An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3M

72 páginas, 19 tablas, 17 figuras.-- Scientific Council Meeting

Detalles Bibliográficos
Autores: Ávila de Melo, A., Alpoim, Ricardo, Saborido-Rey, Fran
Tipo de recurso: artículo
Fecha de publicación:2003
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/48485
Acceso en línea:http://hdl.handle.net/10261/48485
Access Level:acceso abierto
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3M
title An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3M
spellingShingle An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3M
Ávila de Melo, A.
title_short An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3M
title_full An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3M
title_fullStr An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3M
title_full_unstemmed An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3M
title_sort An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3M
dc.creator.none.fl_str_mv Ávila de Melo, A.
Alpoim, Ricardo
Saborido-Rey, Fran
author Ávila de Melo, A.
author_facet Ávila de Melo, A.
Alpoim, Ricardo
Saborido-Rey, Fran
author_role author
author2 Alpoim, Ricardo
Saborido-Rey, Fran
author2_role author
author
description 72 páginas, 19 tablas, 17 figuras.-- Scientific Council Meeting
publishDate 2003
dc.date.none.fl_str_mv 2003
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/48485
url http://hdl.handle.net/10261/48485
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv N4863
http://archive.nafo.int/open/sc/2003/scr03-045.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Northwest Atlantic Fisheries Organization
publisher.none.fl_str_mv Northwest Atlantic Fisheries Organization
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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spelling An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division Div. 3MÁvila de Melo, A.Alpoim, RicardoSaborido-Rey, Fran72 páginas, 19 tablas, 17 figuras.-- Scientific Council MeetingThe present assessment evaluates the status of the Div. 3M beaked redfish stock, regarded as a management unit composed of two populations from two very similar species (Sebastes mentella and Sebastes fasciatus). The sum of the absolute length compositions of the 1989-2002 commercial catch with the 1993-2002 by-catch is the Div. 3M redfish catch at length input of this assessment. The VPA assessment used a 1989-2002 catch at age matrix starting at age 4 and having a plus group at age 19. An Extended Survivor Analysis (Shepherd, 1999) was performed using the previous XSA framework. The consistency of the XSA results was checked with a Retrospective Analysis confined to the assessments of the most recent years, 2002-2000. A logistic surplus production model (ASPIC) which does not use the equilibrium assumption (Praguer, 1994 and 1995) was also applied using the 1959-2002 catch coupled with the STATLANT standardised CPUE series (1959-1993) and the age 4 plus EU bottom biomass (1988-2002). The ASPIC results, as regards biomass and fishing mortality trends are comparable to the ones from the XSA but with biomass declining to a lesser extent and increasing at faster rate from 1998 onwards. Either XSA or ASPIC analysis pointed out that the Div. 3M beaked redfish stock experienced a steep decline from the second half of the eighties till 1996. Fishing mortality was kept well above Fmsy over the first half of the assessment period. From 1995 onwards fishing mortality dropped and since 1997 has been kept well below the assumed natural mortality. Despite recent fluctuations biomass and female spawning biomass are generally increasing since 1997 but at slow rates, being still well bellow the levels of the first years of the time series. The stock reproductive potential has increased through the nineties compensating the SSB decline and sustaining a 1998-2002 geo-mean recruitment at age 4 identical to the former years of 1989-1993. The 1998 year-class at age 4, recruiting in 2002, is well above the 1989-2002 geo-mean recruitment (including both 1989 and 1990 above average year-classes). However by-catch mortality continued to act as a buffer on survival of pre recruits and its impact increases with the appearance of good year-classes such as the 1998 and the promising 2000 year-class. Short (2006) and medium term (20012) projections were made with the XSA survivors and recruitment randomly re-sampled, assuming two productivity scenarios: one including all recruitments (observed productivity) and the other excluding the recruitment peaks (low productivity). A single option of fishing mortality was considered, and corresponding to short term catches within an interval defined by the recent level of total catch of 4 000 tons and the actual TAC of 5 000 tons. Such option is given by 40% Fstatuquo. Taking into account the trajectories of the last Mterm projections, further increase of the stock and spawning biomass will continue so far to be dependent on keeping fishing mortality at a low level, below both the assumed natural mortality and 0.1 F . At the present stock size this should correspond to a level of catch not higher than 5 000 tons until the end of the present decade, regardless the recruitment regime that will prevail on the near futureThis assessment is part of a EU research project supported by the European Commission (DG XIV, Program for the collection of data in fisheries sector), IPIMAR, CSIC, IEO and AZTIPeer reviewedNorthwest Atlantic Fisheries Organization201220122003info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/48485reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésN4863http://archive.nafo.int/open/sc/2003/scr03-045.pdfinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/484852026-05-22T06:33:51Z
score 15.81155

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