Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?

The implementation of regulatory measures of the Atlantic bluefin tuna Recovery Plan in 2007 has produced changes in the fishing strategy of the bait boat fishery in the Bay of Biscay due to market conditions. To maintain bluefin tuna price and to avoid a market boycott of small specimens, fishermen...

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Detalles Bibliográficos
Autores: Rodriguez-Marin, Enrique, Ruiz, Marta, Pérez-Guerrero, Bernardo, Quelle, Pablo, Luque, P.L., Ortiz-de-Urbina-Gutiérrez, José María
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/326754
Acceso en línea:http://hdl.handle.net/10261/326754
Access Level:acceso abierto
Palabra clave:Pesquerías
Centro Oceanográfico de Santander
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spelling Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?Rodriguez-Marin, EnriqueRuiz, MartaPérez-Guerrero, BernardoQuelle, PabloLuque, P.L.Ortiz-de-Urbina-Gutiérrez, José MaríaPesqueríasCentro Oceanográfico de SantanderThe implementation of regulatory measures of the Atlantic bluefin tuna Recovery Plan in 2007 has produced changes in the fishing strategy of the bait boat fishery in the Bay of Biscay due to market conditions. To maintain bluefin tuna price and to avoid a market boycott of small specimens, fishermen's cooperatives of the main ports redistributed bluefin catches throughout the fishing season by establishing vessel maximum quotas by time period and size of the tuna and by port maximum daily sale quotas. In order to see whether these limitations are affecting catch composition, we analysed its evolution by commercial category and by catch at age from 1985 to the present. Our results showed that the catch at age since the implementation of regulatory measures of the Recovery Plan in 2007 comprised older specimens than in the previous time period. Strong year-class signal from 1994 and 2003 cohorts can be observed in the data series but this last year-class signal does not explain the increasing trend in the abundance of older fish in the last five year catches.202320232013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/326754reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Santanderhttps://www.iccat.int/Documents/CVSP/CV069_2013/n_1/CV069010252.pdfinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3267542026-05-22T06:33:51Z
dc.title.none.fl_str_mv Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?
title Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?
spellingShingle Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?
Rodriguez-Marin, Enrique
Pesquerías
Centro Oceanográfico de Santander
title_short Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?
title_full Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?
title_fullStr Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?
title_full_unstemmed Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?
title_sort Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?
dc.creator.none.fl_str_mv Rodriguez-Marin, Enrique
Ruiz, Marta
Pérez-Guerrero, Bernardo
Quelle, Pablo
Luque, P.L.
Ortiz-de-Urbina-Gutiérrez, José María
author Rodriguez-Marin, Enrique
author_facet Rodriguez-Marin, Enrique
Ruiz, Marta
Pérez-Guerrero, Bernardo
Quelle, Pablo
Luque, P.L.
Ortiz-de-Urbina-Gutiérrez, José María
author_role author
author2 Ruiz, Marta
Pérez-Guerrero, Bernardo
Quelle, Pablo
Luque, P.L.
Ortiz-de-Urbina-Gutiérrez, José María
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Pesquerías
Centro Oceanográfico de Santander
topic Pesquerías
Centro Oceanográfico de Santander
description The implementation of regulatory measures of the Atlantic bluefin tuna Recovery Plan in 2007 has produced changes in the fishing strategy of the bait boat fishery in the Bay of Biscay due to market conditions. To maintain bluefin tuna price and to avoid a market boycott of small specimens, fishermen's cooperatives of the main ports redistributed bluefin catches throughout the fishing season by establishing vessel maximum quotas by time period and size of the tuna and by port maximum daily sale quotas. In order to see whether these limitations are affecting catch composition, we analysed its evolution by commercial category and by catch at age from 1985 to the present. Our results showed that the catch at age since the implementation of regulatory measures of the Recovery Plan in 2007 comprised older specimens than in the previous time period. Strong year-class signal from 1994 and 2003 cohorts can be observed in the data series but this last year-class signal does not explain the increasing trend in the abundance of older fish in the last five year catches.
publishDate 2013
dc.date.none.fl_str_mv 2013
2023
2023
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/10261/326754
url http://hdl.handle.net/10261/326754
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Santander
https://www.iccat.int/Documents/CVSP/CV069_2013/n_1/CV069010252.pdf
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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