Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna
Abstract The rapid ongoing changes in the Central Arctic Ocean call for baseline information on the pelagic fauna. However, sampling for motile organisms which easily escape vertically towed nets is challenging. Here, we report the species composition and catch weight of pelagic fishes and larger zo...
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ftdoajarticles:oai:doaj.org/article:7e23df9d513341878373d1cc12b41444 2023-05-15T13:22:41+02:00 Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna Randi B. Ingvaldsen Elena Eriksen Harald Gjøsæter Arill Engås Birte Katarina Schuppe Karen M. Assmann Heather Cannaby Padmini Dalpadado Bodil A. Bluhm 2023-01-01T00:00:00Z https://doi.org/10.1038/s41598-023-27957-x https://doaj.org/article/7e23df9d513341878373d1cc12b41444 EN eng Nature Portfolio https://doi.org/10.1038/s41598-023-27957-x https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-27957-x 2045-2322 https://doaj.org/article/7e23df9d513341878373d1cc12b41444 Scientific Reports, Vol 13, Iss 1, Pp 1-15 (2023) Medicine R Science Q article 2023 ftdoajarticles https://doi.org/10.1038/s41598-023-27957-x 2023-01-29T01:31:26Z Abstract The rapid ongoing changes in the Central Arctic Ocean call for baseline information on the pelagic fauna. However, sampling for motile organisms which easily escape vertically towed nets is challenging. Here, we report the species composition and catch weight of pelagic fishes and larger zooplankton from 12 trawl hauls conducted in ice covered waters in the Central Arctic Ocean beyond the continental slopes in late summer. Combined trawl catches with acoustics data revealed low amounts of fish and zooplankton from the advective influenced slope region in the Nansen Basin in the south to the ice-covered deep Amundsen Basin in the north. Both arctic and subarctic-boreal species, including the ones considered as Atlantic expatriate species were found all the way to 87.5o N. We found three fish species (Boreogadus saida, Benthosema glaciale and Reinhardtius hippoglossoides), but the catch was limited to only seven individuals. Euphausiids, amphipods and gelatinous zooplankton dominated the catch weight in the Nansen Basin in the mesopelagic communities. Euphausiids were almost absent in the Amundsen Basin with copepods, amphipods, chaetognaths and gelatinous zooplankton dominating. We postulate asymmetric conditions in the pelagic ecosystems of the western and eastern Eurasian Basin caused by ice and ocean circulation regimes. Article in Journal/Newspaper amundsen basin Arctic Arctic Ocean Boreogadus saida Nansen Basin Subarctic Zooplankton Copepods ice covered waters Directory of Open Access Journals: DOAJ Articles Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) Arctic Arctic Ocean Scientific Reports 13 1 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Medicine R Science Q |
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Medicine R Science Q Randi B. Ingvaldsen Elena Eriksen Harald Gjøsæter Arill Engås Birte Katarina Schuppe Karen M. Assmann Heather Cannaby Padmini Dalpadado Bodil A. Bluhm Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna |
topic_facet |
Medicine R Science Q |
description |
Abstract The rapid ongoing changes in the Central Arctic Ocean call for baseline information on the pelagic fauna. However, sampling for motile organisms which easily escape vertically towed nets is challenging. Here, we report the species composition and catch weight of pelagic fishes and larger zooplankton from 12 trawl hauls conducted in ice covered waters in the Central Arctic Ocean beyond the continental slopes in late summer. Combined trawl catches with acoustics data revealed low amounts of fish and zooplankton from the advective influenced slope region in the Nansen Basin in the south to the ice-covered deep Amundsen Basin in the north. Both arctic and subarctic-boreal species, including the ones considered as Atlantic expatriate species were found all the way to 87.5o N. We found three fish species (Boreogadus saida, Benthosema glaciale and Reinhardtius hippoglossoides), but the catch was limited to only seven individuals. Euphausiids, amphipods and gelatinous zooplankton dominated the catch weight in the Nansen Basin in the mesopelagic communities. Euphausiids were almost absent in the Amundsen Basin with copepods, amphipods, chaetognaths and gelatinous zooplankton dominating. We postulate asymmetric conditions in the pelagic ecosystems of the western and eastern Eurasian Basin caused by ice and ocean circulation regimes. |
format |
Article in Journal/Newspaper |
author |
Randi B. Ingvaldsen Elena Eriksen Harald Gjøsæter Arill Engås Birte Katarina Schuppe Karen M. Assmann Heather Cannaby Padmini Dalpadado Bodil A. Bluhm |
author_facet |
Randi B. Ingvaldsen Elena Eriksen Harald Gjøsæter Arill Engås Birte Katarina Schuppe Karen M. Assmann Heather Cannaby Padmini Dalpadado Bodil A. Bluhm |
author_sort |
Randi B. Ingvaldsen |
title |
Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna |
title_short |
Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna |
title_full |
Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna |
title_fullStr |
Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna |
title_full_unstemmed |
Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna |
title_sort |
under-ice observations by trawls and multi-frequency acoustics in the central arctic ocean reveals abundance and composition of pelagic fauna |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41598-023-27957-x https://doaj.org/article/7e23df9d513341878373d1cc12b41444 |
long_lat |
ENVELOPE(74.000,74.000,87.000,87.000) |
geographic |
Amundsen Basin Arctic Arctic Ocean |
geographic_facet |
Amundsen Basin Arctic Arctic Ocean |
genre |
amundsen basin Arctic Arctic Ocean Boreogadus saida Nansen Basin Subarctic Zooplankton Copepods ice covered waters |
genre_facet |
amundsen basin Arctic Arctic Ocean Boreogadus saida Nansen Basin Subarctic Zooplankton Copepods ice covered waters |
op_source |
Scientific Reports, Vol 13, Iss 1, Pp 1-15 (2023) |
op_relation |
https://doi.org/10.1038/s41598-023-27957-x https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-27957-x 2045-2322 https://doaj.org/article/7e23df9d513341878373d1cc12b41444 |
op_doi |
https://doi.org/10.1038/s41598-023-27957-x |
container_title |
Scientific Reports |
container_volume |
13 |
container_issue |
1 |
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1766366242955853824 |