Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna
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...
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Online Access: | https://hdl.handle.net/10037/30111 https://doi.org/10.1038/s41598-023-27957-x |
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ftunivtroemsoe:oai:munin.uit.no:10037/30111 2023-09-05T13:11:43+02:00 Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna Ingvaldsen, Randi Brunvær Eriksen, Elena Gjøsæter, Harald Engås, Arill Schuppe, Birte Katarina Assmann, Karen Cannaby, Heather Anne Dalpadado, Padmini Bluhm, Bodil 2023-01-18 https://hdl.handle.net/10037/30111 https://doi.org/10.1038/s41598-023-27957-x eng eng Springer Nature Scientific Reports Ingvaldsen R, Eriksen E, Gjøsæter H, Engås A, Schuppe BK, Assmann K, Cannaby HA, Dalpadado P, Bluhm B. Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna. Scientific Reports. 2023;13(1) FRIDAID 2113135 doi:10.1038/s41598-023-27957-x 2045-2322 https://hdl.handle.net/10037/30111 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.1038/s41598-023-27957-x 2023-08-23T23:07:11Z 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 Arctic Ocean Boreogadus saida Nansen Basin Subarctic Zooplankton Copepods ice covered waters University of Tromsø: Munin Open Research Archive Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) Arctic Arctic Ocean Scientific Reports 13 1 |
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Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
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 |
Ingvaldsen, Randi Brunvær Eriksen, Elena Gjøsæter, Harald Engås, Arill Schuppe, Birte Katarina Assmann, Karen Cannaby, Heather Anne Dalpadado, Padmini Bluhm, Bodil |
spellingShingle |
Ingvaldsen, Randi Brunvær Eriksen, Elena Gjøsæter, Harald Engås, Arill Schuppe, Birte Katarina Assmann, Karen Cannaby, Heather Anne Dalpadado, Padmini Bluhm, Bodil Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna |
author_facet |
Ingvaldsen, Randi Brunvær Eriksen, Elena Gjøsæter, Harald Engås, Arill Schuppe, Birte Katarina Assmann, Karen Cannaby, Heather Anne Dalpadado, Padmini Bluhm, Bodil |
author_sort |
Ingvaldsen, Randi Brunvær |
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 |
Springer Nature |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/30111 https://doi.org/10.1038/s41598-023-27957-x |
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 Arctic Ocean Boreogadus saida Nansen Basin Subarctic Zooplankton Copepods ice covered waters |
genre_facet |
amundsen basin Arctic Arctic Arctic Ocean Boreogadus saida Nansen Basin Subarctic Zooplankton Copepods ice covered waters |
op_relation |
Scientific Reports Ingvaldsen R, Eriksen E, Gjøsæter H, Engås A, Schuppe BK, Assmann K, Cannaby HA, Dalpadado P, Bluhm B. Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna. Scientific Reports. 2023;13(1) FRIDAID 2113135 doi:10.1038/s41598-023-27957-x 2045-2322 https://hdl.handle.net/10037/30111 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.1038/s41598-023-27957-x |
container_title |
Scientific Reports |
container_volume |
13 |
container_issue |
1 |
_version_ |
1776196858229555200 |