Study of the blue whiting movements around the Bay of Biscay using acoustic methods

During March–April 1994 and 1996 two cruises were carried out around Bay of Biscay in order to study movements of blue whiting using acoustic methods. These cruises consisted in a double coverage of an area from 47°30′N, 7°15′W to 43°30′N, 6°30′W along the French and Spanish continental shelf-break...

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Detalles Bibliográficos
Autores: Carrera, Pablo, Meijide-Cameselle, Manuel, Porteiro-Lago, Carmen, Miquel-Batle, Joan
Tipo de recurso: artículo
Fecha de publicación:2001
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/327869
Acceso en línea:http://hdl.handle.net/10261/327869
Access Level:acceso abierto
Palabra clave:Centro Oceanográfico de Vigo
Pesquerías
Blue whiting
Bay of Biscay
Acoustic methods
Spatial distribution
Migration
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spelling Study of the blue whiting movements around the Bay of Biscay using acoustic methodsCarrera, PabloMeijide-Cameselle, ManuelPorteiro-Lago, CarmenMiquel-Batle, JoanCentro Oceanográfico de VigoPesqueríasBlue whitingBay of BiscayAcoustic methodsSpatial distributionMigrationDuring March–April 1994 and 1996 two cruises were carried out around Bay of Biscay in order to study movements of blue whiting using acoustic methods. These cruises consisted in a double coverage of an area from 47°30′N, 7°15′W to 43°30′N, 6°30′W along the French and Spanish continental shelf-break (200–1000 m isobaths). Changes in spatial structure, abundance estimation, age structure and maturity stages have been analysed in each survey and coverage. Blue whiting is known as an important migratory species in the North Atlantic. By February/March, adult fish are concentrated around Porcupine Bank where they spawn. After this, it is believed that the fish migrate northward. From this study, rapid changes in both number of fish and population structure of blue whiting are clear. In 1994 the age structure was found and the differences in maturity stages together with an increasing in fish abundance from the first to the second leg, could indicate a southward movement after the spawning season from the main spawning ground. Results in 1996 were different from those of 1994. Juvenile fish were predominant and there was an important decrease from the first to the second trip. Nevertheless, it seems most likely that any southward postspawning migration from Porcupine Bank is undertaken by only a few young mature fish, but this migration is sparse compared to that undertaken northward. Due to the absence of adult fish, the abundance of younger fish as well as the lack of significant known spawning grounds, the studied area should be regarded as a nursery area as a result of a juvenile migration or a southward larvae drift. This process could be suggested rather than a postspawning migration.Sí202320232001info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/327869reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Vigohttp://www.sciencedirect.com/science/article/pii/S0165783600002484info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3278692026-05-22T06:33:51Z
dc.title.none.fl_str_mv Study of the blue whiting movements around the Bay of Biscay using acoustic methods
title Study of the blue whiting movements around the Bay of Biscay using acoustic methods
spellingShingle Study of the blue whiting movements around the Bay of Biscay using acoustic methods
Carrera, Pablo
Centro Oceanográfico de Vigo
Pesquerías
Blue whiting
Bay of Biscay
Acoustic methods
Spatial distribution
Migration
title_short Study of the blue whiting movements around the Bay of Biscay using acoustic methods
title_full Study of the blue whiting movements around the Bay of Biscay using acoustic methods
title_fullStr Study of the blue whiting movements around the Bay of Biscay using acoustic methods
title_full_unstemmed Study of the blue whiting movements around the Bay of Biscay using acoustic methods
title_sort Study of the blue whiting movements around the Bay of Biscay using acoustic methods
dc.creator.none.fl_str_mv Carrera, Pablo
Meijide-Cameselle, Manuel
Porteiro-Lago, Carmen
Miquel-Batle, Joan
author Carrera, Pablo
author_facet Carrera, Pablo
Meijide-Cameselle, Manuel
Porteiro-Lago, Carmen
Miquel-Batle, Joan
author_role author
author2 Meijide-Cameselle, Manuel
Porteiro-Lago, Carmen
Miquel-Batle, Joan
author2_role author
author
author
dc.subject.none.fl_str_mv Centro Oceanográfico de Vigo
Pesquerías
Blue whiting
Bay of Biscay
Acoustic methods
Spatial distribution
Migration
topic Centro Oceanográfico de Vigo
Pesquerías
Blue whiting
Bay of Biscay
Acoustic methods
Spatial distribution
Migration
description During March–April 1994 and 1996 two cruises were carried out around Bay of Biscay in order to study movements of blue whiting using acoustic methods. These cruises consisted in a double coverage of an area from 47°30′N, 7°15′W to 43°30′N, 6°30′W along the French and Spanish continental shelf-break (200–1000 m isobaths). Changes in spatial structure, abundance estimation, age structure and maturity stages have been analysed in each survey and coverage. Blue whiting is known as an important migratory species in the North Atlantic. By February/March, adult fish are concentrated around Porcupine Bank where they spawn. After this, it is believed that the fish migrate northward. From this study, rapid changes in both number of fish and population structure of blue whiting are clear. In 1994 the age structure was found and the differences in maturity stages together with an increasing in fish abundance from the first to the second leg, could indicate a southward movement after the spawning season from the main spawning ground. Results in 1996 were different from those of 1994. Juvenile fish were predominant and there was an important decrease from the first to the second trip. Nevertheless, it seems most likely that any southward postspawning migration from Porcupine Bank is undertaken by only a few young mature fish, but this migration is sparse compared to that undertaken northward. Due to the absence of adult fish, the abundance of younger fish as well as the lack of significant known spawning grounds, the studied area should be regarded as a nursery area as a result of a juvenile migration or a southward larvae drift. This process could be suggested rather than a postspawning migration.
publishDate 2001
dc.date.none.fl_str_mv 2001
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/10261/327869
url http://hdl.handle.net/10261/327869
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Vigo
http://www.sciencedirect.com/science/article/pii/S0165783600002484
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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