Development of a risk assessment method for sea trout in coastal areas exploited for aquaculture
The regulation of aquaculture production in Norway considers the potential impact of salmon lice on wild fish. However, most attention has been focused on impacts on wild Atlantic salmon, despite the fact that anadromous brown trout spend the majority of their marine phase in coastal waters, where s...
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ftdoajarticles:oai:doaj.org/article:08eb9ee9afc74018b063009aced479c2 2023-05-15T15:32:51+02:00 Development of a risk assessment method for sea trout in coastal areas exploited for aquaculture B Finstad AD Sandvik O Ugedal KW Vollset Ø Karlsen JG Davidsen H Sægrov RJ Lennox 2021-05-01T00:00:00Z https://doi.org/10.3354/aei00391 https://doaj.org/article/08eb9ee9afc74018b063009aced479c2 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v13/p133-144/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00391 https://doaj.org/article/08eb9ee9afc74018b063009aced479c2 Aquaculture Environment Interactions, Vol 13, Pp 133-144 (2021) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2021 ftdoajarticles https://doi.org/10.3354/aei00391 2022-12-31T06:40:11Z The regulation of aquaculture production in Norway considers the potential impact of salmon lice on wild fish. However, most attention has been focused on impacts on wild Atlantic salmon, despite the fact that anadromous brown trout spend the majority of their marine phase in coastal waters, where salmon lice have the highest impact. In the present study, we first suggest changes in marine living area and marine feeding time as sustainability indicators for first-time migrant sea trout, as high salmon lice densities may exclude sea trout from otherwise usable habitat and force them to return early to freshwater. Further, a method based on a bio-hydrodynamic model was developed to serve as a proxy for these indicators. The method accounted for the size, migration timing and spatial extent of sea trout and was demonstrated in 2 Norwegian salmon aquaculture production areas, Hardangerfjord (PO3) and Romsdalsfjord (PO5), and 2 focal rivers from within each fjord. Based on these comparisons, we exemplify how the change in marine living area and marine feeding time differed between PO3 and PO5 and within the areas. Sea trout migrating to sea late (June 5) were always more affected by lice than those migrating early (April 24) or at intermediate dates (May 15). Our estimates revealed dramatic potential impacts of salmon lice on sea trout populations, which were greatly influenced by spatial and temporal aspects. Considering the negative impacts of salmon lice on sea trout, a holistic view of environmental interactions between aquaculture and wild species that depend on habitats exploited for production is necessary. Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles Norway Aquaculture Environment Interactions 13 133 144 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 B Finstad AD Sandvik O Ugedal KW Vollset Ø Karlsen JG Davidsen H Sægrov RJ Lennox Development of a risk assessment method for sea trout in coastal areas exploited for aquaculture |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
description |
The regulation of aquaculture production in Norway considers the potential impact of salmon lice on wild fish. However, most attention has been focused on impacts on wild Atlantic salmon, despite the fact that anadromous brown trout spend the majority of their marine phase in coastal waters, where salmon lice have the highest impact. In the present study, we first suggest changes in marine living area and marine feeding time as sustainability indicators for first-time migrant sea trout, as high salmon lice densities may exclude sea trout from otherwise usable habitat and force them to return early to freshwater. Further, a method based on a bio-hydrodynamic model was developed to serve as a proxy for these indicators. The method accounted for the size, migration timing and spatial extent of sea trout and was demonstrated in 2 Norwegian salmon aquaculture production areas, Hardangerfjord (PO3) and Romsdalsfjord (PO5), and 2 focal rivers from within each fjord. Based on these comparisons, we exemplify how the change in marine living area and marine feeding time differed between PO3 and PO5 and within the areas. Sea trout migrating to sea late (June 5) were always more affected by lice than those migrating early (April 24) or at intermediate dates (May 15). Our estimates revealed dramatic potential impacts of salmon lice on sea trout populations, which were greatly influenced by spatial and temporal aspects. Considering the negative impacts of salmon lice on sea trout, a holistic view of environmental interactions between aquaculture and wild species that depend on habitats exploited for production is necessary. |
format |
Article in Journal/Newspaper |
author |
B Finstad AD Sandvik O Ugedal KW Vollset Ø Karlsen JG Davidsen H Sægrov RJ Lennox |
author_facet |
B Finstad AD Sandvik O Ugedal KW Vollset Ø Karlsen JG Davidsen H Sægrov RJ Lennox |
author_sort |
B Finstad |
title |
Development of a risk assessment method for sea trout in coastal areas exploited for aquaculture |
title_short |
Development of a risk assessment method for sea trout in coastal areas exploited for aquaculture |
title_full |
Development of a risk assessment method for sea trout in coastal areas exploited for aquaculture |
title_fullStr |
Development of a risk assessment method for sea trout in coastal areas exploited for aquaculture |
title_full_unstemmed |
Development of a risk assessment method for sea trout in coastal areas exploited for aquaculture |
title_sort |
development of a risk assessment method for sea trout in coastal areas exploited for aquaculture |
publisher |
Inter-Research |
publishDate |
2021 |
url |
https://doi.org/10.3354/aei00391 https://doaj.org/article/08eb9ee9afc74018b063009aced479c2 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Aquaculture Environment Interactions, Vol 13, Pp 133-144 (2021) |
op_relation |
https://www.int-res.com/abstracts/aei/v13/p133-144/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00391 https://doaj.org/article/08eb9ee9afc74018b063009aced479c2 |
op_doi |
https://doi.org/10.3354/aei00391 |
container_title |
Aquaculture Environment Interactions |
container_volume |
13 |
container_start_page |
133 |
op_container_end_page |
144 |
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1766363329106804736 |