Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river
Abstract 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 th...
Published in: | Environmental Biology of Fishes |
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Springer Science and Business Media LLC
2021
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Online Access: | http://dx.doi.org/10.1007/s10641-021-01147-y https://link.springer.com/content/pdf/10.1007/s10641-021-01147-y.pdf https://link.springer.com/article/10.1007/s10641-021-01147-y/fulltext.html |
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crspringernat:10.1007/s10641-021-01147-y 2023-05-15T15:32:36+02:00 Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river Gabrielsen, Sven-Erik Lennox, Robert J. Wiers, Tore Barlaup, Bjørn T. NORCE Norwegian Research Centre AS 2021 http://dx.doi.org/10.1007/s10641-021-01147-y https://link.springer.com/content/pdf/10.1007/s10641-021-01147-y.pdf https://link.springer.com/article/10.1007/s10641-021-01147-y/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Environmental Biology of Fishes volume 104, issue 10, page 1207-1213 ISSN 0378-1909 1573-5133 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2021 crspringernat https://doi.org/10.1007/s10641-021-01147-y 2022-01-04T14:58:32Z Abstract 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. Article in Journal/Newspaper Atlantic salmon Pink salmon Springer Nature (via Crossref) Norway Environmental Biology of Fishes 104 10 1207 1213 |
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Open Polar |
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Springer Nature (via Crossref) |
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language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Gabrielsen, Sven-Erik Lennox, Robert J. Wiers, Tore Barlaup, Bjørn T. Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract 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. |
author2 |
NORCE Norwegian Research Centre AS |
format |
Article in Journal/Newspaper |
author |
Gabrielsen, Sven-Erik Lennox, Robert J. Wiers, Tore Barlaup, Bjørn T. |
author_facet |
Gabrielsen, Sven-Erik Lennox, Robert J. 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 |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1007/s10641-021-01147-y https://link.springer.com/content/pdf/10.1007/s10641-021-01147-y.pdf https://link.springer.com/article/10.1007/s10641-021-01147-y/fulltext.html |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Pink salmon |
genre_facet |
Atlantic salmon Pink salmon |
op_source |
Environmental Biology of Fishes volume 104, issue 10, page 1207-1213 ISSN 0378-1909 1573-5133 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
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 |
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1766363091361071104 |