Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North Atlantic

A total of 21 swordfish, Xiphias gladius, were tagged with pop-up satellite tags in northern and southeastern areas of the North Atlantic Ocean. There were seasonal patterns in the horizontal movements, with fish tagged in the central North Atlantic moving southwards from the end of the year, genera...

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Autores: Abascal, Francisco Javier, Mejuto-García, Jaime, Quintans, Manolo, Ramos-Cartelle, Ana
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/324760
Acceso en línea:http://hdl.handle.net/10261/324760
Access Level:acceso abierto
Palabra clave:Pesquerías
Centro Oceanográfico de Canarias
Swordfish
Tagging
Tracking
PSAT
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spelling Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North AtlanticAbascal, Francisco JavierMejuto-García, JaimeQuintans, ManoloRamos-Cartelle, AnaPesqueríasCentro Oceanográfico de CanariasSwordfishTaggingTrackingPSATA total of 21 swordfish, Xiphias gladius, were tagged with pop-up satellite tags in northern and southeastern areas of the North Atlantic Ocean. There were seasonal patterns in the horizontal movements, with fish tagged in the central North Atlantic moving southwards from the end of the year, generally south of 25◦N, and returning to the temperate foraging grounds, north of 40◦N, in spring. Although movements mainly took place latitudinally, fish tracks showed connectivity between the north central, north western, south eastern and north eastern North Atlantic. Average estimated daily displacements were 24.7±19.5 km day−1, and could average up to ∼100 km day−1 in some months. The longest track recorded totaled more than 10,000 km. Swordfish showed remarkable physiological versatility, inhabiting waters with SSTs ranging from 10.1 to 28.6 ◦C, and subject to environmental temperatures of c. 4 ◦C–28◦ C, with daily ranges frequently over 15 ◦C (mean 9.2 ± 5.7). Fish showed a clear diel pattern in vertical behavior, feeding at 300–600 m deep during daytime and staying in the mixed layer at night. There was a significant relationship between nocturnal depth and moonphase, quarter and sea surface temperature. The results of the present study are in agreement with the current separation between North Atlantic, Mediterranean and South Atlantic stocks, but suggest that the assumption of a single homogeneous stock in the North Atlantic might be overly simplistic. Further tagging studies, with special emphasis in areas and seasons not covered so far and in combination with other techniques, are still needed to elucidate the uncertainties of Atlantic swordfish stock structure.SI202320232015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/324760reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Canariasinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3247602026-05-22T06:33:51Z
dc.title.none.fl_str_mv Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North Atlantic
title Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North Atlantic
spellingShingle Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North Atlantic
Abascal, Francisco Javier
Pesquerías
Centro Oceanográfico de Canarias
Swordfish
Tagging
Tracking
PSAT
title_short Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North Atlantic
title_full Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North Atlantic
title_fullStr Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North Atlantic
title_full_unstemmed Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North Atlantic
title_sort Tracking of the broadbill swordfish, Xiphias gladius, in the central and eastern North Atlantic
dc.creator.none.fl_str_mv Abascal, Francisco Javier
Mejuto-García, Jaime
Quintans, Manolo
Ramos-Cartelle, Ana
author Abascal, Francisco Javier
author_facet Abascal, Francisco Javier
Mejuto-García, Jaime
Quintans, Manolo
Ramos-Cartelle, Ana
author_role author
author2 Mejuto-García, Jaime
Quintans, Manolo
Ramos-Cartelle, Ana
author2_role author
author
author
dc.subject.none.fl_str_mv Pesquerías
Centro Oceanográfico de Canarias
Swordfish
Tagging
Tracking
PSAT
topic Pesquerías
Centro Oceanográfico de Canarias
Swordfish
Tagging
Tracking
PSAT
description A total of 21 swordfish, Xiphias gladius, were tagged with pop-up satellite tags in northern and southeastern areas of the North Atlantic Ocean. There were seasonal patterns in the horizontal movements, with fish tagged in the central North Atlantic moving southwards from the end of the year, generally south of 25◦N, and returning to the temperate foraging grounds, north of 40◦N, in spring. Although movements mainly took place latitudinally, fish tracks showed connectivity between the north central, north western, south eastern and north eastern North Atlantic. Average estimated daily displacements were 24.7±19.5 km day−1, and could average up to ∼100 km day−1 in some months. The longest track recorded totaled more than 10,000 km. Swordfish showed remarkable physiological versatility, inhabiting waters with SSTs ranging from 10.1 to 28.6 ◦C, and subject to environmental temperatures of c. 4 ◦C–28◦ C, with daily ranges frequently over 15 ◦C (mean 9.2 ± 5.7). Fish showed a clear diel pattern in vertical behavior, feeding at 300–600 m deep during daytime and staying in the mixed layer at night. There was a significant relationship between nocturnal depth and moonphase, quarter and sea surface temperature. The results of the present study are in agreement with the current separation between North Atlantic, Mediterranean and South Atlantic stocks, but suggest that the assumption of a single homogeneous stock in the North Atlantic might be overly simplistic. Further tagging studies, with special emphasis in areas and seasons not covered so far and in combination with other techniques, are still needed to elucidate the uncertainties of Atlantic swordfish stock structure.
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
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/324760
url http://hdl.handle.net/10261/324760
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Canarias
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 15,81155

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