Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015

A stratified random bottom trawl survey on Flemish Cap was carried out from June 21th to July 26th 2015. The area surveyed was extended up to depths of 800 fathoms (1450 meters) following the same procedures as in previous years. This year a total of 181 valid hauls were made by the vessel R/V Vizco...

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Detalhes bibliográficos
Autor: Casas-Sánchez, José Miguel
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/328960
Acesso em linha:http://hdl.handle.net/10261/328960
Access Level:acceso abierto
Palavra-chave:Centro Oceanográfico de Vigo
Pesquerías
Pandalus borealis
UE Research Survey
Flemish Cap
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spelling Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015Casas-Sánchez, José MiguelCentro Oceanográfico de VigoPesqueríasPandalus borealisUE Research SurveyFlemish CapA stratified random bottom trawl survey on Flemish Cap was carried out from June 21th to July 26th 2015. The area surveyed was extended up to depths of 800 fathoms (1450 meters) following the same procedures as in previous years. This year a total of 181 valid hauls were made by the vessel R/V Vizconde de Eza with the usual survey gear (Lofoten), 120 up to 730 meters depth. The surveyed area has properly prospected the 32 strata planned. The general indexes for shrimp were estimated taken into account the traditional swept area (strata 1-19, up to depths of 730 m.) and the total area surveyed (strata 1-34, up to depths of 1450 m.). As the last years the strata 26 and 27sited in the southeast of the bank with depths from 600 to 800 fathoms (1100-1400 m.) will not be surveyed due to the presence in the bottoms of great quantities of mud and sponges. The results concerning shrimp are presented and compared to those from previous years of the same series. The biomass and abundance in 2015 increased significantly since 2014 (70 % and 117% respectively), but remain between the lowest values recorded in the EU survey series. The youngest specimens (age 1) were present in the catch but at very low level, and they were weakly presents in the small mesh size bag attached to the cod-end of the main gear. Although the abundance at age 2 was bigger than previous years and stay now at 2010 level, it does not suggest a change in the absence of any strong year classes since 2003. This poor situation of the shrimp stock is associated, as in previous years with the good condition of the cod stock, which in 2015 recorded biomass value between the biggest in the time series.NONorthwest Atlantic Fisheries Organization (NAFO)202320232015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/328960reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Vigoinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3289602026-05-22T06:33:51Z
dc.title.none.fl_str_mv Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015
title Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015
spellingShingle Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015
Casas-Sánchez, José Miguel
Centro Oceanográfico de Vigo
Pesquerías
Pandalus borealis
UE Research Survey
Flemish Cap
title_short Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015
title_full Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015
title_fullStr Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015
title_full_unstemmed Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015
title_sort Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2015
dc.creator.none.fl_str_mv Casas-Sánchez, José Miguel
author Casas-Sánchez, José Miguel
author_facet Casas-Sánchez, José Miguel
author_role author
dc.contributor.none.fl_str_mv Northwest Atlantic Fisheries Organization (NAFO)
dc.subject.none.fl_str_mv Centro Oceanográfico de Vigo
Pesquerías
Pandalus borealis
UE Research Survey
Flemish Cap
topic Centro Oceanográfico de Vigo
Pesquerías
Pandalus borealis
UE Research Survey
Flemish Cap
description A stratified random bottom trawl survey on Flemish Cap was carried out from June 21th to July 26th 2015. The area surveyed was extended up to depths of 800 fathoms (1450 meters) following the same procedures as in previous years. This year a total of 181 valid hauls were made by the vessel R/V Vizconde de Eza with the usual survey gear (Lofoten), 120 up to 730 meters depth. The surveyed area has properly prospected the 32 strata planned. The general indexes for shrimp were estimated taken into account the traditional swept area (strata 1-19, up to depths of 730 m.) and the total area surveyed (strata 1-34, up to depths of 1450 m.). As the last years the strata 26 and 27sited in the southeast of the bank with depths from 600 to 800 fathoms (1100-1400 m.) will not be surveyed due to the presence in the bottoms of great quantities of mud and sponges. The results concerning shrimp are presented and compared to those from previous years of the same series. The biomass and abundance in 2015 increased significantly since 2014 (70 % and 117% respectively), but remain between the lowest values recorded in the EU survey series. The youngest specimens (age 1) were present in the catch but at very low level, and they were weakly presents in the small mesh size bag attached to the cod-end of the main gear. Although the abundance at age 2 was bigger than previous years and stay now at 2010 level, it does not suggest a change in the absence of any strong year classes since 2003. This poor situation of the shrimp stock is associated, as in previous years with the good condition of the cod stock, which in 2015 recorded biomass value between the biggest in the time series.
publishDate 2015
dc.date.none.fl_str_mv 2015
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/10261/328960
url http://hdl.handle.net/10261/328960
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 15,812429

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