Synchrony and multimodality in the timing of Atlantic salmon smolt migration in two Norwegian fjords
The timing of the smolt migration of Atlantic salmon (Salmo salar) is a phenological trait increasingly important to the fitness of this species. Understanding when and how smolts migrate to the sea is crucial to understanding how salmon populations will be affected by both climate change and the el...
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2979141 2023-05-15T15:31:18+02:00 Synchrony and multimodality in the timing of Atlantic salmon smolt migration in two Norwegian fjords Bjerck, Helge Bostwick Urke, Henning Andre Haugen, Thrond Oddvar Alfredsen, Jo Arve Ulvund, John Birger Kristensen, Torstein 2021 application/pdf https://hdl.handle.net/11250/2979141 https://doi.org/10.1038/s41598-021-85941-9 eng eng Nature Fiskeri- og havbruksnæringens forskningsfinansiering: 901575 Scientific Reports. 2021, 11 . urn:issn:2045-2322 https://hdl.handle.net/11250/2979141 https://doi.org/10.1038/s41598-021-85941-9 cristin:1900185 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 14 11 Scientific Reports Peer reviewed Journal article 2021 ftntnutrondheimi https://doi.org/10.1038/s41598-021-85941-9 2022-02-16T23:38:03Z The timing of the smolt migration of Atlantic salmon (Salmo salar) is a phenological trait increasingly important to the fitness of this species. Understanding when and how smolts migrate to the sea is crucial to understanding how salmon populations will be affected by both climate change and the elevated salmon lice concentrations produced by salmon farms. Here, acoustic telemetry was used to monitor the fjord migration of wild post-smolts from four rivers across two fjord systems in western Norway. Smolts began their migration throughout the month of May in all populations. Within-population, the timing of migration was multimodal with peaks in migration determined by the timing of spring floods. As a result, migrations were synchronized across populations with similar hydrology. There was little indication that the timing of migration had an impact on survival from the river mouth to the outer fjord. However, populations with longer fjord migrations experienced lower survival rates and had higher variance in fjord residency times. Explicit consideration of the multimodality inherent to the timing of smolt migration in these populations may help predict when smolts are in the fjord, as these modes seem predictable from available environmental data. publishedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar NTNU Open Archive (Norwegian University of Science and Technology) Norway Scientific Reports 11 1 |
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Open Polar |
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NTNU Open Archive (Norwegian University of Science and Technology) |
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ftntnutrondheimi |
language |
English |
description |
The timing of the smolt migration of Atlantic salmon (Salmo salar) is a phenological trait increasingly important to the fitness of this species. Understanding when and how smolts migrate to the sea is crucial to understanding how salmon populations will be affected by both climate change and the elevated salmon lice concentrations produced by salmon farms. Here, acoustic telemetry was used to monitor the fjord migration of wild post-smolts from four rivers across two fjord systems in western Norway. Smolts began their migration throughout the month of May in all populations. Within-population, the timing of migration was multimodal with peaks in migration determined by the timing of spring floods. As a result, migrations were synchronized across populations with similar hydrology. There was little indication that the timing of migration had an impact on survival from the river mouth to the outer fjord. However, populations with longer fjord migrations experienced lower survival rates and had higher variance in fjord residency times. Explicit consideration of the multimodality inherent to the timing of smolt migration in these populations may help predict when smolts are in the fjord, as these modes seem predictable from available environmental data. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Bjerck, Helge Bostwick Urke, Henning Andre Haugen, Thrond Oddvar Alfredsen, Jo Arve Ulvund, John Birger Kristensen, Torstein |
spellingShingle |
Bjerck, Helge Bostwick Urke, Henning Andre Haugen, Thrond Oddvar Alfredsen, Jo Arve Ulvund, John Birger Kristensen, Torstein Synchrony and multimodality in the timing of Atlantic salmon smolt migration in two Norwegian fjords |
author_facet |
Bjerck, Helge Bostwick Urke, Henning Andre Haugen, Thrond Oddvar Alfredsen, Jo Arve Ulvund, John Birger Kristensen, Torstein |
author_sort |
Bjerck, Helge Bostwick |
title |
Synchrony and multimodality in the timing of Atlantic salmon smolt migration in two Norwegian fjords |
title_short |
Synchrony and multimodality in the timing of Atlantic salmon smolt migration in two Norwegian fjords |
title_full |
Synchrony and multimodality in the timing of Atlantic salmon smolt migration in two Norwegian fjords |
title_fullStr |
Synchrony and multimodality in the timing of Atlantic salmon smolt migration in two Norwegian fjords |
title_full_unstemmed |
Synchrony and multimodality in the timing of Atlantic salmon smolt migration in two Norwegian fjords |
title_sort |
synchrony and multimodality in the timing of atlantic salmon smolt migration in two norwegian fjords |
publisher |
Nature |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2979141 https://doi.org/10.1038/s41598-021-85941-9 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
14 11 Scientific Reports |
op_relation |
Fiskeri- og havbruksnæringens forskningsfinansiering: 901575 Scientific Reports. 2021, 11 . urn:issn:2045-2322 https://hdl.handle.net/11250/2979141 https://doi.org/10.1038/s41598-021-85941-9 cristin:1900185 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-021-85941-9 |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
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1766361785421529088 |