Marine migration, thermal habitat use and feeding habits of Arctic charr (Salvelinus alpinus (L. 1758)) in SW Greenland
Climate change is altering northern coastal aquatic habitats, especially in fjords. Data on current ecosystem structure and biodiversity in many northern fjord and coastal ecosystems, especially for Greenland, are lacking. We used acoustic telemetry combined with stable isotope analyses in a southwe...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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2024
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Online Access: | http://dx.doi.org/10.1139/cjfas-2024-0053 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2024-0053 |
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crcansciencepubl:10.1139/cjfas-2024-0053 2024-09-30T14:28:24+00:00 Marine migration, thermal habitat use and feeding habits of Arctic charr (Salvelinus alpinus (L. 1758)) in SW Greenland Davidsen, Jan Grimsrud Grimsrud Eldøy, Sindre Håvarstein Piper, Adam Moccetti, Coralie Brodersen, Jakob Whoriskey, Frederick G. Power, Michael 2024 http://dx.doi.org/10.1139/cjfas-2024-0053 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2024-0053 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-2024-0053 2024-09-19T04:09:49Z Climate change is altering northern coastal aquatic habitats, especially in fjords. Data on current ecosystem structure and biodiversity in many northern fjord and coastal ecosystems, especially for Greenland, are lacking. We used acoustic telemetry combined with stable isotope analyses in a southwest Greenland fjord to investigate marine migrations, marine and freshwater thermal habitat use, and the marine feeding habits of 80 acoustically tagged Arctic charr over one year. During summer, most Arctic charr occupied the inner fjord. Models of Arctic charr thermal habitat use suggested higher experienced water temperatures in the inner compared to outer fjord (estimated 1.59ºC difference) during tagged charr mean 70-day (S.D.=14 days) residencies. During February and March, non-migratory individuals used warmer waters (+ 0.56ºC higher) than fish that ultimately migrated to sea, suggesting that over-wintering habitat use patterns influenced migration tactics. Stable isotope mixing model analysis indicated that Arctic charr fed mainly on capelin, marine gammarids and three-spine sticklebacks. The results provide a contemporary baseline for assessing predictions of potential changes in the ecology of Arctic charr in SW Greenland fjords. Article in Journal/Newspaper Arctic charr Arctic Climate change Greenland Salvelinus alpinus Canadian Science Publishing Arctic Greenland Canadian Journal of Fisheries and Aquatic Sciences |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Climate change is altering northern coastal aquatic habitats, especially in fjords. Data on current ecosystem structure and biodiversity in many northern fjord and coastal ecosystems, especially for Greenland, are lacking. We used acoustic telemetry combined with stable isotope analyses in a southwest Greenland fjord to investigate marine migrations, marine and freshwater thermal habitat use, and the marine feeding habits of 80 acoustically tagged Arctic charr over one year. During summer, most Arctic charr occupied the inner fjord. Models of Arctic charr thermal habitat use suggested higher experienced water temperatures in the inner compared to outer fjord (estimated 1.59ºC difference) during tagged charr mean 70-day (S.D.=14 days) residencies. During February and March, non-migratory individuals used warmer waters (+ 0.56ºC higher) than fish that ultimately migrated to sea, suggesting that over-wintering habitat use patterns influenced migration tactics. Stable isotope mixing model analysis indicated that Arctic charr fed mainly on capelin, marine gammarids and three-spine sticklebacks. The results provide a contemporary baseline for assessing predictions of potential changes in the ecology of Arctic charr in SW Greenland fjords. |
format |
Article in Journal/Newspaper |
author |
Davidsen, Jan Grimsrud Grimsrud Eldøy, Sindre Håvarstein Piper, Adam Moccetti, Coralie Brodersen, Jakob Whoriskey, Frederick G. Power, Michael |
spellingShingle |
Davidsen, Jan Grimsrud Grimsrud Eldøy, Sindre Håvarstein Piper, Adam Moccetti, Coralie Brodersen, Jakob Whoriskey, Frederick G. Power, Michael Marine migration, thermal habitat use and feeding habits of Arctic charr (Salvelinus alpinus (L. 1758)) in SW Greenland |
author_facet |
Davidsen, Jan Grimsrud Grimsrud Eldøy, Sindre Håvarstein Piper, Adam Moccetti, Coralie Brodersen, Jakob Whoriskey, Frederick G. Power, Michael |
author_sort |
Davidsen, Jan Grimsrud Grimsrud |
title |
Marine migration, thermal habitat use and feeding habits of Arctic charr (Salvelinus alpinus (L. 1758)) in SW Greenland |
title_short |
Marine migration, thermal habitat use and feeding habits of Arctic charr (Salvelinus alpinus (L. 1758)) in SW Greenland |
title_full |
Marine migration, thermal habitat use and feeding habits of Arctic charr (Salvelinus alpinus (L. 1758)) in SW Greenland |
title_fullStr |
Marine migration, thermal habitat use and feeding habits of Arctic charr (Salvelinus alpinus (L. 1758)) in SW Greenland |
title_full_unstemmed |
Marine migration, thermal habitat use and feeding habits of Arctic charr (Salvelinus alpinus (L. 1758)) in SW Greenland |
title_sort |
marine migration, thermal habitat use and feeding habits of arctic charr (salvelinus alpinus (l. 1758)) in sw greenland |
publisher |
Canadian Science Publishing |
publishDate |
2024 |
url |
http://dx.doi.org/10.1139/cjfas-2024-0053 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2024-0053 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic charr Arctic Climate change Greenland Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Climate change Greenland Salvelinus alpinus |
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-2024-0053 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
_version_ |
1811634105180225536 |