Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020
During several surveys covering the north-western and northern Svalbard waters, and the deeper Yermak Plateau north of Svalbard during the period 2012–2020, 291 standardized hauls with a demersal trawl were made. All fishes in the catches were identified to the lowest possible taxonomic level, mostl...
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/3100494 https://doi.org/10.1016/j.pocean.2023.103156 |
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ftimr:oai:imr.brage.unit.no:11250/3100494 2023-12-03T10:17:03+01:00 Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020 Gjøsæter, Harald Ingvaldsen, Randi Brunvær Hallfredsson, Elvar Halldor Johannesen, Edda 2023 application/pdf https://hdl.handle.net/11250/3100494 https://doi.org/10.1016/j.pocean.2023.103156 eng eng urn:issn:0079-6611 https://hdl.handle.net/11250/3100494 https://doi.org/10.1016/j.pocean.2023.103156 cristin:2190919 Progress in Oceanography Peer reviewed Journal article 2023 ftimr https://doi.org/10.1016/j.pocean.2023.103156 2023-11-08T23:47:42Z During several surveys covering the north-western and northern Svalbard waters, and the deeper Yermak Plateau north of Svalbard during the period 2012–2020, 291 standardized hauls with a demersal trawl were made. All fishes in the catches were identified to the lowest possible taxonomic level, mostly to species. In addition to the data generated from the trawl catches, bottom temperature, salinity, and depth were recorded at each trawl station. The eelpouts were the most species rich family, with 15 species, followed by codfishes and sculpins with six species each. The other 13 families were represented with one to four species each. Atlantic cod (Gadus morhua) dominated by weight in the catches, while polar cod (Boreogadus saida) dominated by numbers. In the deeper areas including the Yermak Plateau, Greenland halibut (Reinhardtius hippoglossoides) dominated by weight. Zoogeographically, 23 species were Arctic, 5 were Mainly Arctic, 4 Arctoboreal, 25 Mainly Boreal, 9 Boreal, and 2 Widely Distributed. The Arctic species dominated in the deeper areas (Yermak Plateau and slope > 500 m) and on the shallow eastern shelf, whereas the Mainly Boreal species dominated along the slope and on the western and northern shelves < 500 m. A hierarchical cluster analysis revealed three prominent station clusters consistent with the zoogeographical classifications which reflected the oceanographic conditions, water masses and sea ice. The hierarchical cluster analysis additionally separated the cold-water species into two groups consistent with the bathymetry of the region. Diet studies of Atlantic cod revealed that it mainly fed on hyperiids, and that its preferred food further south, capelin, was not prominent in the diet. publishedVersion Article in Journal/Newspaper Arctic atlantic cod Boreogadus saida Gadus morhua Greenland polar cod Sea ice Svalbard Yermak plateau Institute for Marine Research: Brage IMR Arctic Greenland Svalbard Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Progress in Oceanography 219 103156 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
During several surveys covering the north-western and northern Svalbard waters, and the deeper Yermak Plateau north of Svalbard during the period 2012–2020, 291 standardized hauls with a demersal trawl were made. All fishes in the catches were identified to the lowest possible taxonomic level, mostly to species. In addition to the data generated from the trawl catches, bottom temperature, salinity, and depth were recorded at each trawl station. The eelpouts were the most species rich family, with 15 species, followed by codfishes and sculpins with six species each. The other 13 families were represented with one to four species each. Atlantic cod (Gadus morhua) dominated by weight in the catches, while polar cod (Boreogadus saida) dominated by numbers. In the deeper areas including the Yermak Plateau, Greenland halibut (Reinhardtius hippoglossoides) dominated by weight. Zoogeographically, 23 species were Arctic, 5 were Mainly Arctic, 4 Arctoboreal, 25 Mainly Boreal, 9 Boreal, and 2 Widely Distributed. The Arctic species dominated in the deeper areas (Yermak Plateau and slope > 500 m) and on the shallow eastern shelf, whereas the Mainly Boreal species dominated along the slope and on the western and northern shelves < 500 m. A hierarchical cluster analysis revealed three prominent station clusters consistent with the zoogeographical classifications which reflected the oceanographic conditions, water masses and sea ice. The hierarchical cluster analysis additionally separated the cold-water species into two groups consistent with the bathymetry of the region. Diet studies of Atlantic cod revealed that it mainly fed on hyperiids, and that its preferred food further south, capelin, was not prominent in the diet. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Gjøsæter, Harald Ingvaldsen, Randi Brunvær Hallfredsson, Elvar Halldor Johannesen, Edda |
spellingShingle |
Gjøsæter, Harald Ingvaldsen, Randi Brunvær Hallfredsson, Elvar Halldor Johannesen, Edda Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020 |
author_facet |
Gjøsæter, Harald Ingvaldsen, Randi Brunvær Hallfredsson, Elvar Halldor Johannesen, Edda |
author_sort |
Gjøsæter, Harald |
title |
Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020 |
title_short |
Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020 |
title_full |
Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020 |
title_fullStr |
Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020 |
title_full_unstemmed |
Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020 |
title_sort |
fish assemblages at the yermak plateau and in northern svalbard waters during the period 2012–2020 |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3100494 https://doi.org/10.1016/j.pocean.2023.103156 |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Greenland Svalbard Yermak Plateau |
geographic_facet |
Arctic Greenland Svalbard Yermak Plateau |
genre |
Arctic atlantic cod Boreogadus saida Gadus morhua Greenland polar cod Sea ice Svalbard Yermak plateau |
genre_facet |
Arctic atlantic cod Boreogadus saida Gadus morhua Greenland polar cod Sea ice Svalbard Yermak plateau |
op_source |
Progress in Oceanography |
op_relation |
urn:issn:0079-6611 https://hdl.handle.net/11250/3100494 https://doi.org/10.1016/j.pocean.2023.103156 cristin:2190919 |
op_doi |
https://doi.org/10.1016/j.pocean.2023.103156 |
container_title |
Progress in Oceanography |
container_volume |
219 |
container_start_page |
103156 |
_version_ |
1784264009313157120 |