Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E)
Regular monitoring is an important component of the successful management of pelagic animals of interest to commercial fisheries. Here we provide a biomass estimate for Antarctic krill ( Euphausia superba ) in the eastern sector of the Commission for the Conservation of Antarctic Marine Living Resou...
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Online Access: | https://doi.org/10.1371/journal.pone.0271078 http://www.ncbi.nlm.nih.gov/pubmed/36001623 http://ecite.utas.edu.au/155001 |
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ftunivtasecite:oai:ecite.utas.edu.au:155001 2023-05-15T13:42:41+02:00 Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E) Cox, MJ Macaulay, G Brasier, MJ Burns, A Johnson, OJ King, R Maschette, D Melvin, J Smith, AJR Weldrick, CK Wotherspoon, S Kawaguchi, S 2022 application/pdf https://doi.org/10.1371/journal.pone.0271078 http://www.ncbi.nlm.nih.gov/pubmed/36001623 http://ecite.utas.edu.au/155001 en eng Public Library of Science http://ecite.utas.edu.au/155001/1/155001 - Two scales of distribution and biomass of Antarctic krill.pdf http://dx.doi.org/10.1371/journal.pone.0271078 Cox, MJ and Macaulay, G and Brasier, MJ and Burns, A and Johnson, OJ and King, R and Maschette, D and Melvin, J and Smith, AJR and Weldrick, CK and Wotherspoon, S and Kawaguchi, S, Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E), PLoS ONE, 17, (8) Article e0271078. ISSN 1932-6203 (2022) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/36001623 http://ecite.utas.edu.au/155001 Agricultural Veterinary and Food Sciences Fisheries sciences Fisheries management Refereed Article PeerReviewed 2022 ftunivtasecite https://doi.org/10.1371/journal.pone.0271078 2023-02-20T23:17:09Z Regular monitoring is an important component of the successful management of pelagic animals of interest to commercial fisheries. Here we provide a biomass estimate for Antarctic krill ( Euphausia superba ) in the eastern sector of the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) Division 58.4.2 (55E to 80E; area = 775,732 km 2 ) using data collected during an acoustic-trawl survey carried out in February and March 2021. Using acoustic data collected in day-time and trawl data, areal biomass density was estimated as 8.3 gm -2 giving a total areal krill biomass of 6.48 million tonnes, with a 28.9% coefficient of variation (CV). The inaccessibility of the East Antarctic makes fisheries-independent surveys of Antarctic krill expensive and time consuming, so we also assessed the efficacy of extrapolating smaller surveys to a wider area. During the large-scale survey a smaller scale survey (centre coordinates -66.28S 63.35E, area = 4,902 km 2 ) was conducted. We examine how representative krill densities from the small-scale (Mawson box) survey were over a latitudinal range by comparing krill densities from the large-scale survey split into latitudinal bands. We found the small scale survey provided a good representation of the statistical distribution of krill densities within its latitudinal band (KS-test, D = 0.048, p -value = 0.98), as well as mean density ( t -test p -value = 0.44), but not outside of the band. We recommend further in situ testing of this approach. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba eCite UTAS (University of Tasmania) Antarctic PLOS ONE 17 8 e0271078 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Agricultural Veterinary and Food Sciences Fisheries sciences Fisheries management |
spellingShingle |
Agricultural Veterinary and Food Sciences Fisheries sciences Fisheries management Cox, MJ Macaulay, G Brasier, MJ Burns, A Johnson, OJ King, R Maschette, D Melvin, J Smith, AJR Weldrick, CK Wotherspoon, S Kawaguchi, S Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E) |
topic_facet |
Agricultural Veterinary and Food Sciences Fisheries sciences Fisheries management |
description |
Regular monitoring is an important component of the successful management of pelagic animals of interest to commercial fisheries. Here we provide a biomass estimate for Antarctic krill ( Euphausia superba ) in the eastern sector of the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) Division 58.4.2 (55E to 80E; area = 775,732 km 2 ) using data collected during an acoustic-trawl survey carried out in February and March 2021. Using acoustic data collected in day-time and trawl data, areal biomass density was estimated as 8.3 gm -2 giving a total areal krill biomass of 6.48 million tonnes, with a 28.9% coefficient of variation (CV). The inaccessibility of the East Antarctic makes fisheries-independent surveys of Antarctic krill expensive and time consuming, so we also assessed the efficacy of extrapolating smaller surveys to a wider area. During the large-scale survey a smaller scale survey (centre coordinates -66.28S 63.35E, area = 4,902 km 2 ) was conducted. We examine how representative krill densities from the small-scale (Mawson box) survey were over a latitudinal range by comparing krill densities from the large-scale survey split into latitudinal bands. We found the small scale survey provided a good representation of the statistical distribution of krill densities within its latitudinal band (KS-test, D = 0.048, p -value = 0.98), as well as mean density ( t -test p -value = 0.44), but not outside of the band. We recommend further in situ testing of this approach. |
format |
Article in Journal/Newspaper |
author |
Cox, MJ Macaulay, G Brasier, MJ Burns, A Johnson, OJ King, R Maschette, D Melvin, J Smith, AJR Weldrick, CK Wotherspoon, S Kawaguchi, S |
author_facet |
Cox, MJ Macaulay, G Brasier, MJ Burns, A Johnson, OJ King, R Maschette, D Melvin, J Smith, AJR Weldrick, CK Wotherspoon, S Kawaguchi, S |
author_sort |
Cox, MJ |
title |
Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E) |
title_short |
Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E) |
title_full |
Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E) |
title_fullStr |
Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E) |
title_full_unstemmed |
Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E) |
title_sort |
two scales of distribution and biomass of antarctic krill ( euphausia superba ) in the eastern sector of the ccamlr division 58.4.2 (55 e to 80 e) |
publisher |
Public Library of Science |
publishDate |
2022 |
url |
https://doi.org/10.1371/journal.pone.0271078 http://www.ncbi.nlm.nih.gov/pubmed/36001623 http://ecite.utas.edu.au/155001 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_relation |
http://ecite.utas.edu.au/155001/1/155001 - Two scales of distribution and biomass of Antarctic krill.pdf http://dx.doi.org/10.1371/journal.pone.0271078 Cox, MJ and Macaulay, G and Brasier, MJ and Burns, A and Johnson, OJ and King, R and Maschette, D and Melvin, J and Smith, AJR and Weldrick, CK and Wotherspoon, S and Kawaguchi, S, Two scales of distribution and biomass of Antarctic krill ( Euphausia superba ) in the eastern sector of the CCAMLR Division 58.4.2 (55 E to 80 E), PLoS ONE, 17, (8) Article e0271078. ISSN 1932-6203 (2022) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/36001623 http://ecite.utas.edu.au/155001 |
op_doi |
https://doi.org/10.1371/journal.pone.0271078 |
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PLOS ONE |
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17 |
container_issue |
8 |
container_start_page |
e0271078 |
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