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

ABSTRACT 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 ou...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Arana,Patricio M., Jones,Christopher D., Alegría,Nicolás A., Sarralde,Roberto, Rolleri,Renzo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2020
Materias:	Antarctica finfish relative abundance biological characteristics acoustic environment
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000200304
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-560X2020000200304
record_format	dspace
spelling	oai:scielo:S0718-560X20200002003042020-05-25Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristicsArana,Patricio M.Jones,Christopher D.Alegría,Nicolás A.Sarralde,RobertoRolleri,Renzo Antarctica finfish relative abundance biological characteristics acoustic environment ABSTRACT 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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.48 n.2 20202020-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000200304en10.3856/vol48-issue2-fulltext-2469
institution	Scielo Chile
collection	Scielo Chile
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 D. Alegría,Nicolás A. Sarralde,Roberto Rolleri,Renzo Antarctic demersal finfish around the Elephant and the South Orkney islands: distribution, abundance and biological characteristics
description	ABSTRACT 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.
author	Arana,Patricio M. Jones,Christopher D. Alegría,Nicolás A. Sarralde,Roberto Rolleri,Renzo
author_facet	Arana,Patricio M. Jones,Christopher D. Alegría,Nicolás A. Sarralde,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 Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000200304
work_keys_str_mv	AT aranapatriciom antarcticdemersalfinfisharoundtheelephantandthesouthorkneyislandsdistributionabundanceandbiologicalcharacteristics AT joneschristopherd antarcticdemersalfinfisharoundtheelephantandthesouthorkneyislandsdistributionabundanceandbiologicalcharacteristics AT alegrianicolasa antarcticdemersalfinfisharoundtheelephantandthesouthorkneyislandsdistributionabundanceandbiologicalcharacteristics AT sarralderoberto antarcticdemersalfinfisharoundtheelephantandthesouthorkneyislandsdistributionabundanceandbiologicalcharacteristics AT rollerirenzo antarcticdemersalfinfisharoundtheelephantandthesouthorkneyislandsdistributionabundanceandbiologicalcharacteristics
_version_	1714205235102089216

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

Ejemplares similares