Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristics

. A research survey for demersal finfish was completed using bottom trawl fishing gear, following a random stratified sampling design, between 50 and 500 m on shelf areas of Subarea 48.1 (Elephant Island) and Subarea 48.2 (South Orkney Island). An acoustic survey was simultaneously carried out to en...

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Published in:Latin American Journal of Aquatic Research
Main Authors: Arana, Patricio M., Jones, Christopher, Alegría, Nicolás A. A., Sarralde-Vizuete, R. (Roberto), Rolleri, Renzo
Format: Article in Journal/Newspaper
Language:English
Published: Pontificia Universidad Catolica de Valparaiso 2020
Subjects:
Online Access:http://hdl.handle.net/10508/15106
http://lajar.ucv.cl/index.php/rlajar/article/download/vol48-issue2-fulltext-2469/1195
https://doi.org/10.3856/vol48-issue2-fulltext-2469
id ftieo:oai:repositorio.ieo.es:10508/15106
record_format openpolar
spelling ftieo:oai:repositorio.ieo.es:10508/15106 2023-06-11T04:04:15+02:00 Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristics Arana, Patricio M. Jones, Christopher Alegría, Nicolás A. A. Sarralde-Vizuete, R. (Roberto) Rolleri, Renzo 2020 http://hdl.handle.net/10508/15106 http://lajar.ucv.cl/index.php/rlajar/article/download/vol48-issue2-fulltext-2469/1195 https://doi.org/10.3856/vol48-issue2-fulltext-2469 eng eng Pontificia Universidad Catolica de Valparaiso Centro Oceanográfico de Canarias 0718-560X http://lajar.ucv.cl/index.php/rlajar/article/download/vol48-issue2-fulltext-2469/1195 http://hdl.handle.net/10508/15106 doi:10.3856/vol48-issue2-fulltext-2469 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ open access Antarctica finfish relative abundance biological characteristics acoustic environment research article 2020 ftieo https://doi.org/10.3856/vol48-issue2-fulltext-2469 2023-05-02T23:49:31Z . A research survey for demersal finfish was completed using bottom trawl fishing gear, following a random stratified sampling design, between 50 and 500 m on shelf areas of Subarea 48.1 (Elephant Island) and Subarea 48.2 (South Orkney Island). An acoustic survey was simultaneously carried out to enhance knowledge of bathymetry and the distribution of fish and krill in the studied area. The cruise took place between the 6 and 27 January 2018. A total of 36 hauls were carried out, 15 around Elephant Island and 21 around the South Orkney Islands. A total of 37 fish species were caught with a total biomass of 19,112 kg. The main species encountered included Notothenia rossii and Champsocephalus gunnari, with nominal catches weighing 16,204 (85%) and 876 kg (5%), respectively. Other species of fish accounted noticeably for lower amounts (11%), such as Gobionotothen gibberifrons (330 kg), Chaenocephalus aceratus (322 kg), and Pseudochaenichthys georgianus (299 kg). Indicative estimates of standing stock biomass suggested that in this cruise, N. rossii was the most abundant demersal finfish species in the Elephant Island area, followed by C. gunnari. Differently, on the South Orkney Islands shelf, the most abundant species was G. gibberifrons, followed by P. georgianus. The study provides biological data (length frequency distribution, median size, sex ratio, gonad maturity stages, length-weight relationship) on the main species captured during the survey, and the oceanographic characteristics (depth profiles of temperature, salinity, density) obtained with CTD around the South Orkney Islands. Article in Journal/Newspaper Antarc* Antarctic Antarctica Elephant Island Notothenia rossii South Orkney Islands Instituto Español de Oceanografía: e-IEO Antarctic Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Latin American Journal of Aquatic Research 48 2 304 322
institution Open Polar
collection Instituto Español de Oceanografía: e-IEO
op_collection_id ftieo
language English
topic Antarctica
finfish
relative abundance
biological characteristics
acoustic
environment
spellingShingle Antarctica
finfish
relative abundance
biological characteristics
acoustic
environment
Arana, Patricio M.
Jones, Christopher
Alegría, Nicolás A. A.
Sarralde-Vizuete, R. (Roberto)
Rolleri, Renzo
Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristics
topic_facet Antarctica
finfish
relative abundance
biological characteristics
acoustic
environment
description . A research survey for demersal finfish was completed using bottom trawl fishing gear, following a random stratified sampling design, between 50 and 500 m on shelf areas of Subarea 48.1 (Elephant Island) and Subarea 48.2 (South Orkney Island). An acoustic survey was simultaneously carried out to enhance knowledge of bathymetry and the distribution of fish and krill in the studied area. The cruise took place between the 6 and 27 January 2018. A total of 36 hauls were carried out, 15 around Elephant Island and 21 around the South Orkney Islands. A total of 37 fish species were caught with a total biomass of 19,112 kg. The main species encountered included Notothenia rossii and Champsocephalus gunnari, with nominal catches weighing 16,204 (85%) and 876 kg (5%), respectively. Other species of fish accounted noticeably for lower amounts (11%), such as Gobionotothen gibberifrons (330 kg), Chaenocephalus aceratus (322 kg), and Pseudochaenichthys georgianus (299 kg). Indicative estimates of standing stock biomass suggested that in this cruise, N. rossii was the most abundant demersal finfish species in the Elephant Island area, followed by C. gunnari. Differently, on the South Orkney Islands shelf, the most abundant species was G. gibberifrons, followed by P. georgianus. The study provides biological data (length frequency distribution, median size, sex ratio, gonad maturity stages, length-weight relationship) on the main species captured during the survey, and the oceanographic characteristics (depth profiles of temperature, salinity, density) obtained with CTD around the South Orkney Islands.
format Article in Journal/Newspaper
author Arana, Patricio M.
Jones, Christopher
Alegría, Nicolás A. A.
Sarralde-Vizuete, R. (Roberto)
Rolleri, Renzo
author_facet Arana, Patricio M.
Jones, Christopher
Alegría, Nicolás A. A.
Sarralde-Vizuete, R. (Roberto)
Rolleri, Renzo
author_sort Arana, Patricio M.
title Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristics
title_short Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristics
title_full Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristics
title_fullStr Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristics
title_full_unstemmed Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristics
title_sort antarctic demersal finfish around the elephant and the south orkney islands: distribution, abundance and biological characteristics
publisher Pontificia Universidad Catolica de Valparaiso
publishDate 2020
url http://hdl.handle.net/10508/15106
http://lajar.ucv.cl/index.php/rlajar/article/download/vol48-issue2-fulltext-2469/1195
https://doi.org/10.3856/vol48-issue2-fulltext-2469
long_lat ENVELOPE(-55.184,-55.184,-61.085,-61.085)
ENVELOPE(-45.500,-45.500,-60.583,-60.583)
geographic Antarctic
Elephant Island
South Orkney Islands
geographic_facet Antarctic
Elephant Island
South Orkney Islands
genre Antarc*
Antarctic
Antarctica
Elephant Island
Notothenia rossii
South Orkney Islands
genre_facet Antarc*
Antarctic
Antarctica
Elephant Island
Notothenia rossii
South Orkney Islands
op_relation 0718-560X
http://lajar.ucv.cl/index.php/rlajar/article/download/vol48-issue2-fulltext-2469/1195
http://hdl.handle.net/10508/15106
doi:10.3856/vol48-issue2-fulltext-2469
op_rights Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
open access
op_doi https://doi.org/10.3856/vol48-issue2-fulltext-2469
container_title Latin American Journal of Aquatic Research
container_volume 48
container_issue 2
container_start_page 304
op_container_end_page 322
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