Sea ice, temperature, and prey effects on annual variations in mean lengths of a key Arctic fish, Boreogadus saida, in the Barents Sea
Abstract Oceanographic conditions in the Arctic are changing, with sea ice cover decreasing and sea temperatures increasing. Our understanding of the effects on marine populations in the area is, however, limited. Here, we focus on the Barents Sea stock of polar cod (Boreogadus saida). Polar cod is...
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Language: | English |
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Oxford University Press (OUP)
2020
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsaa040 http://academic.oup.com/icesjms/article-pdf/77/5/1796/33703904/fsaa040.pdf |
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croxfordunivpr:10.1093/icesjms/fsaa040 2023-12-31T10:03:05+01:00 Sea ice, temperature, and prey effects on annual variations in mean lengths of a key Arctic fish, Boreogadus saida, in the Barents Sea Dupont, Nicolas Durant, Joël M Langangen, Øystein Gjøsæter, Harald Stige, Leif Christian Anderson, Emory Norwegian Research Council RCN Nansen Legacy 2020 http://dx.doi.org/10.1093/icesjms/fsaa040 http://academic.oup.com/icesjms/article-pdf/77/5/1796/33703904/fsaa040.pdf en eng Oxford University Press (OUP) http://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science volume 77, issue 5, page 1796-1805 ISSN 1095-9289 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2020 croxfordunivpr https://doi.org/10.1093/icesjms/fsaa040 2023-12-06T08:48:28Z Abstract Oceanographic conditions in the Arctic are changing, with sea ice cover decreasing and sea temperatures increasing. Our understanding of the effects on marine populations in the area is, however, limited. Here, we focus on the Barents Sea stock of polar cod (Boreogadus saida). Polar cod is a key fish species for the transfer of energy from zooplankton to higher trophic levels in the Arctic food web. We analyse the relationships between 30-year data series on the length-at-age of polar cod cohorts (ages 0–4) and sea surface temperature, sea ice concentration, prey biomasses, predator indices, and length-at-age the previous year using multiple linear regression. Results for several ages showed that high length-at-age is significantly associated with low sea ice concentration and high length-at-age the previous year. Only length-at-age for age 1 shows a positive significant relationship with prey biomass. Our results suggest that retreating sea ice has positive effects on the growth of polar cod in the Barents Sea despite previous observations of a stagnating stock biomass and decreasing stock abundance. Our results contribute to identifying mechanisms by which climate variability affects the polar cod population, with implications for our understanding of how future climate change may affect Arctic ecosystems. Article in Journal/Newspaper Arctic Barents Sea Boreogadus saida Climate change polar cod Sea ice Zooplankton Oxford University Press (via Crossref) ICES Journal of Marine Science 77 5 1796 1805 |
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Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Dupont, Nicolas Durant, Joël M Langangen, Øystein Gjøsæter, Harald Stige, Leif Christian Sea ice, temperature, and prey effects on annual variations in mean lengths of a key Arctic fish, Boreogadus saida, in the Barents Sea |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Oceanographic conditions in the Arctic are changing, with sea ice cover decreasing and sea temperatures increasing. Our understanding of the effects on marine populations in the area is, however, limited. Here, we focus on the Barents Sea stock of polar cod (Boreogadus saida). Polar cod is a key fish species for the transfer of energy from zooplankton to higher trophic levels in the Arctic food web. We analyse the relationships between 30-year data series on the length-at-age of polar cod cohorts (ages 0–4) and sea surface temperature, sea ice concentration, prey biomasses, predator indices, and length-at-age the previous year using multiple linear regression. Results for several ages showed that high length-at-age is significantly associated with low sea ice concentration and high length-at-age the previous year. Only length-at-age for age 1 shows a positive significant relationship with prey biomass. Our results suggest that retreating sea ice has positive effects on the growth of polar cod in the Barents Sea despite previous observations of a stagnating stock biomass and decreasing stock abundance. Our results contribute to identifying mechanisms by which climate variability affects the polar cod population, with implications for our understanding of how future climate change may affect Arctic ecosystems. |
author2 |
Anderson, Emory Norwegian Research Council RCN Nansen Legacy |
format |
Article in Journal/Newspaper |
author |
Dupont, Nicolas Durant, Joël M Langangen, Øystein Gjøsæter, Harald Stige, Leif Christian |
author_facet |
Dupont, Nicolas Durant, Joël M Langangen, Øystein Gjøsæter, Harald Stige, Leif Christian |
author_sort |
Dupont, Nicolas |
title |
Sea ice, temperature, and prey effects on annual variations in mean lengths of a key Arctic fish, Boreogadus saida, in the Barents Sea |
title_short |
Sea ice, temperature, and prey effects on annual variations in mean lengths of a key Arctic fish, Boreogadus saida, in the Barents Sea |
title_full |
Sea ice, temperature, and prey effects on annual variations in mean lengths of a key Arctic fish, Boreogadus saida, in the Barents Sea |
title_fullStr |
Sea ice, temperature, and prey effects on annual variations in mean lengths of a key Arctic fish, Boreogadus saida, in the Barents Sea |
title_full_unstemmed |
Sea ice, temperature, and prey effects on annual variations in mean lengths of a key Arctic fish, Boreogadus saida, in the Barents Sea |
title_sort |
sea ice, temperature, and prey effects on annual variations in mean lengths of a key arctic fish, boreogadus saida, in the barents sea |
publisher |
Oxford University Press (OUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1093/icesjms/fsaa040 http://academic.oup.com/icesjms/article-pdf/77/5/1796/33703904/fsaa040.pdf |
genre |
Arctic Barents Sea Boreogadus saida Climate change polar cod Sea ice Zooplankton |
genre_facet |
Arctic Barents Sea Boreogadus saida Climate change polar cod Sea ice Zooplankton |
op_source |
ICES Journal of Marine Science volume 77, issue 5, page 1796-1805 ISSN 1095-9289 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsaa040 |
container_title |
ICES Journal of Marine Science |
container_volume |
77 |
container_issue |
5 |
container_start_page |
1796 |
op_container_end_page |
1805 |
_version_ |
1786817907086327808 |