Spatiotemporal variation in Arctic char (Salvelinus alpinus) foraging ecology along western Hudson Bay, Nunavut, Canada
Climate-induced alterations to Arctic sea ice dynamics are influencing resource availability and distribution, and in turn, restructuring Arctic marine food webs, which can be monitored by studying the foraging ecology of opportunistic predators such as anadromous Arctic char (Salvelinus alpinus). D...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
2024
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Online Access: | http://dx.doi.org/10.1139/cjfas-2024-0032 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2024-0032 |
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crcansciencepubl:10.1139/cjfas-2024-0032 2024-09-15T17:52:57+00:00 Spatiotemporal variation in Arctic char (Salvelinus alpinus) foraging ecology along western Hudson Bay, Nunavut, Canada Faulkner, Connor Wayne Ittinuar, Sonny James Tartak, Clayton Ulujuk L'Herault, Vincent Harris, Les Davoren, Gail Yurkowski, David 2024 http://dx.doi.org/10.1139/cjfas-2024-0032 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2024-0032 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences ISSN 0706-652X 1205-7533 journal-article 2024 crcansciencepubl https://doi.org/10.1139/cjfas-2024-0032 2024-09-05T04:11:13Z Climate-induced alterations to Arctic sea ice dynamics are influencing resource availability and distribution, and in turn, restructuring Arctic marine food webs, which can be monitored by studying the foraging ecology of opportunistic predators such as anadromous Arctic char (Salvelinus alpinus). Despite its subsistence and economic importance, Arctic char foraging ecology across their range, particularly in relation to sea ice dynamics, remains understudied. Here, we investigate the foraging ecology of Arctic char near the communities of Rankin Inlet and Naujaat along western Hudson Bay, using stomach contents, stable isotopes (δ¹³C and δ¹⁵N), and highly branched isoprenoids. Spatiotemporal variation in diet was observed in relation to sea ice dynamics, whereby Arctic char in Rankin Inlet consumed more fish and phytoplankton-based carbon, occupied a higher trophic position, and displayed a similar isotopic niche breadth compared to Naujaat. The plastic foraging ecology observed highlights the species' adaptability to inter-annual variability, although long-term resilience in response to climate-driven changes remains unknown. Article in Journal/Newspaper Arctic Hudson Bay Naujaat Nunavut Phytoplankton Rankin Inlet Salvelinus alpinus Sea ice Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences |
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Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Climate-induced alterations to Arctic sea ice dynamics are influencing resource availability and distribution, and in turn, restructuring Arctic marine food webs, which can be monitored by studying the foraging ecology of opportunistic predators such as anadromous Arctic char (Salvelinus alpinus). Despite its subsistence and economic importance, Arctic char foraging ecology across their range, particularly in relation to sea ice dynamics, remains understudied. Here, we investigate the foraging ecology of Arctic char near the communities of Rankin Inlet and Naujaat along western Hudson Bay, using stomach contents, stable isotopes (δ¹³C and δ¹⁵N), and highly branched isoprenoids. Spatiotemporal variation in diet was observed in relation to sea ice dynamics, whereby Arctic char in Rankin Inlet consumed more fish and phytoplankton-based carbon, occupied a higher trophic position, and displayed a similar isotopic niche breadth compared to Naujaat. The plastic foraging ecology observed highlights the species' adaptability to inter-annual variability, although long-term resilience in response to climate-driven changes remains unknown. |
format |
Article in Journal/Newspaper |
author |
Faulkner, Connor Wayne Ittinuar, Sonny James Tartak, Clayton Ulujuk L'Herault, Vincent Harris, Les Davoren, Gail Yurkowski, David |
spellingShingle |
Faulkner, Connor Wayne Ittinuar, Sonny James Tartak, Clayton Ulujuk L'Herault, Vincent Harris, Les Davoren, Gail Yurkowski, David Spatiotemporal variation in Arctic char (Salvelinus alpinus) foraging ecology along western Hudson Bay, Nunavut, Canada |
author_facet |
Faulkner, Connor Wayne Ittinuar, Sonny James Tartak, Clayton Ulujuk L'Herault, Vincent Harris, Les Davoren, Gail Yurkowski, David |
author_sort |
Faulkner, Connor Wayne |
title |
Spatiotemporal variation in Arctic char (Salvelinus alpinus) foraging ecology along western Hudson Bay, Nunavut, Canada |
title_short |
Spatiotemporal variation in Arctic char (Salvelinus alpinus) foraging ecology along western Hudson Bay, Nunavut, Canada |
title_full |
Spatiotemporal variation in Arctic char (Salvelinus alpinus) foraging ecology along western Hudson Bay, Nunavut, Canada |
title_fullStr |
Spatiotemporal variation in Arctic char (Salvelinus alpinus) foraging ecology along western Hudson Bay, Nunavut, Canada |
title_full_unstemmed |
Spatiotemporal variation in Arctic char (Salvelinus alpinus) foraging ecology along western Hudson Bay, Nunavut, Canada |
title_sort |
spatiotemporal variation in arctic char (salvelinus alpinus) foraging ecology along western hudson bay, nunavut, canada |
publisher |
Canadian Science Publishing |
publishDate |
2024 |
url |
http://dx.doi.org/10.1139/cjfas-2024-0032 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2024-0032 |
genre |
Arctic Hudson Bay Naujaat Nunavut Phytoplankton Rankin Inlet Salvelinus alpinus Sea ice |
genre_facet |
Arctic Hudson Bay Naujaat Nunavut Phytoplankton Rankin Inlet Salvelinus alpinus Sea ice |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2024-0032 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
_version_ |
1810294967307862016 |