A test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord
Atlantic salmon (Salmo salar) smolts are vulnerable to predators during their seaward migration. To determine whether sea trout (Salmo trutta) exhibit a coupled migration to exploit the smolt run, we tracked Atlantic salmon smolts exiting the Vosso River in 2012 (n = 40) and 2013 (n = 50) as well as...
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ftnorce:oai:norceresearch.brage.unit.no:11250/2648098 2023-05-15T15:30:48+02:00 A test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord Lennox, Robert J. Espedal, Espen Olsen Barlaup, Bjørn Torgeir Mahlum, Shad Kenneth Vollset, Knut 2019 application/pdf https://hdl.handle.net/11250/2648098 eng eng Boreal environment research. 2019, 24 189-199. urn:issn:1239-6095 https://hdl.handle.net/11250/2648098 cristin:1767868 Copyright 2019 Boreal Environment Research Publishing Board Boreal environment research 24 189-199 Peer reviewed Journal article 2019 ftnorce 2022-10-13T05:50:22Z Atlantic salmon (Salmo salar) smolts are vulnerable to predators during their seaward migration. To determine whether sea trout (Salmo trutta) exhibit a coupled migration to exploit the smolt run, we tracked Atlantic salmon smolts exiting the Vosso River in 2012 (n = 40) and 2013 (n = 50) as well as sea trout tagged in 2012 (n = 40) within an array of acoustic receivers. Spatial survival analysis was used to investigate patterns in smolt mortality, revealing no difference in survival between 2012 and 2013. In both years, losses were greatest in the rivers and their estuaries compared with the inner and outer fjord areas. Sea trout were predominantly detected in the area used by smolts in autumn, after the spring smolt run concluded and coinciding with the spawning migration of sea trout. High rates of smolt mortality merit further investigation to resolve low smolt survival in this region. publishedVersion Article in Journal/Newspaper Atlantic salmon Boreal Environment Research Salmo salar Subarctic NORCE vitenarkiv (Norwegian Research Centre) |
institution |
Open Polar |
collection |
NORCE vitenarkiv (Norwegian Research Centre) |
op_collection_id |
ftnorce |
language |
English |
description |
Atlantic salmon (Salmo salar) smolts are vulnerable to predators during their seaward migration. To determine whether sea trout (Salmo trutta) exhibit a coupled migration to exploit the smolt run, we tracked Atlantic salmon smolts exiting the Vosso River in 2012 (n = 40) and 2013 (n = 50) as well as sea trout tagged in 2012 (n = 40) within an array of acoustic receivers. Spatial survival analysis was used to investigate patterns in smolt mortality, revealing no difference in survival between 2012 and 2013. In both years, losses were greatest in the rivers and their estuaries compared with the inner and outer fjord areas. Sea trout were predominantly detected in the area used by smolts in autumn, after the spring smolt run concluded and coinciding with the spawning migration of sea trout. High rates of smolt mortality merit further investigation to resolve low smolt survival in this region. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Lennox, Robert J. Espedal, Espen Olsen Barlaup, Bjørn Torgeir Mahlum, Shad Kenneth Vollset, Knut |
spellingShingle |
Lennox, Robert J. Espedal, Espen Olsen Barlaup, Bjørn Torgeir Mahlum, Shad Kenneth Vollset, Knut A test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord |
author_facet |
Lennox, Robert J. Espedal, Espen Olsen Barlaup, Bjørn Torgeir Mahlum, Shad Kenneth Vollset, Knut |
author_sort |
Lennox, Robert J. |
title |
A test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord |
title_short |
A test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord |
title_full |
A test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord |
title_fullStr |
A test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord |
title_full_unstemmed |
A test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord |
title_sort |
test of migratory coupling in the salmon-trout predator-prey complex of a subarctic fjord |
publishDate |
2019 |
url |
https://hdl.handle.net/11250/2648098 |
genre |
Atlantic salmon Boreal Environment Research Salmo salar Subarctic |
genre_facet |
Atlantic salmon Boreal Environment Research Salmo salar Subarctic |
op_source |
Boreal environment research 24 189-199 |
op_relation |
Boreal environment research. 2019, 24 189-199. urn:issn:1239-6095 https://hdl.handle.net/11250/2648098 cristin:1767868 |
op_rights |
Copyright 2019 Boreal Environment Research Publishing Board |
_version_ |
1766361269985607680 |