Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size Composition

NAFO Commission requested that the Scientific Council review the protocols for survey methodology, to inform the alfonsino assessment. Thus, this document presents an possible acoustic survey plan of the alfonsino population inhabiting Kükenthal Peak, located in the Corner Rise Seamount Chain, follo...

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Detalhes bibliográficos
Autores: Carrera, Pablo, González-Costas, Fernando
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/328116
Acesso em linha:http://hdl.handle.net/10261/328116
Access Level:acceso abierto
Palavra-chave:Centro Oceanográfico de Vigo
Pesquerías
fish
size distribution
biomass
Acoustic surveys
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spelling Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size CompositionCarrera, PabloGonzález-Costas, FernandoCentro Oceanográfico de VigoPesqueríasfishsize distributionbiomassAcoustic surveysNAFO Commission requested that the Scientific Council review the protocols for survey methodology, to inform the alfonsino assessment. Thus, this document presents an possible acoustic survey plan of the alfonsino population inhabiting Kükenthal Peak, located in the Corner Rise Seamount Chain, following the Commission’s request. The main objective of this survey plan will be to estimate the distribution, abundance, biomass and size composition of alfonsino (Beryx splendens) on Kükenthal Peak (NAFO Div. 6G) by conducting a hydroacoustic survey during February. Specific objectives will be: estimate the abundance (in number) and biomass (in weight) of alfonsino in Kükenthal Peak. Estimate the alfonsino size composition, length-weight relationship, sex ratio and sexual maturity characterization by sex. Collection of alfonsino gonad and otolith samples for future studies of maturity and age. And characterize the biological environment and the physical environment (Tº, S ‰,) of the pelagic habitat of this species to produce a map of these variables within the survey area in association with alfonsino abundance estimates. It is advisable for economic reasons to conduct the subject acoustic survey with a commercial vessel. Two strata with different levels of sampling effort are proposed due to the patchy distribution of alfonsino as revealed by the echograms provided by the skipper, and also the major occurrence of the species around the slope of the mountains, with little extension towards deeper water (i.e., no extension towards open waters). The survey design will consist on a systematic parallel transects with random starting point, with two different levels of sampling intensity, allocating the maximum effort in the area that historically contained the bulk of the acoustic and trawl commercial records. Transects will be placed to ensure they are perpendicular to the bathymetry of the survey area. There is some evidence that relates vertical migrations of alfonsino concentrations to the illumination of the sea (by the Sun and the Moon). The acoustic survey will carry during moon rising season in February and only collect acoustic data during the daylight hours (0800-2000 hours). Trawl hauls will be conducted only for fish identification and the collection of alfonsino length distribution and biological data. Therefore, trawl station locations will be selected according to the acoustic records.NO202320232021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/328116reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Vigoinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3281162026-05-22T06:33:51Z
dc.title.none.fl_str_mv Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size Composition
title Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size Composition
spellingShingle Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size Composition
Carrera, Pablo
Centro Oceanográfico de Vigo
Pesquerías
fish
size distribution
biomass
Acoustic surveys
title_short Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size Composition
title_full Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size Composition
title_fullStr Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size Composition
title_full_unstemmed Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size Composition
title_sort Sampling Plan for an Acoustic Survey of Kükenthal Peak (NAFO Division 6G) to Quantify Alfonsino (Beryx splendens) Biomass, Abundance and Size Composition
dc.creator.none.fl_str_mv Carrera, Pablo
González-Costas, Fernando
author Carrera, Pablo
author_facet Carrera, Pablo
González-Costas, Fernando
author_role author
author2 González-Costas, Fernando
author2_role author
dc.subject.none.fl_str_mv Centro Oceanográfico de Vigo
Pesquerías
fish
size distribution
biomass
Acoustic surveys
topic Centro Oceanográfico de Vigo
Pesquerías
fish
size distribution
biomass
Acoustic surveys
description NAFO Commission requested that the Scientific Council review the protocols for survey methodology, to inform the alfonsino assessment. Thus, this document presents an possible acoustic survey plan of the alfonsino population inhabiting Kükenthal Peak, located in the Corner Rise Seamount Chain, following the Commission’s request. The main objective of this survey plan will be to estimate the distribution, abundance, biomass and size composition of alfonsino (Beryx splendens) on Kükenthal Peak (NAFO Div. 6G) by conducting a hydroacoustic survey during February. Specific objectives will be: estimate the abundance (in number) and biomass (in weight) of alfonsino in Kükenthal Peak. Estimate the alfonsino size composition, length-weight relationship, sex ratio and sexual maturity characterization by sex. Collection of alfonsino gonad and otolith samples for future studies of maturity and age. And characterize the biological environment and the physical environment (Tº, S ‰,) of the pelagic habitat of this species to produce a map of these variables within the survey area in association with alfonsino abundance estimates. It is advisable for economic reasons to conduct the subject acoustic survey with a commercial vessel. Two strata with different levels of sampling effort are proposed due to the patchy distribution of alfonsino as revealed by the echograms provided by the skipper, and also the major occurrence of the species around the slope of the mountains, with little extension towards deeper water (i.e., no extension towards open waters). The survey design will consist on a systematic parallel transects with random starting point, with two different levels of sampling intensity, allocating the maximum effort in the area that historically contained the bulk of the acoustic and trawl commercial records. Transects will be placed to ensure they are perpendicular to the bathymetry of the survey area. There is some evidence that relates vertical migrations of alfonsino concentrations to the illumination of the sea (by the Sun and the Moon). The acoustic survey will carry during moon rising season in February and only collect acoustic data during the daylight hours (0800-2000 hours). Trawl hauls will be conducted only for fish identification and the collection of alfonsino length distribution and biological data. Therefore, trawl station locations will be selected according to the acoustic records.
publishDate 2021
dc.date.none.fl_str_mv 2021
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/328116
url http://hdl.handle.net/10261/328116
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Vigo
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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