Climate warming enhances polar cod recruitment, at least transiently
Polar cod (Boreogadus saida) is the dominant forage fish in Arctic seas and the main prey of the ringed seal (Pusa hispida), the beluga (Delphinapterus leucas) and several seabird species. Changes in the abundance of polar cod will have cascading effects on arctic marine ecosystems. We tested the hy...
Published in: | Progress in Oceanography |
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Online Access: | https://hdl.handle.net/10037/12097 https://doi.org/10.1016/j.pocean.2017.06.008 |
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ftunivtroemsoe:oai:munin.uit.no:10037/12097 2023-05-15T14:51:09+02:00 Climate warming enhances polar cod recruitment, at least transiently Bouchard, Caroline Geoffroy, Maxime LeBlanc, Mathieu Majewski, Andrew Gauthier, Stéphane Walkusz, Wojciech Reist, James D. Fortier, Louis 2017-06-27 https://hdl.handle.net/10037/12097 https://doi.org/10.1016/j.pocean.2017.06.008 eng eng Elsevier Progress in Oceanography Bouchard, C., Geoffroy, M., LeBlanc, M., Majewski, A., Gauthier, S., Walkusz, W., . Fortier, L. Climate warming enhances polar cod recruitment, at least transiently. Progress in Oceanography. 2017;156:121-129 FRIDAID 1545775 doi:10.1016/j.pocean.2017.06.008 0079-6611 1873-4472 https://hdl.handle.net/10037/12097 openAccess VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Journal article Tidsskriftartikkel Peer reviewed 2017 ftunivtroemsoe https://doi.org/10.1016/j.pocean.2017.06.008 2021-06-25T17:55:46Z Polar cod (Boreogadus saida) is the dominant forage fish in Arctic seas and the main prey of the ringed seal (Pusa hispida), the beluga (Delphinapterus leucas) and several seabird species. Changes in the abundance of polar cod will have cascading effects on arctic marine ecosystems. We tested the hypothesis that an earlier sea ice breakup and warmer sea surface temperatures (SST) in spring-summer result in the higher recruitment of juvenile polar cod in late summer. The density (number m 2) and biomass (mg m 2) of age-0 polar cod in August and September, estimated by hydroacoustics over 9 years in 9 areas of the Canadian Arctic, were negatively correlated to ice breakup week and positively correlated to SST. The timing of the ice breakup was the main determinant of recruitment, with mean juvenile biomass in September up to 11 times greater for early breakup (late May) than for late breakup (early September). Early ice breakup in spring increased juvenile biomass in August and September by allowing the survival of larvae hatched in winter and spring. Since 1979, ice breakup has occurred earlier by as much as 9.3 days per decade in some areas. We thus forecast a transient increase in polar cod biomass over the first part of the present century. Thereafter, the relaxation of extreme climatic conditions in Arctic seas should harbinger the replacement of the hyper-specialized polar cod by subarctic and boreal forage fish. Article in Journal/Newspaper Arctic Beluga Beluga* Boreogadus saida Delphinapterus leucas polar cod Pusa hispida ringed seal Sea ice Subarctic University of Tromsø: Munin Open Research Archive Arctic Progress in Oceanography 156 121 129 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Bouchard, Caroline Geoffroy, Maxime LeBlanc, Mathieu Majewski, Andrew Gauthier, Stéphane Walkusz, Wojciech Reist, James D. Fortier, Louis Climate warming enhances polar cod recruitment, at least transiently |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
description |
Polar cod (Boreogadus saida) is the dominant forage fish in Arctic seas and the main prey of the ringed seal (Pusa hispida), the beluga (Delphinapterus leucas) and several seabird species. Changes in the abundance of polar cod will have cascading effects on arctic marine ecosystems. We tested the hypothesis that an earlier sea ice breakup and warmer sea surface temperatures (SST) in spring-summer result in the higher recruitment of juvenile polar cod in late summer. The density (number m 2) and biomass (mg m 2) of age-0 polar cod in August and September, estimated by hydroacoustics over 9 years in 9 areas of the Canadian Arctic, were negatively correlated to ice breakup week and positively correlated to SST. The timing of the ice breakup was the main determinant of recruitment, with mean juvenile biomass in September up to 11 times greater for early breakup (late May) than for late breakup (early September). Early ice breakup in spring increased juvenile biomass in August and September by allowing the survival of larvae hatched in winter and spring. Since 1979, ice breakup has occurred earlier by as much as 9.3 days per decade in some areas. We thus forecast a transient increase in polar cod biomass over the first part of the present century. Thereafter, the relaxation of extreme climatic conditions in Arctic seas should harbinger the replacement of the hyper-specialized polar cod by subarctic and boreal forage fish. |
format |
Article in Journal/Newspaper |
author |
Bouchard, Caroline Geoffroy, Maxime LeBlanc, Mathieu Majewski, Andrew Gauthier, Stéphane Walkusz, Wojciech Reist, James D. Fortier, Louis |
author_facet |
Bouchard, Caroline Geoffroy, Maxime LeBlanc, Mathieu Majewski, Andrew Gauthier, Stéphane Walkusz, Wojciech Reist, James D. Fortier, Louis |
author_sort |
Bouchard, Caroline |
title |
Climate warming enhances polar cod recruitment, at least transiently |
title_short |
Climate warming enhances polar cod recruitment, at least transiently |
title_full |
Climate warming enhances polar cod recruitment, at least transiently |
title_fullStr |
Climate warming enhances polar cod recruitment, at least transiently |
title_full_unstemmed |
Climate warming enhances polar cod recruitment, at least transiently |
title_sort |
climate warming enhances polar cod recruitment, at least transiently |
publisher |
Elsevier |
publishDate |
2017 |
url |
https://hdl.handle.net/10037/12097 https://doi.org/10.1016/j.pocean.2017.06.008 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beluga Beluga* Boreogadus saida Delphinapterus leucas polar cod Pusa hispida ringed seal Sea ice Subarctic |
genre_facet |
Arctic Beluga Beluga* Boreogadus saida Delphinapterus leucas polar cod Pusa hispida ringed seal Sea ice Subarctic |
op_relation |
Progress in Oceanography Bouchard, C., Geoffroy, M., LeBlanc, M., Majewski, A., Gauthier, S., Walkusz, W., . Fortier, L. Climate warming enhances polar cod recruitment, at least transiently. Progress in Oceanography. 2017;156:121-129 FRIDAID 1545775 doi:10.1016/j.pocean.2017.06.008 0079-6611 1873-4472 https://hdl.handle.net/10037/12097 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1016/j.pocean.2017.06.008 |
container_title |
Progress in Oceanography |
container_volume |
156 |
container_start_page |
121 |
op_container_end_page |
129 |
_version_ |
1766322214448136192 |