Escaped farmed Atlantic salmon in Norwegian rivers during 1989–2013

Abstract We report on the data from an extensive monitoring programme for the occurrence of escaped farmed Atlantic salmon (Salmo salar) in Norwegian rivers for 25 years. This monitoring started as a 3-year research programme in 1989 and was followed by management authorities to cover the proportion...

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Published in:ICES Journal of Marine Science
Main Authors: Diserud, O H, Fiske, P, Sægrov, H, Urdal, K, Aronsen, T, Lo, H, Barlaup, B T, Niemelä, E, Orell, P, Erkinaro, J, Lund, R A, Økland, F, Østborg, G M, Hansen, L P, Hindar, K
Other Authors: Grant, W. Stewart, Environment Agency of Norway, Norwegian Directorate of Fisheries, Finnish Game and Fisheries Research Institute, Norwegian Institute for Nature Research
Format: Article in Journal/Newspaper
Language:English
Published: Oxford University Press (OUP) 2019
Subjects:
Online Access:http://dx.doi.org/10.1093/icesjms/fsy202
http://academic.oup.com/icesjms/article-pdf/76/4/1140/31238583/fsy202.pdf
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spelling croxfordunivpr:10.1093/icesjms/fsy202 2024-09-09T19:29:57+00:00 Escaped farmed Atlantic salmon in Norwegian rivers during 1989–2013 Diserud, O H Fiske, P Sægrov, H Urdal, K Aronsen, T Lo, H Barlaup, B T Niemelä, E Orell, P Erkinaro, J Lund, R A Økland, F Østborg, G M Hansen, L P Hindar, K Grant, W. Stewart Environment Agency of Norway Norwegian Directorate of Fisheries Finnish Game and Fisheries Research Institute Norwegian Institute for Nature Research 2019 http://dx.doi.org/10.1093/icesjms/fsy202 http://academic.oup.com/icesjms/article-pdf/76/4/1140/31238583/fsy202.pdf en eng Oxford University Press (OUP) http://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science volume 76, issue 4, page 1140-1150 ISSN 1054-3139 1095-9289 journal-article 2019 croxfordunivpr https://doi.org/10.1093/icesjms/fsy202 2024-08-27T04:18:29Z Abstract We report on the data from an extensive monitoring programme for the occurrence of escaped farmed Atlantic salmon (Salmo salar) in Norwegian rivers for 25 years. This monitoring started as a 3-year research programme in 1989 and was followed by management authorities to cover the proportional occurrence of escaped farmed Atlantic salmon in rivers during summer and autumn before spawning. Farmed salmon were distinguished from wild salmon by growth patterns in the scales. More than 362 000 salmon were registered by this programme. Here we present the historical data on escaped farmed salmon in catches 1989–2013 and a methodology for calculating averages across summer and autumn capture in rivers, across years and in regions, using weighted and unweighted observations. Catches of escaped farmed salmon show large spatial and temporal variation, with the early 1990s and early 2000s being periods of large influxes of farmed fish. Western Norway and parts of middle and northern Norway have shown particularly high incidences of escaped farmed fish. Because escaped farmed Atlantic salmon are competing and interbreeding with wild Atlantic salmon, as well as increasing the spread of disease-causing agents, they have become a major force driving the abundance and evolution of Atlantic salmon. Article in Journal/Newspaper Atlantic salmon Northern Norway Salmo salar Oxford University Press Norway ICES Journal of Marine Science 76 4 1140 1150
institution Open Polar
collection Oxford University Press
op_collection_id croxfordunivpr
language English
description Abstract We report on the data from an extensive monitoring programme for the occurrence of escaped farmed Atlantic salmon (Salmo salar) in Norwegian rivers for 25 years. This monitoring started as a 3-year research programme in 1989 and was followed by management authorities to cover the proportional occurrence of escaped farmed Atlantic salmon in rivers during summer and autumn before spawning. Farmed salmon were distinguished from wild salmon by growth patterns in the scales. More than 362 000 salmon were registered by this programme. Here we present the historical data on escaped farmed salmon in catches 1989–2013 and a methodology for calculating averages across summer and autumn capture in rivers, across years and in regions, using weighted and unweighted observations. Catches of escaped farmed salmon show large spatial and temporal variation, with the early 1990s and early 2000s being periods of large influxes of farmed fish. Western Norway and parts of middle and northern Norway have shown particularly high incidences of escaped farmed fish. Because escaped farmed Atlantic salmon are competing and interbreeding with wild Atlantic salmon, as well as increasing the spread of disease-causing agents, they have become a major force driving the abundance and evolution of Atlantic salmon.
author2 Grant, W. Stewart
Environment Agency of Norway
Norwegian Directorate of Fisheries
Finnish Game and Fisheries Research Institute
Norwegian Institute for Nature Research
format Article in Journal/Newspaper
author Diserud, O H
Fiske, P
Sægrov, H
Urdal, K
Aronsen, T
Lo, H
Barlaup, B T
Niemelä, E
Orell, P
Erkinaro, J
Lund, R A
Økland, F
Østborg, G M
Hansen, L P
Hindar, K
spellingShingle Diserud, O H
Fiske, P
Sægrov, H
Urdal, K
Aronsen, T
Lo, H
Barlaup, B T
Niemelä, E
Orell, P
Erkinaro, J
Lund, R A
Økland, F
Østborg, G M
Hansen, L P
Hindar, K
Escaped farmed Atlantic salmon in Norwegian rivers during 1989–2013
author_facet Diserud, O H
Fiske, P
Sægrov, H
Urdal, K
Aronsen, T
Lo, H
Barlaup, B T
Niemelä, E
Orell, P
Erkinaro, J
Lund, R A
Økland, F
Østborg, G M
Hansen, L P
Hindar, K
author_sort Diserud, O H
title Escaped farmed Atlantic salmon in Norwegian rivers during 1989–2013
title_short Escaped farmed Atlantic salmon in Norwegian rivers during 1989–2013
title_full Escaped farmed Atlantic salmon in Norwegian rivers during 1989–2013
title_fullStr Escaped farmed Atlantic salmon in Norwegian rivers during 1989–2013
title_full_unstemmed Escaped farmed Atlantic salmon in Norwegian rivers during 1989–2013
title_sort escaped farmed atlantic salmon in norwegian rivers during 1989–2013
publisher Oxford University Press (OUP)
publishDate 2019
url http://dx.doi.org/10.1093/icesjms/fsy202
http://academic.oup.com/icesjms/article-pdf/76/4/1140/31238583/fsy202.pdf
geographic Norway
geographic_facet Norway
genre Atlantic salmon
Northern Norway
Salmo salar
genre_facet Atlantic salmon
Northern Norway
Salmo salar
op_source ICES Journal of Marine Science
volume 76, issue 4, page 1140-1150
ISSN 1054-3139 1095-9289
op_rights http://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.1093/icesjms/fsy202
container_title ICES Journal of Marine Science
container_volume 76
container_issue 4
container_start_page 1140
op_container_end_page 1150
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