Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North Atlantic

The food and feeding of ocean redfish are described from stomach contents of 26381 individuals analyzed on board commercial vessels in the Irminger waters from March to November. Most of the stomachs had been everted (15488). The feeding intensity mean value throughout the period was 7.1%. The feedi...

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Detalles Bibliográficos
Autores: González-Iglesias, María de la Concepción, Bruno, Isabel
Tipo de recurso: artículo
Fecha de publicación:1997
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/328067
Acceso en línea:http://hdl.handle.net/10261/328067
Access Level:acceso abierto
Palabra clave:Centro Oceanográfico de Vigo
Pesquerías
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spelling Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North AtlanticGonzález-Iglesias, María de la ConcepciónBruno, IsabelCentro Oceanográfico de VigoPesqueríasThe food and feeding of ocean redfish are described from stomach contents of 26381 individuals analyzed on board commercial vessels in the Irminger waters from March to November. Most of the stomachs had been everted (15488). The feeding intensity mean value throughout the period was 7.1%. The feeding intensity was higher in the months of least reproductive activity in each sex. The prey spectrum was narrow, the diversity diminishing in autumn and winter. Crustacea dominates the redfish diet in March. Other items show great seasonal variation also as with Mollusca which have an increased presence in summer. Crustacea were more abundant in the diet of smaller individuals, the variety of fishes preyed on increasing with the length. The occurrence of Myctop hidae remains constant throughout the length range although their volume increases with size. A marked presence of offal was observed associated with the period of intense commercial activity: April to June. The offal occurrence and offal volume increased with length, particularly in the individuals larger than 40 cm. The intense fishing activity was observed to have a direct influence on diet composition. The main natural prey were: Copepoda (IRI=1582.5); Eupahusiacea (IRI=1361.9); Mollusca Decapoda (IRI=736.8) and Myctophydae (IRI= 220.3). The comparison between Flemish Cap and Irminger Sea redfish diet populations in the same month show important composition differences. The condition factor by month values (Mean=1.26+-0.12) were less than those obtained in the Flemish Cap population (Mean 1.43+-0.17).202320231997info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/328067reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Vigoinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3280672026-05-22T06:33:51Z
dc.title.none.fl_str_mv Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North Atlantic
title Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North Atlantic
spellingShingle Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North Atlantic
González-Iglesias, María de la Concepción
Centro Oceanográfico de Vigo
Pesquerías
title_short Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North Atlantic
title_full Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North Atlantic
title_fullStr Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North Atlantic
title_full_unstemmed Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North Atlantic
title_sort Food and Feeding of Ocean Redfish (Sebastes mentella Travin) in the North Atlantic
dc.creator.none.fl_str_mv González-Iglesias, María de la Concepción
Bruno, Isabel
author González-Iglesias, María de la Concepción
author_facet González-Iglesias, María de la Concepción
Bruno, Isabel
author_role author
author2 Bruno, Isabel
author2_role author
dc.subject.none.fl_str_mv Centro Oceanográfico de Vigo
Pesquerías
topic Centro Oceanográfico de Vigo
Pesquerías
description The food and feeding of ocean redfish are described from stomach contents of 26381 individuals analyzed on board commercial vessels in the Irminger waters from March to November. Most of the stomachs had been everted (15488). The feeding intensity mean value throughout the period was 7.1%. The feeding intensity was higher in the months of least reproductive activity in each sex. The prey spectrum was narrow, the diversity diminishing in autumn and winter. Crustacea dominates the redfish diet in March. Other items show great seasonal variation also as with Mollusca which have an increased presence in summer. Crustacea were more abundant in the diet of smaller individuals, the variety of fishes preyed on increasing with the length. The occurrence of Myctop hidae remains constant throughout the length range although their volume increases with size. A marked presence of offal was observed associated with the period of intense commercial activity: April to June. The offal occurrence and offal volume increased with length, particularly in the individuals larger than 40 cm. The intense fishing activity was observed to have a direct influence on diet composition. The main natural prey were: Copepoda (IRI=1582.5); Eupahusiacea (IRI=1361.9); Mollusca Decapoda (IRI=736.8) and Myctophydae (IRI= 220.3). The comparison between Flemish Cap and Irminger Sea redfish diet populations in the same month show important composition differences. The condition factor by month values (Mean=1.26+-0.12) were less than those obtained in the Flemish Cap population (Mean 1.43+-0.17).
publishDate 1997
dc.date.none.fl_str_mv 1997
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/10261/328067
url http://hdl.handle.net/10261/328067
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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