Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic Expedition (January-February 2000)
Net samples data from the 15th Italian Antarctic Oceanographic Cruise (Jan-Feb 2000) were analysed to obtain a general picture of the summer distribution pattern, abundance and demography of krill in the western Ross Sea (Antarctica). A midwater sampler-trawl (Hamburg Plankton Net) was used to colle...
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ftdoajarticles:oai:doaj.org/article:c05128bb852a48448ebfa06826ee9208 2023-05-15T14:01:48+02:00 Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic Expedition (January-February 2000) Antonello Sala Massimo Azzali Aniello Russo 2002-06-01T00:00:00Z https://doi.org/10.3989/scimar.2002.66n2123 https://doaj.org/article/c05128bb852a48448ebfa06826ee9208 EN eng Consejo Superior de Investigaciones Científicas http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/571 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.2002.66n2123 https://doaj.org/article/c05128bb852a48448ebfa06826ee9208 Scientia Marina, Vol 66, Iss 2, Pp 123-133 (2002) abundance antarctica krill demography distribution euphausia crystallorophias euphausia superba ross sea Aquaculture. Fisheries. Angling SH1-691 article 2002 ftdoajarticles https://doi.org/10.3989/scimar.2002.66n2123 2022-12-31T05:38:31Z Net samples data from the 15th Italian Antarctic Oceanographic Cruise (Jan-Feb 2000) were analysed to obtain a general picture of the summer distribution pattern, abundance and demography of krill in the western Ross Sea (Antarctica). A midwater sampler-trawl (Hamburg Plankton Net) was used to collect zooplankton and fish larvae. Mean relative biomass of Antarctic krill Euphausia superba, in the area north of Continental Shelf, was 9.3 g/1000 m3 of filtered water with a mean density of 10.9 ind./1000 m3. Ice krill Euphausia crystallorophias replaced the Antarctic krill in dominance in the High Antarctic Zone (south of 74°), with a mean relative biomass of 3.0 g/1000 m3 and a mean density of 19.1 ind./1000 m3. The present data have demonstrated that in the Ross Sea the two species of euphausiid inhabited different areas during the summer period. Oceanographic data indicate that both euphausiid species were found in surface waters, Euphausia crystallorophias in proper Ross Sea water, and Euphausia superba in Antarctic Surface Water. The catch data of Euphausia superba were characterised by the complete absence of larval stages, scarce occurrence of juveniles and composed primarily of large adult stages, whereas the overall length frequency distribution of Euphausia crystallorophias was characterised by a first mode of juvenile individuals and a second mode consisting of sub-adults and adults. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Ross Sea Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Ross Sea Scientia Marina 66 2 123 133 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
abundance antarctica krill demography distribution euphausia crystallorophias euphausia superba ross sea Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
abundance antarctica krill demography distribution euphausia crystallorophias euphausia superba ross sea Aquaculture. Fisheries. Angling SH1-691 Antonello Sala Massimo Azzali Aniello Russo Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic Expedition (January-February 2000) |
topic_facet |
abundance antarctica krill demography distribution euphausia crystallorophias euphausia superba ross sea Aquaculture. Fisheries. Angling SH1-691 |
description |
Net samples data from the 15th Italian Antarctic Oceanographic Cruise (Jan-Feb 2000) were analysed to obtain a general picture of the summer distribution pattern, abundance and demography of krill in the western Ross Sea (Antarctica). A midwater sampler-trawl (Hamburg Plankton Net) was used to collect zooplankton and fish larvae. Mean relative biomass of Antarctic krill Euphausia superba, in the area north of Continental Shelf, was 9.3 g/1000 m3 of filtered water with a mean density of 10.9 ind./1000 m3. Ice krill Euphausia crystallorophias replaced the Antarctic krill in dominance in the High Antarctic Zone (south of 74°), with a mean relative biomass of 3.0 g/1000 m3 and a mean density of 19.1 ind./1000 m3. The present data have demonstrated that in the Ross Sea the two species of euphausiid inhabited different areas during the summer period. Oceanographic data indicate that both euphausiid species were found in surface waters, Euphausia crystallorophias in proper Ross Sea water, and Euphausia superba in Antarctic Surface Water. The catch data of Euphausia superba were characterised by the complete absence of larval stages, scarce occurrence of juveniles and composed primarily of large adult stages, whereas the overall length frequency distribution of Euphausia crystallorophias was characterised by a first mode of juvenile individuals and a second mode consisting of sub-adults and adults. |
format |
Article in Journal/Newspaper |
author |
Antonello Sala Massimo Azzali Aniello Russo |
author_facet |
Antonello Sala Massimo Azzali Aniello Russo |
author_sort |
Antonello Sala |
title |
Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic Expedition (January-February 2000) |
title_short |
Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic Expedition (January-February 2000) |
title_full |
Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic Expedition (January-February 2000) |
title_fullStr |
Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic Expedition (January-February 2000) |
title_full_unstemmed |
Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic Expedition (January-February 2000) |
title_sort |
krill of the ross sea: distribution, abundance and demography of euphausia superba and euphausia crystallorophias during the italian antarctic expedition (january-february 2000) |
publisher |
Consejo Superior de Investigaciones Científicas |
publishDate |
2002 |
url |
https://doi.org/10.3989/scimar.2002.66n2123 https://doaj.org/article/c05128bb852a48448ebfa06826ee9208 |
geographic |
Antarctic The Antarctic Ross Sea |
geographic_facet |
Antarctic The Antarctic Ross Sea |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Ross Sea |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Ross Sea |
op_source |
Scientia Marina, Vol 66, Iss 2, Pp 123-133 (2002) |
op_relation |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/571 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.2002.66n2123 https://doaj.org/article/c05128bb852a48448ebfa06826ee9208 |
op_doi |
https://doi.org/10.3989/scimar.2002.66n2123 |
container_title |
Scientia Marina |
container_volume |
66 |
container_issue |
2 |
container_start_page |
123 |
op_container_end_page |
133 |
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1766271837720805376 |