Stable oxygen isotope reconstruction of temperature exposure of the Icelandic cod (Gadus morhua) stock over the last 100 years
Increasing water temperatures are predicted around the globe, with high amplitudes of warming in Subarctic and Arctic regions where Atlantic cod (Gadus morhua) populations currently flourish. We reconstructed oxygen isotope and temperature chronologies from Icelandic cod otoliths, one of the largest...
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Oxford University Press
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Online Access: | https://hdl.handle.net/11250/2766477 https://doi.org/10.1093/icesjms/fsaa011 |
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ftunivbergen:oai:bora.uib.no:11250/2766477 2023-05-15T15:06:42+02:00 Stable oxygen isotope reconstruction of temperature exposure of the Icelandic cod (Gadus morhua) stock over the last 100 years Von Leesen, Gotje Ninnemann, Ulysses S Campana, Steven E. 2020 application/pdf https://hdl.handle.net/11250/2766477 https://doi.org/10.1093/icesjms/fsaa011 eng eng Oxford University Press Norges forskningsråd: 245907 urn:issn:1054-3139 https://hdl.handle.net/11250/2766477 https://doi.org/10.1093/icesjms/fsaa011 cristin:1846427 ICES Journal of Marine Science. 2020, 77 (3), 942-952. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright International Council for the Exploration of the Sea 2020 ICES Journal of Marine Science 942-952 77 3 Journal article Peer reviewed 2020 ftunivbergen https://doi.org/10.1093/icesjms/fsaa011 2023-03-14T17:44:42Z Increasing water temperatures are predicted around the globe, with high amplitudes of warming in Subarctic and Arctic regions where Atlantic cod (Gadus morhua) populations currently flourish. We reconstructed oxygen isotope and temperature chronologies from Icelandic cod otoliths, one of the largest cod stocks in the world, to determine if cod moved or migrated over the last 100 years to avoid increasing water temperatures. For δ18Ootolith analysis, individual annual growth increments from immature and mature life history stages were micromilled from adult otoliths, which were collected in southern Iceland. Linear mixed-effect models confirmed that stable oxygen isotope time series of immature and mature cod differ significantly between both life stages (p < 0.001). Overall, cod otolith δ18O was significantly correlated with water temperature (sea surface temperature: p < 0.001, temperature at 200 m depth: p < 0.01), indicating that Atlantic cod were exposed to fluctuating water temperatures during the past 100 years and did not move as a response to increasing ocean temperatures. All of the alternate physical factors that were considered for the isotope-based variation in the temperature exposure of Icelandic cod were rejected. publishedVersion Article in Journal/Newspaper Arctic atlantic cod Gadus morhua Iceland Subarctic University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic ICES Journal of Marine Science 77 3 942 952 |
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Open Polar |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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ftunivbergen |
language |
English |
description |
Increasing water temperatures are predicted around the globe, with high amplitudes of warming in Subarctic and Arctic regions where Atlantic cod (Gadus morhua) populations currently flourish. We reconstructed oxygen isotope and temperature chronologies from Icelandic cod otoliths, one of the largest cod stocks in the world, to determine if cod moved or migrated over the last 100 years to avoid increasing water temperatures. For δ18Ootolith analysis, individual annual growth increments from immature and mature life history stages were micromilled from adult otoliths, which were collected in southern Iceland. Linear mixed-effect models confirmed that stable oxygen isotope time series of immature and mature cod differ significantly between both life stages (p < 0.001). Overall, cod otolith δ18O was significantly correlated with water temperature (sea surface temperature: p < 0.001, temperature at 200 m depth: p < 0.01), indicating that Atlantic cod were exposed to fluctuating water temperatures during the past 100 years and did not move as a response to increasing ocean temperatures. All of the alternate physical factors that were considered for the isotope-based variation in the temperature exposure of Icelandic cod were rejected. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Von Leesen, Gotje Ninnemann, Ulysses S Campana, Steven E. |
spellingShingle |
Von Leesen, Gotje Ninnemann, Ulysses S Campana, Steven E. Stable oxygen isotope reconstruction of temperature exposure of the Icelandic cod (Gadus morhua) stock over the last 100 years |
author_facet |
Von Leesen, Gotje Ninnemann, Ulysses S Campana, Steven E. |
author_sort |
Von Leesen, Gotje |
title |
Stable oxygen isotope reconstruction of temperature exposure of the Icelandic cod (Gadus morhua) stock over the last 100 years |
title_short |
Stable oxygen isotope reconstruction of temperature exposure of the Icelandic cod (Gadus morhua) stock over the last 100 years |
title_full |
Stable oxygen isotope reconstruction of temperature exposure of the Icelandic cod (Gadus morhua) stock over the last 100 years |
title_fullStr |
Stable oxygen isotope reconstruction of temperature exposure of the Icelandic cod (Gadus morhua) stock over the last 100 years |
title_full_unstemmed |
Stable oxygen isotope reconstruction of temperature exposure of the Icelandic cod (Gadus morhua) stock over the last 100 years |
title_sort |
stable oxygen isotope reconstruction of temperature exposure of the icelandic cod (gadus morhua) stock over the last 100 years |
publisher |
Oxford University Press |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2766477 https://doi.org/10.1093/icesjms/fsaa011 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic atlantic cod Gadus morhua Iceland Subarctic |
genre_facet |
Arctic atlantic cod Gadus morhua Iceland Subarctic |
op_source |
ICES Journal of Marine Science 942-952 77 3 |
op_relation |
Norges forskningsråd: 245907 urn:issn:1054-3139 https://hdl.handle.net/11250/2766477 https://doi.org/10.1093/icesjms/fsaa011 cristin:1846427 ICES Journal of Marine Science. 2020, 77 (3), 942-952. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright International Council for the Exploration of the Sea 2020 |
op_doi |
https://doi.org/10.1093/icesjms/fsaa011 |
container_title |
ICES Journal of Marine Science |
container_volume |
77 |
container_issue |
3 |
container_start_page |
942 |
op_container_end_page |
952 |
_version_ |
1766338260207927296 |