Revealing the full ocean migration of individual Atlantic salmon
Abstract Background Knowledge of the complete horizontal migration and vertical movements of Atlantic salmon (Salmo salar L.) during the marine phase is important for understanding the link between individual processes and population recruitment. We studied the detailed migration behaviour of six po...
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ftdatacite:10.6084/m9.figshare.c.4006072 2023-05-15T15:04:50+02:00 Revealing the full ocean migration of individual Atlantic salmon Strøm, John Thorstad, Eva Hedger, Richard Rikardsen, Audun 2018 https://dx.doi.org/10.6084/m9.figshare.c.4006072 https://figshare.com/collections/Revealing_the_full_ocean_migration_of_individual_Atlantic_salmon/4006072 unknown Figshare https://dx.doi.org/10.1186/s40317-018-0146-2 CC BY 4.0 https://creativecommons.org/licenses/by/4.0 CC-BY 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences Collection article 2018 ftdatacite https://doi.org/10.6084/m9.figshare.c.4006072 https://doi.org/10.1186/s40317-018-0146-2 2021-11-05T12:55:41Z Abstract Background Knowledge of the complete horizontal migration and vertical movements of Atlantic salmon (Salmo salar L.) during the marine phase is important for understanding the link between individual processes and population recruitment. We studied the detailed migration behaviour of six post-spawned adult Atlantic salmon from a North Norwegian river, during the entire ocean migration, by using high-resolution light-based geolocation archival tags. Results The fish performed long-distance migrations and utilized Arctic areas from the eastern Barents Sea, to areas of Jan Mayen Island, and north to Svalbard. Four of six individuals exhibited a strong fidelity towards Jan Mayen Island, particularly during winter, which may suggest that the ecological conditions in these waters may be important for overwintering. One fish displayed exclusive utilization of the Barents Sea, indicating that growth and survival of some individuals are entirely dependent on these waters. The fish displayed a pelagic behaviour and all individuals spent more than 83% of the time in the uppermost 10 m of the water column. There was a strong seasonal trend in diving intensity, with the number of dives increasing with day length, independent of individuals’ spatial distribution. Diving depth was positively correlated with the depth of the mixed layer. Conclusions The Atlantic salmon displayed large individual variation in horizontal migrations, utilizing different ocean areas north of the Arctic Circle. This means that, despite the overall fidelity towards northern latitudes, individuals from the same population may experience highly different ecological conditions, potentially contributing to within-population variation in growth and survival. The seasonal correlation between diving intensity and day length, and spatial correlation between diving depth and depth of the mixed layer, indicate that the overall depth use of the Atlantic salmon depends on both spatially independent seasonal factors, and dynamic oceanographic conditions that facilitate food aggregations. This is the first study of Atlantic salmon to present detailed information about individuals’ continuous horizontal migration and simultaneous vertical movements during the entire ocean migration, thus providing novel information on how habitat use change throughout the ocean residency. Article in Journal/Newspaper Arctic Atlantic salmon Barents Sea Jan Mayen Jan Mayen Island Salmo salar Svalbard DataCite Metadata Store (German National Library of Science and Technology) Arctic Barents Sea Jan Mayen Svalbard Svalbard ENVELOPE(20.000,20.000,78.000,78.000) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences |
spellingShingle |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences Strøm, John Thorstad, Eva Hedger, Richard Rikardsen, Audun Revealing the full ocean migration of individual Atlantic salmon |
topic_facet |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences |
description |
Abstract Background Knowledge of the complete horizontal migration and vertical movements of Atlantic salmon (Salmo salar L.) during the marine phase is important for understanding the link between individual processes and population recruitment. We studied the detailed migration behaviour of six post-spawned adult Atlantic salmon from a North Norwegian river, during the entire ocean migration, by using high-resolution light-based geolocation archival tags. Results The fish performed long-distance migrations and utilized Arctic areas from the eastern Barents Sea, to areas of Jan Mayen Island, and north to Svalbard. Four of six individuals exhibited a strong fidelity towards Jan Mayen Island, particularly during winter, which may suggest that the ecological conditions in these waters may be important for overwintering. One fish displayed exclusive utilization of the Barents Sea, indicating that growth and survival of some individuals are entirely dependent on these waters. The fish displayed a pelagic behaviour and all individuals spent more than 83% of the time in the uppermost 10 m of the water column. There was a strong seasonal trend in diving intensity, with the number of dives increasing with day length, independent of individuals’ spatial distribution. Diving depth was positively correlated with the depth of the mixed layer. Conclusions The Atlantic salmon displayed large individual variation in horizontal migrations, utilizing different ocean areas north of the Arctic Circle. This means that, despite the overall fidelity towards northern latitudes, individuals from the same population may experience highly different ecological conditions, potentially contributing to within-population variation in growth and survival. The seasonal correlation between diving intensity and day length, and spatial correlation between diving depth and depth of the mixed layer, indicate that the overall depth use of the Atlantic salmon depends on both spatially independent seasonal factors, and dynamic oceanographic conditions that facilitate food aggregations. This is the first study of Atlantic salmon to present detailed information about individuals’ continuous horizontal migration and simultaneous vertical movements during the entire ocean migration, thus providing novel information on how habitat use change throughout the ocean residency. |
format |
Article in Journal/Newspaper |
author |
Strøm, John Thorstad, Eva Hedger, Richard Rikardsen, Audun |
author_facet |
Strøm, John Thorstad, Eva Hedger, Richard Rikardsen, Audun |
author_sort |
Strøm, John |
title |
Revealing the full ocean migration of individual Atlantic salmon |
title_short |
Revealing the full ocean migration of individual Atlantic salmon |
title_full |
Revealing the full ocean migration of individual Atlantic salmon |
title_fullStr |
Revealing the full ocean migration of individual Atlantic salmon |
title_full_unstemmed |
Revealing the full ocean migration of individual Atlantic salmon |
title_sort |
revealing the full ocean migration of individual atlantic salmon |
publisher |
Figshare |
publishDate |
2018 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.4006072 https://figshare.com/collections/Revealing_the_full_ocean_migration_of_individual_Atlantic_salmon/4006072 |
long_lat |
ENVELOPE(20.000,20.000,78.000,78.000) |
geographic |
Arctic Barents Sea Jan Mayen Svalbard Svalbard |
geographic_facet |
Arctic Barents Sea Jan Mayen Svalbard Svalbard |
genre |
Arctic Atlantic salmon Barents Sea Jan Mayen Jan Mayen Island Salmo salar Svalbard |
genre_facet |
Arctic Atlantic salmon Barents Sea Jan Mayen Jan Mayen Island Salmo salar Svalbard |
op_relation |
https://dx.doi.org/10.1186/s40317-018-0146-2 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.4006072 https://doi.org/10.1186/s40317-018-0146-2 |
_version_ |
1766336553586524160 |