Otolith‐inferred patterns of marine migration frequency in Nunavik Arctic charr
Abstract Alternative migratory tactics in salmonids reflect the large observed interindividual variation in spatial behaviour which may range from strict freshwater residency to uninterrupted anadromy. In Salvelinus , sea migrations are performed during the ice‐free period as freshwater overwinterin...
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crwiley:10.1111/jfb.15491 2024-09-15T17:52:21+00:00 Otolith‐inferred patterns of marine migration frequency in Nunavik Arctic charr Mainguy, Julien Arsenault, Ariel Tran, Lilian Martyniuk, Mackenzie A. C. Paquet, Catherine Moore, Jean‐Sébastien Power, Michael 2023 http://dx.doi.org/10.1111/jfb.15491 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.15491 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 103, issue 5, page 884-896 ISSN 0022-1112 1095-8649 journal-article 2023 crwiley https://doi.org/10.1111/jfb.15491 2024-08-01T04:18:34Z Abstract Alternative migratory tactics in salmonids reflect the large observed interindividual variation in spatial behaviour which may range from strict freshwater residency to uninterrupted anadromy. In Salvelinus , sea migrations are performed during the ice‐free period as freshwater overwintering is thought to be obligatory due to physiological constraints. As a result, individuals can either migrate the next spring or remain in freshwater, as anadromy is generally considered facultative. In Arctic charr ( Salvelinus alpinus ), skipped migrations are known to occur, but limited data are available regarding their frequencies within and among populations. Here, the authors used an otolith microchemistry approach relying on strontium ( 88 Sr) to infer movements between freshwater and marine habitats, and annual oscillations in zinc ( 64 Zn) to help with age identification. They determined the age‐at‐first‐migration and the occurrence of subsequent annual migrations in two Nunavik Arctic charr populations sampled in Deception Bay (Salluit) and river systems linked to Hopes Advance Bay (Aupaluk), northern Québec, Canada. The mode for age‐at‐first‐migration was 4+ for both populations, although it exhibited large variation (range: 0+ to 8+). Skipped migrations constituted a rare event, as 97.7% and 95.6% of the examined Arctic charr at Salluit ( n = 43, mean age = 10.3 ± 2.0 years) and Aupaluk ( n = 45, mean age = 6.0 ± 1.9 years), respectively, were found to have performed uninterrupted annual migrations after initiation of the behaviour. The consistency of the annual migrations suggests that the tactic is sufficiently fitness rewarding to be maintained under current environmental conditions. From a fisheries management perspective, these repeated migrations combined with low site fidelity in this species may lead to large interannual variations in abundance at the local scale, which may represent a challenge for monitoring Arctic charr demographics on a river‐by‐river basis. Article in Journal/Newspaper Arctic charr Salluit Salvelinus alpinus Nunavik Wiley Online Library Journal of Fish Biology 103 5 884 896 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Alternative migratory tactics in salmonids reflect the large observed interindividual variation in spatial behaviour which may range from strict freshwater residency to uninterrupted anadromy. In Salvelinus , sea migrations are performed during the ice‐free period as freshwater overwintering is thought to be obligatory due to physiological constraints. As a result, individuals can either migrate the next spring or remain in freshwater, as anadromy is generally considered facultative. In Arctic charr ( Salvelinus alpinus ), skipped migrations are known to occur, but limited data are available regarding their frequencies within and among populations. Here, the authors used an otolith microchemistry approach relying on strontium ( 88 Sr) to infer movements between freshwater and marine habitats, and annual oscillations in zinc ( 64 Zn) to help with age identification. They determined the age‐at‐first‐migration and the occurrence of subsequent annual migrations in two Nunavik Arctic charr populations sampled in Deception Bay (Salluit) and river systems linked to Hopes Advance Bay (Aupaluk), northern Québec, Canada. The mode for age‐at‐first‐migration was 4+ for both populations, although it exhibited large variation (range: 0+ to 8+). Skipped migrations constituted a rare event, as 97.7% and 95.6% of the examined Arctic charr at Salluit ( n = 43, mean age = 10.3 ± 2.0 years) and Aupaluk ( n = 45, mean age = 6.0 ± 1.9 years), respectively, were found to have performed uninterrupted annual migrations after initiation of the behaviour. The consistency of the annual migrations suggests that the tactic is sufficiently fitness rewarding to be maintained under current environmental conditions. From a fisheries management perspective, these repeated migrations combined with low site fidelity in this species may lead to large interannual variations in abundance at the local scale, which may represent a challenge for monitoring Arctic charr demographics on a river‐by‐river basis. |
format |
Article in Journal/Newspaper |
author |
Mainguy, Julien Arsenault, Ariel Tran, Lilian Martyniuk, Mackenzie A. C. Paquet, Catherine Moore, Jean‐Sébastien Power, Michael |
spellingShingle |
Mainguy, Julien Arsenault, Ariel Tran, Lilian Martyniuk, Mackenzie A. C. Paquet, Catherine Moore, Jean‐Sébastien Power, Michael Otolith‐inferred patterns of marine migration frequency in Nunavik Arctic charr |
author_facet |
Mainguy, Julien Arsenault, Ariel Tran, Lilian Martyniuk, Mackenzie A. C. Paquet, Catherine Moore, Jean‐Sébastien Power, Michael |
author_sort |
Mainguy, Julien |
title |
Otolith‐inferred patterns of marine migration frequency in Nunavik Arctic charr |
title_short |
Otolith‐inferred patterns of marine migration frequency in Nunavik Arctic charr |
title_full |
Otolith‐inferred patterns of marine migration frequency in Nunavik Arctic charr |
title_fullStr |
Otolith‐inferred patterns of marine migration frequency in Nunavik Arctic charr |
title_full_unstemmed |
Otolith‐inferred patterns of marine migration frequency in Nunavik Arctic charr |
title_sort |
otolith‐inferred patterns of marine migration frequency in nunavik arctic charr |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/jfb.15491 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.15491 |
genre |
Arctic charr Salluit Salvelinus alpinus Nunavik |
genre_facet |
Arctic charr Salluit Salvelinus alpinus Nunavik |
op_source |
Journal of Fish Biology volume 103, issue 5, page 884-896 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jfb.15491 |
container_title |
Journal of Fish Biology |
container_volume |
103 |
container_issue |
5 |
container_start_page |
884 |
op_container_end_page |
896 |
_version_ |
1810294394663731200 |