Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river
Sea-run brown trout (Salmo trutta) have a highly phenotypically plastic life history that allows them to be effective colonizers and competitors in freshwater. This paper documents a previously unknown spawning behaviour in a brackish, tidally influenced estuary 14 km from the mouth of the Vosso Riv...
Published in: | Environmental Biology of Fishes |
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Online Access: | https://hdl.handle.net/11250/3130028 https://doi.org/10.1007/s10641-021-01147-y |
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ftnorce:oai:norceresearch.brage.unit.no:11250/3130028 2024-06-09T07:44:49+00:00 Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river Gabrielsen, Sven-Erik Lennox, Robert Wiers, Tore Barlaup, Bjørn T. 2021 application/pdf https://hdl.handle.net/11250/3130028 https://doi.org/10.1007/s10641-021-01147-y eng eng Environmental Biology of Fishes. 2021, . urn:issn:0378-1909 https://hdl.handle.net/11250/3130028 https://doi.org/10.1007/s10641-021-01147-y cristin:1945752 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The Author(s) 2021 Environmental Biology of Fishes 0 Peer reviewed Journal article 2021 ftnorce https://doi.org/10.1007/s10641-021-01147-y 2024-05-16T23:39:23Z Sea-run brown trout (Salmo trutta) have a highly phenotypically plastic life history that allows them to be effective colonizers and competitors in freshwater. This paper documents a previously unknown spawning behaviour in a brackish, tidally influenced estuary 14 km from the mouth of the Vosso River, a major Atlantic salmon- and sea-run brown trout–producing river in western Norway. Putative spawning gravel was observed, and sea-run brown trout deposited eggs that hatched in April. Survival of recruits was high (> 95%) in the tidal spawning gravel. These areas are strongly tidally influenced with a peak of 23.17 psu recorded at the lowest spawning ground. The observation of spawning so far from the river mouth may be unique in such a system with a long estuary but provides important insight into the biology of sea trout. Invasion of pink salmon, also known to spawn in estuaries, may negatively affect the competitive balance of sea trout with other salmonids in rivers where sea trout populations rely on recruitment from these relatively extreme spawning areas. Restoration of estuaries that have been modified by dredging or channelization may be important to ensure quality and heterogenous habitat for sea trout spawning given that haline spawning grounds could contribute to population resilience. Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river publishedVersion Article in Journal/Newspaper Atlantic salmon Pink salmon NORCE vitenarkiv (Norwegian Research Centre) Norway Environmental Biology of Fishes 104 10 1207 1213 |
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Open Polar |
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NORCE vitenarkiv (Norwegian Research Centre) |
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ftnorce |
language |
English |
description |
Sea-run brown trout (Salmo trutta) have a highly phenotypically plastic life history that allows them to be effective colonizers and competitors in freshwater. This paper documents a previously unknown spawning behaviour in a brackish, tidally influenced estuary 14 km from the mouth of the Vosso River, a major Atlantic salmon- and sea-run brown trout–producing river in western Norway. Putative spawning gravel was observed, and sea-run brown trout deposited eggs that hatched in April. Survival of recruits was high (> 95%) in the tidal spawning gravel. These areas are strongly tidally influenced with a peak of 23.17 psu recorded at the lowest spawning ground. The observation of spawning so far from the river mouth may be unique in such a system with a long estuary but provides important insight into the biology of sea trout. Invasion of pink salmon, also known to spawn in estuaries, may negatively affect the competitive balance of sea trout with other salmonids in rivers where sea trout populations rely on recruitment from these relatively extreme spawning areas. Restoration of estuaries that have been modified by dredging or channelization may be important to ensure quality and heterogenous habitat for sea trout spawning given that haline spawning grounds could contribute to population resilience. Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river publishedVersion |
format |
Article in Journal/Newspaper |
author |
Gabrielsen, Sven-Erik Lennox, Robert Wiers, Tore Barlaup, Bjørn T. |
spellingShingle |
Gabrielsen, Sven-Erik Lennox, Robert Wiers, Tore Barlaup, Bjørn T. Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river |
author_facet |
Gabrielsen, Sven-Erik Lennox, Robert Wiers, Tore Barlaup, Bjørn T. |
author_sort |
Gabrielsen, Sven-Erik |
title |
Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river |
title_short |
Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river |
title_full |
Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river |
title_fullStr |
Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river |
title_full_unstemmed |
Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river |
title_sort |
saltwater spawning grounds of sea-run brown trout (salmo trutta) in tidal waters of a major norwegian river |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/3130028 https://doi.org/10.1007/s10641-021-01147-y |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Pink salmon |
genre_facet |
Atlantic salmon Pink salmon |
op_source |
Environmental Biology of Fishes 0 |
op_relation |
Environmental Biology of Fishes. 2021, . urn:issn:0378-1909 https://hdl.handle.net/11250/3130028 https://doi.org/10.1007/s10641-021-01147-y cristin:1945752 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The Author(s) 2021 |
op_doi |
https://doi.org/10.1007/s10641-021-01147-y |
container_title |
Environmental Biology of Fishes |
container_volume |
104 |
container_issue |
10 |
container_start_page |
1207 |
op_container_end_page |
1213 |
_version_ |
1801373639959904256 |