2024-05-12T08:01:21+00:00 Experiences from targeted removal of farmed Atlantic salmon from Norwegian rivers Skolgund, Helge Kambestad, Marius Normann, Eirik Straume Wiers, Tore Lehmann, Gunnar Bekke Urdal, Kurt Barlaup, Bjørn Torgeir Vollset, Knut Wiik Ojaveer, Henn NORCE Norwegian Research Centre 2024 http://dx.doi.org/10.1093/icesjms/fsae047 https://academic.oup.com/icesjms/advance-article-pdf/doi/10.1093/icesjms/fsae047/57214005/fsae047.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science ISSN 1054-3139 1095-9289 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2024 croxfordunivpr https://doi.org/10.1093/icesjms/fsae047 2024-04-18T08:17:21Z Abstract Farmed salmon escaping from aquaculture and interbreeding with wild conspecifics pose a significant threat to the genetic integrity of natural salmon populations. Despite advancements in aquaculture security, escape incidents persist, prompting the need for effective mitigation strategies. This study summarizes experiences from efforts to remove escaped farmed salmon over a 12-year period in 63 western Norwegian rivers, using either (1) spearfishing during snorkelling by trained personnel or (2) traditional fishing methods employed by local groups. Recaptured farmed salmon ranged widely in size and included both spawners as well as immature fish, demonstrating that farmed fish entering rivers comprise fish of different ages and escape histories. Traditional fishing by locals recaptured the highest number of farmed fish, while removal during snorkelling in general captured larger and mature fish. On average, 53% of the farmed salmon observed during snorkelling were recaptured. This efficacy was influenced by the number of farmed fish present and the size of the farmed fish. In addition, efficacy increased over time, indicating that the removal team became more efficient. The study underscores that active removal, when executed judiciously, contributes to reducing the ecological risks associated with escaped farmed fish, complementing broader strategies for sustainable aquaculture. Article in Journal/Newspaper Atlantic salmon Oxford University Press ICES Journal of Marine Science |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Skolgund, Helge Kambestad, Marius Normann, Eirik Straume Wiers, Tore Lehmann, Gunnar Bekke Urdal, Kurt Barlaup, Bjørn Torgeir Vollset, Knut Wiik Experiences from targeted removal of farmed Atlantic salmon from Norwegian rivers |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Farmed salmon escaping from aquaculture and interbreeding with wild conspecifics pose a significant threat to the genetic integrity of natural salmon populations. Despite advancements in aquaculture security, escape incidents persist, prompting the need for effective mitigation strategies. This study summarizes experiences from efforts to remove escaped farmed salmon over a 12-year period in 63 western Norwegian rivers, using either (1) spearfishing during snorkelling by trained personnel or (2) traditional fishing methods employed by local groups. Recaptured farmed salmon ranged widely in size and included both spawners as well as immature fish, demonstrating that farmed fish entering rivers comprise fish of different ages and escape histories. Traditional fishing by locals recaptured the highest number of farmed fish, while removal during snorkelling in general captured larger and mature fish. On average, 53% of the farmed salmon observed during snorkelling were recaptured. This efficacy was influenced by the number of farmed fish present and the size of the farmed fish. In addition, efficacy increased over time, indicating that the removal team became more efficient. The study underscores that active removal, when executed judiciously, contributes to reducing the ecological risks associated with escaped farmed fish, complementing broader strategies for sustainable aquaculture. |
author2 |
Ojaveer, Henn NORCE Norwegian Research Centre |
format |
Article in Journal/Newspaper |
author |
Skolgund, Helge Kambestad, Marius Normann, Eirik Straume Wiers, Tore Lehmann, Gunnar Bekke Urdal, Kurt Barlaup, Bjørn Torgeir Vollset, Knut Wiik |
author_facet |
Skolgund, Helge Kambestad, Marius Normann, Eirik Straume Wiers, Tore Lehmann, Gunnar Bekke Urdal, Kurt Barlaup, Bjørn Torgeir Vollset, Knut Wiik |
author_sort |
Skolgund, Helge |
title |
Experiences from targeted removal of farmed Atlantic salmon from Norwegian rivers |
title_short |
Experiences from targeted removal of farmed Atlantic salmon from Norwegian rivers |
title_full |
Experiences from targeted removal of farmed Atlantic salmon from Norwegian rivers |
title_fullStr |
Experiences from targeted removal of farmed Atlantic salmon from Norwegian rivers |
title_full_unstemmed |
Experiences from targeted removal of farmed Atlantic salmon from Norwegian rivers |
title_sort |
experiences from targeted removal of farmed atlantic salmon from norwegian rivers |
publisher |
Oxford University Press (OUP) |
publishDate |
2024 |
url |
http://dx.doi.org/10.1093/icesjms/fsae047 https://academic.oup.com/icesjms/advance-article-pdf/doi/10.1093/icesjms/fsae047/57214005/fsae047.pdf |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
ICES Journal of Marine Science ISSN 1054-3139 1095-9289 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsae047 |
container_title |
ICES Journal of Marine Science |
_version_ |
1798843480115511296 |