Morphology of Arctic cod (Boreogadus saida) assessed according to habitat preference and age in the Beaufort Sea
The Arctic cod (Boreogadus saida (Lepechin, 1774)) represents the most widespread and abundant fish in the Arctic and is a critical trophic link in its ecosystems. Like many species endemic to the region, it has lost essential habitat as the extent and thickness of sea ice have declined substantiall...
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Online Access: | https://hdl.handle.net/11250/3124905 https://doi.org/10.1139/as-2022-0043 |
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ftimr:oai:imr.brage.unit.no:11250/3124905 2024-04-28T08:03:47+00:00 Morphology of Arctic cod (Boreogadus saida) assessed according to habitat preference and age in the Beaufort Sea Malizia, Juliano Launay, Marie Bruvold, Ingrid Marie Quintela, Maria Johansen, Torild Reist, James D. Majewski, Andrew R. Roy, Denis 2023 application/pdf https://hdl.handle.net/11250/3124905 https://doi.org/10.1139/as-2022-0043 eng eng Arctic Science. 2023, 9 (4), 825-837. urn:issn:2368-7460 https://hdl.handle.net/11250/3124905 https://doi.org/10.1139/as-2022-0043 cristin:2254596 825-837 9 Arctic Science 4 Peer reviewed Journal article 2023 ftimr https://doi.org/10.1139/as-2022-0043 2024-04-10T00:05:22Z The Arctic cod (Boreogadus saida (Lepechin, 1774)) represents the most widespread and abundant fish in the Arctic and is a critical trophic link in its ecosystems. Like many species endemic to the region, it has lost essential habitat as the extent and thickness of sea ice have declined substantially in recent decades. Extreme warming induced by climate change continues to deteriorate polar marine environments. Thus, understanding how Arctic cod use and partition their habitat/environment is central to their conservation. We assessed Arctic cod functional morphology using traditional (including gill rakers) and geometric morphometrics and explored whether these differed among primarily depth-based habitats and age classes using multivariate techniques. While distinct ecotypes have been proposed, these were not detected in our analyses. Rather, results show similar patterns in external morphology of Arctic cod across habitats and age classes in the Beaufort Sea. However, analysis of gill rakers revealed concurrent habitat- and age-specific changes likely associated with dietary preferences. Findings indicate that although Arctic cod do not specialise in external morphological features in any habitat, important aspects of their internal feeding morphology shift as they grow, likely underpinning important distributional shifts and its critical role in transferring energy in Arctic marine ecosystems. publishedVersion Article in Journal/Newspaper Arctic Arctic cod Arctic Beaufort Sea Boreogadus saida Climate change Sea ice Institute for Marine Research: Brage IMR Arctic Science |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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language |
English |
description |
The Arctic cod (Boreogadus saida (Lepechin, 1774)) represents the most widespread and abundant fish in the Arctic and is a critical trophic link in its ecosystems. Like many species endemic to the region, it has lost essential habitat as the extent and thickness of sea ice have declined substantially in recent decades. Extreme warming induced by climate change continues to deteriorate polar marine environments. Thus, understanding how Arctic cod use and partition their habitat/environment is central to their conservation. We assessed Arctic cod functional morphology using traditional (including gill rakers) and geometric morphometrics and explored whether these differed among primarily depth-based habitats and age classes using multivariate techniques. While distinct ecotypes have been proposed, these were not detected in our analyses. Rather, results show similar patterns in external morphology of Arctic cod across habitats and age classes in the Beaufort Sea. However, analysis of gill rakers revealed concurrent habitat- and age-specific changes likely associated with dietary preferences. Findings indicate that although Arctic cod do not specialise in external morphological features in any habitat, important aspects of their internal feeding morphology shift as they grow, likely underpinning important distributional shifts and its critical role in transferring energy in Arctic marine ecosystems. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Malizia, Juliano Launay, Marie Bruvold, Ingrid Marie Quintela, Maria Johansen, Torild Reist, James D. Majewski, Andrew R. Roy, Denis |
spellingShingle |
Malizia, Juliano Launay, Marie Bruvold, Ingrid Marie Quintela, Maria Johansen, Torild Reist, James D. Majewski, Andrew R. Roy, Denis Morphology of Arctic cod (Boreogadus saida) assessed according to habitat preference and age in the Beaufort Sea |
author_facet |
Malizia, Juliano Launay, Marie Bruvold, Ingrid Marie Quintela, Maria Johansen, Torild Reist, James D. Majewski, Andrew R. Roy, Denis |
author_sort |
Malizia, Juliano |
title |
Morphology of Arctic cod (Boreogadus saida) assessed according to habitat preference and age in the Beaufort Sea |
title_short |
Morphology of Arctic cod (Boreogadus saida) assessed according to habitat preference and age in the Beaufort Sea |
title_full |
Morphology of Arctic cod (Boreogadus saida) assessed according to habitat preference and age in the Beaufort Sea |
title_fullStr |
Morphology of Arctic cod (Boreogadus saida) assessed according to habitat preference and age in the Beaufort Sea |
title_full_unstemmed |
Morphology of Arctic cod (Boreogadus saida) assessed according to habitat preference and age in the Beaufort Sea |
title_sort |
morphology of arctic cod (boreogadus saida) assessed according to habitat preference and age in the beaufort sea |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3124905 https://doi.org/10.1139/as-2022-0043 |
genre |
Arctic Arctic cod Arctic Beaufort Sea Boreogadus saida Climate change Sea ice |
genre_facet |
Arctic Arctic cod Arctic Beaufort Sea Boreogadus saida Climate change Sea ice |
op_source |
825-837 9 Arctic Science 4 |
op_relation |
Arctic Science. 2023, 9 (4), 825-837. urn:issn:2368-7460 https://hdl.handle.net/11250/3124905 https://doi.org/10.1139/as-2022-0043 cristin:2254596 |
op_doi |
https://doi.org/10.1139/as-2022-0043 |
container_title |
Arctic Science |
_version_ |
1797574776974213120 |