Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba
Much of the distribution range of Antarctic krill, Euphausia superba, is covered by permanent or seasonal sea ice. Sea ice extent has been implicated as a major factor affecting reproductive success of krill and krill dispersal, but little is known of the way in which ice cover may influence krill b...
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/fcc6ef37-f48f-48f7-97c2-4ee484caae04 2023-05-15T13:45:52+02:00 Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba Brierley, Andrew Stuart Watkins, JL 2000 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/effects-of-sea-ice-cover-on-the-swarming-behaviour-of-antarctic-krill-euphausia-superba(fcc6ef37-f48f-48f7-97c2-4ee484caae04).html http://www.scopus.com/inward/record.url?scp=0034496541&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Brierley , A S & Watkins , JL 2000 , ' Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba ' , Canadian Journal of Fisheries and Aquatic Sciences , vol. 57 , no. Supplement 3 , pp. 24-30 . BELLINGSHAUSEN SEA ACOUSTIC OBSERVATIONS WEDDELL SEA SOUTH GEORGIA EDGE ZONE VARIABILITY ZOOPLANKTON PATCHINESS MIGRATION ABUNDANCE article 2000 ftunstandrewcris 2021-12-26T14:10:56Z Much of the distribution range of Antarctic krill, Euphausia superba, is covered by permanent or seasonal sea ice. Sea ice extent has been implicated as a major factor affecting reproductive success of krill and krill dispersal, but little is known of the way in which ice cover may influence krill behaviour. This is largely because the under-ice environment is difficult to study. Ship-borne echosounders have, however, detected krill aggregations in midwater in ice-covered regions. We used 120-kHz echograms collected underway during three cruises that crossed ice-covered and adjacent open waters in the Bellingshausen, Weddell, and Scotia seas to compare morphological and next-neighbour characteristics of krill swarms within and without ice cover. No significant differences were detected between the horizontal and vertical extent of swarms or swarm next-neighbour distance in ice-covered or open waters. Distributions of swarm mid-depths did, however, differ significantly between ice-covered and open areas in all three seas, although the direction of difference was not the same in each instance: swarms in the Weddell and Scotia seas were generally shallower under ice than in open water, whereas in the Bellingshausen Sea the opposite prevailed. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Bellingshausen Sea Euphausia superba Sea ice Weddell Sea University of St Andrews: Research Portal Antarctic Bellingshausen Sea Weddell Weddell Sea |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
BELLINGSHAUSEN SEA ACOUSTIC OBSERVATIONS WEDDELL SEA SOUTH GEORGIA EDGE ZONE VARIABILITY ZOOPLANKTON PATCHINESS MIGRATION ABUNDANCE |
spellingShingle |
BELLINGSHAUSEN SEA ACOUSTIC OBSERVATIONS WEDDELL SEA SOUTH GEORGIA EDGE ZONE VARIABILITY ZOOPLANKTON PATCHINESS MIGRATION ABUNDANCE Brierley, Andrew Stuart Watkins, JL Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba |
topic_facet |
BELLINGSHAUSEN SEA ACOUSTIC OBSERVATIONS WEDDELL SEA SOUTH GEORGIA EDGE ZONE VARIABILITY ZOOPLANKTON PATCHINESS MIGRATION ABUNDANCE |
description |
Much of the distribution range of Antarctic krill, Euphausia superba, is covered by permanent or seasonal sea ice. Sea ice extent has been implicated as a major factor affecting reproductive success of krill and krill dispersal, but little is known of the way in which ice cover may influence krill behaviour. This is largely because the under-ice environment is difficult to study. Ship-borne echosounders have, however, detected krill aggregations in midwater in ice-covered regions. We used 120-kHz echograms collected underway during three cruises that crossed ice-covered and adjacent open waters in the Bellingshausen, Weddell, and Scotia seas to compare morphological and next-neighbour characteristics of krill swarms within and without ice cover. No significant differences were detected between the horizontal and vertical extent of swarms or swarm next-neighbour distance in ice-covered or open waters. Distributions of swarm mid-depths did, however, differ significantly between ice-covered and open areas in all three seas, although the direction of difference was not the same in each instance: swarms in the Weddell and Scotia seas were generally shallower under ice than in open water, whereas in the Bellingshausen Sea the opposite prevailed. |
format |
Article in Journal/Newspaper |
author |
Brierley, Andrew Stuart Watkins, JL |
author_facet |
Brierley, Andrew Stuart Watkins, JL |
author_sort |
Brierley, Andrew Stuart |
title |
Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba |
title_short |
Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba |
title_full |
Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba |
title_fullStr |
Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba |
title_full_unstemmed |
Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba |
title_sort |
effects of sea ice cover on the swarming behaviour of antarctic krill, euphausia superba |
publishDate |
2000 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/effects-of-sea-ice-cover-on-the-swarming-behaviour-of-antarctic-krill-euphausia-superba(fcc6ef37-f48f-48f7-97c2-4ee484caae04).html http://www.scopus.com/inward/record.url?scp=0034496541&partnerID=8YFLogxK |
geographic |
Antarctic Bellingshausen Sea Weddell Weddell Sea |
geographic_facet |
Antarctic Bellingshausen Sea Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Krill Bellingshausen Sea Euphausia superba Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Krill Bellingshausen Sea Euphausia superba Sea ice Weddell Sea |
op_source |
Brierley , A S & Watkins , JL 2000 , ' Effects of sea ice cover on the swarming behaviour of Antarctic krill, Euphausia superba ' , Canadian Journal of Fisheries and Aquatic Sciences , vol. 57 , no. Supplement 3 , pp. 24-30 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766231826408407040 |