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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ftoslouniv:oai:www.duo.uio.no:10852/80749 2023-05-15T14:27:59+02:00 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, Joel Marcel Langangen, Øystein Gjøsæter, Harald Stige, Leif Christian 2020-08-20T13:24:46Z http://hdl.handle.net/10852/80749 http://urn.nb.no/URN:NBN:no-83837 https://doi.org/10.1093/icesjms/fsaa040 EN eng NFR/276730 http://urn.nb.no/URN:NBN:no-83837 Dupont, Nicolas Durant, Joel Marcel 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. ICES Journal of Marine Science. 2020, 77(5), 1796-1805 http://hdl.handle.net/10852/80749 1824295 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=ICES Journal of Marine Science&rft.volume=77&rft.spage=1796&rft.date=2020 ICES Journal of Marine Science 77 5 1796 1805 https://doi.org/10.1093/icesjms/fsaa040 URN:NBN:no-83837 Fulltext https://www.duo.uio.no/bitstream/handle/10852/80749/2/fsaa040.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 1054-3139 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2020 ftoslouniv https://doi.org/10.1093/icesjms/fsaa040 2020-10-28T23:30:17Z 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 Arctic Barents Sea Boreogadus saida Climate change polar cod Sea ice Zooplankton Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Barents Sea ICES Journal of Marine Science 77 5 1796 1805 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Dupont, Nicolas Durant, Joel Marcel Langangen, Øystein Gjøsæter, Harald Stige, Leif Christian |
spellingShingle |
Dupont, Nicolas Durant, Joel Marcel 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 |
author_facet |
Dupont, Nicolas Durant, Joel Marcel 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 |
publishDate |
2020 |
url |
http://hdl.handle.net/10852/80749 http://urn.nb.no/URN:NBN:no-83837 https://doi.org/10.1093/icesjms/fsaa040 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Arctic Barents Sea Boreogadus saida Climate change polar cod Sea ice Zooplankton |
genre_facet |
Arctic Arctic Barents Sea Boreogadus saida Climate change polar cod Sea ice Zooplankton |
op_source |
1054-3139 |
op_relation |
NFR/276730 http://urn.nb.no/URN:NBN:no-83837 Dupont, Nicolas Durant, Joel Marcel 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. ICES Journal of Marine Science. 2020, 77(5), 1796-1805 http://hdl.handle.net/10852/80749 1824295 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=ICES Journal of Marine Science&rft.volume=77&rft.spage=1796&rft.date=2020 ICES Journal of Marine Science 77 5 1796 1805 https://doi.org/10.1093/icesjms/fsaa040 URN:NBN:no-83837 Fulltext https://www.duo.uio.no/bitstream/handle/10852/80749/2/fsaa040.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
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 |
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1766302101407793152 |