Atlantic salmon and sea trout display synchronised smolt migration relative to linked environmental cues
Anadromous salmon and sea trout smolts face challenging migrations from freshwater to the marine environment characterised by high mortality. Therefore, the timing of smolt migration is likely to be critical for survival. Time-series comparing migration of Atlantic salmon and sea trout smolts in the...
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ftimr:oai:imr.brage.unit.no:11250/2683390 2023-05-15T15:30:28+02:00 Atlantic salmon and sea trout display synchronised smolt migration relative to linked environmental cues Harvey, Alison C. Glover, Kevin Wennevik, Vidar Skaala, Øystein 2020 application/pdf https://hdl.handle.net/11250/2683390 https://doi.org/10.1038/s41598-020-60588-0 eng eng Scientific Reports. 2020, 10 (1), 1-13. urn:issn:2045-2322 https://hdl.handle.net/11250/2683390 https://doi.org/10.1038/s41598-020-60588-0 cristin:1809846 1-13 10 Scientific Reports 1 Peer reviewed Journal article 2020 ftimr https://doi.org/10.1038/s41598-020-60588-0 2021-09-23T20:14:42Z Anadromous salmon and sea trout smolts face challenging migrations from freshwater to the marine environment characterised by high mortality. Therefore, the timing of smolt migration is likely to be critical for survival. Time-series comparing migration of Atlantic salmon and sea trout smolts in the same river, and their response to the same environmental cues, are scarce. Here, we analysed migration timing of ~41 000 Atlantic salmon and sea trout smolts over a 19-year period from the river Guddalselva, western Norway. Trout displayed a longer migration window in earlier years, which decreased over time to become more similar to the salmon migration window. On average, salmon migrated out of the river earlier than trout. Migration of both species was significantly influenced by river water temperature and water discharge, but their relative influence varied across the years. On average, body-length of smolts of both species overlapped, however, size differences were observed within the migration period and among the years. We conclude that salmon and trout smolts in this river are highly synchronised and migrate in response to the same range of linked environmental cues. publishedVersion Article in Journal/Newspaper Atlantic salmon Institute for Marine Research: Brage IMR Norway Scientific Reports 10 1 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
Anadromous salmon and sea trout smolts face challenging migrations from freshwater to the marine environment characterised by high mortality. Therefore, the timing of smolt migration is likely to be critical for survival. Time-series comparing migration of Atlantic salmon and sea trout smolts in the same river, and their response to the same environmental cues, are scarce. Here, we analysed migration timing of ~41 000 Atlantic salmon and sea trout smolts over a 19-year period from the river Guddalselva, western Norway. Trout displayed a longer migration window in earlier years, which decreased over time to become more similar to the salmon migration window. On average, salmon migrated out of the river earlier than trout. Migration of both species was significantly influenced by river water temperature and water discharge, but their relative influence varied across the years. On average, body-length of smolts of both species overlapped, however, size differences were observed within the migration period and among the years. We conclude that salmon and trout smolts in this river are highly synchronised and migrate in response to the same range of linked environmental cues. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Harvey, Alison C. Glover, Kevin Wennevik, Vidar Skaala, Øystein |
spellingShingle |
Harvey, Alison C. Glover, Kevin Wennevik, Vidar Skaala, Øystein Atlantic salmon and sea trout display synchronised smolt migration relative to linked environmental cues |
author_facet |
Harvey, Alison C. Glover, Kevin Wennevik, Vidar Skaala, Øystein |
author_sort |
Harvey, Alison C. |
title |
Atlantic salmon and sea trout display synchronised smolt migration relative to linked environmental cues |
title_short |
Atlantic salmon and sea trout display synchronised smolt migration relative to linked environmental cues |
title_full |
Atlantic salmon and sea trout display synchronised smolt migration relative to linked environmental cues |
title_fullStr |
Atlantic salmon and sea trout display synchronised smolt migration relative to linked environmental cues |
title_full_unstemmed |
Atlantic salmon and sea trout display synchronised smolt migration relative to linked environmental cues |
title_sort |
atlantic salmon and sea trout display synchronised smolt migration relative to linked environmental cues |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2683390 https://doi.org/10.1038/s41598-020-60588-0 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
1-13 10 Scientific Reports 1 |
op_relation |
Scientific Reports. 2020, 10 (1), 1-13. urn:issn:2045-2322 https://hdl.handle.net/11250/2683390 https://doi.org/10.1038/s41598-020-60588-0 cristin:1809846 |
op_doi |
https://doi.org/10.1038/s41598-020-60588-0 |
container_title |
Scientific Reports |
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10 |
container_issue |
1 |
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1766360911827697664 |