Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.

Cory’s shearwater Calonectris diomedea is the main seabird species by-caught by the Spanish longline fleet operating in the western Mediterranean Sea. Identification of the principal factors that determine this by-catch and understanding how they could be controlled is fundamental for improving the...

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Authors: Báez, José Carlos, García-Barcelona, Salvador, Mendoza, M., Ortiz-de-Urbina-Gutiérrez, José María, Real, Raimundo, Macías-López, Ángel David
Format: article
Status:Versión aceptada para publicación
Publication Date:2023
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/326526
Online Access:http://hdl.handle.net/10261/326526
https://doi.org/10.1007/s10531-014-0625-6
Access Level:Open access
Keyword:Pesquerías
Centro Oceanográfico de Málaga
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spelling Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.Báez, José CarlosGarcía-Barcelona, SalvadorMendoza, M.Ortiz-de-Urbina-Gutiérrez, José MaríaReal, RaimundoMacías-López, Ángel DavidPesqueríasCentro Oceanográfico de MálagaCory’s shearwater Calonectris diomedea is the main seabird species by-caught by the Spanish longline fleet operating in the western Mediterranean Sea. Identification of the principal factors that determine this by-catch and understanding how they could be controlled is fundamental for improving the management of fisheries and so carry out a better conservation of Cory’s shearwater populations in the Mediterranean. The aim of this paper was to model the longline by-catch of Mediterranean Cory’s shearwater in the Spanish Mediterranean longline fishery as a function of time of the year, technical characteristics of the fishing operation, and geographical location. We used data recorded by an onboard observer program monitoring commercial longline fisheries. During the 10 years covered in this study, 80 birds were captured in 30 fishing operations out of a total of 2,587 observed fishing sets. We used favourability functions and Random Forest analyses to relate the presence of Cory’s shearwater in the by-catch with the explanatory factors. The most explanatory factor in relation to incidence of by-catch was the geographical location (longitude and fishing over the continental shelf) and then the technical characteristics of the fishing operation (number of hooks and fishing during non-working days). Our conclusion is clear, because seabirds are more likely to approach longline vessels when trawlers are not allowed to operate (i.e. non-working days), activity of longliners should be limited to working days, and closing longliners activity during the month of October could reduce greatly reducing seabird bycatch.20232023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/326526https://doi.org/10.1007/s10531-014-0625-6reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Málagainfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3265262026-05-22T06:33:51Z
dc.title.none.fl_str_mv Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.
title Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.
spellingShingle Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.
Báez, José Carlos
Pesquerías
Centro Oceanográfico de Málaga
title_short Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.
title_full Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.
title_fullStr Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.
title_full_unstemmed Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.
title_sort Cory's shearwater by-catch in the Mediterranean Spanish commercial longline fishery: Implications for management.
dc.creator.none.fl_str_mv Báez, José Carlos
García-Barcelona, Salvador
Mendoza, M.
Ortiz-de-Urbina-Gutiérrez, José María
Real, Raimundo
Macías-López, Ángel David
author Báez, José Carlos
author_facet Báez, José Carlos
García-Barcelona, Salvador
Mendoza, M.
Ortiz-de-Urbina-Gutiérrez, José María
Real, Raimundo
Macías-López, Ángel David
author_role author
author2 García-Barcelona, Salvador
Mendoza, M.
Ortiz-de-Urbina-Gutiérrez, José María
Real, Raimundo
Macías-López, Ángel David
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Pesquerías
Centro Oceanográfico de Málaga
topic Pesquerías
Centro Oceanográfico de Málaga
description Cory’s shearwater Calonectris diomedea is the main seabird species by-caught by the Spanish longline fleet operating in the western Mediterranean Sea. Identification of the principal factors that determine this by-catch and understanding how they could be controlled is fundamental for improving the management of fisheries and so carry out a better conservation of Cory’s shearwater populations in the Mediterranean. The aim of this paper was to model the longline by-catch of Mediterranean Cory’s shearwater in the Spanish Mediterranean longline fishery as a function of time of the year, technical characteristics of the fishing operation, and geographical location. We used data recorded by an onboard observer program monitoring commercial longline fisheries. During the 10 years covered in this study, 80 birds were captured in 30 fishing operations out of a total of 2,587 observed fishing sets. We used favourability functions and Random Forest analyses to relate the presence of Cory’s shearwater in the by-catch with the explanatory factors. The most explanatory factor in relation to incidence of by-catch was the geographical location (longitude and fishing over the continental shelf) and then the technical characteristics of the fishing operation (number of hooks and fishing during non-working days). Our conclusion is clear, because seabirds are more likely to approach longline vessels when trawlers are not allowed to operate (i.e. non-working days), activity of longliners should be limited to working days, and closing longliners activity during the month of October could reduce greatly reducing seabird bycatch.
publishDate 2023
dc.date.none.fl_str_mv 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/10261/326526
https://doi.org/10.1007/s10531-014-0625-6
url http://hdl.handle.net/10261/326526
https://doi.org/10.1007/s10531-014-0625-6
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Málaga
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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