Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western Mediterranean

Publicación online disponible en: http://www.icm.csic.es/scimar/index.php

Detalhes bibliográficos
Autores: Morales-Nin, Beatriz, Massutí, Enric, Deudero, Salud, Reñones, Olga, Lleonart, Jordi
Tipo de documento: artigo
Data de publicação:1999
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/5281
Acesso em linha:http://hdl.handle.net/10261/5281
Access Level:Acceso aberto
Palavra-chave:Coryphaena hippurus
Fishery
FADs
VPA
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spelling Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western MediterraneanMorales-Nin, BeatrizMassutí, EnricDeudero, SaludReñones, OlgaLleonart, JordiCoryphaena hippurusFisheryFADsVPAPublicación online disponible en: http://www.icm.csic.es/scimar/index.phpThe dolphinfish (Coryphaena hippurus) fishery based on the island of Majorca (western Mediterranean) and the population dynamics of the species were studied between 1995 and 1996. Fishing effort, landings and length composition of the catches during the sampling period, as well as the historic catch data series and fleet were analysed. Virtual Population Analysis (VPA), taking as the time unit the week in 1995 and the fortnight in 1996, were also carried out. Dolphinfish is fished from August to December, with main catches in September-October, using anchored fish aggregation devices (FADs) and surrounding net. The mooring areas, placed from 70 to 1200 m depth, are distributed among the boats registered for the year´s fishery. A total of 46 boats took part in this fishery in 1995 and 37 in 1996, with a catch of 128 and 52 metric tons respectively. These wide fluctuations are also shown in the annual catches of the 16year series, which ranged from 2 to more than 120 metric tons, showing a slightly increasing trend (4 tons per year). The comparison of different measures of effort (FADs, days and hours) showed similar values of CPUE, although the number of FADs showed the lowest variation, with normal variances and average values not significantly different between harbours. The length composition of the catches ranged from 20 to 64 cm fork length, which corresponds to juveniles between 2 and 6 months of age. The main results of the VPA, which must be regarded in relative rather than absolute values, showed that the available population and the recruitment in 1995 are greater (around one order of magnitude) than in 1996. For both years, the number of individuals declined in the course of the fishing season, while biomass increased during the first 5 weeks. The fact that the exploited fraction of the dolphinfish population is composed of 0-age class suggests that catch fluctuations might be related to environmental parameters and to the migratory behaviour pattern of the species. These two interrelated factors can produce failures of its annual spawning in the western Mediterranean, and/or of the recruitment of the species to the fishery.This paper is a result of the research projects “Biology and fishery of dolphinfish in the western Mediterranean and Canary Islands area” and “Dolphinfish biological and fishing data in the western Mediterranean”, funded by Directorate General XIV of the European Commission (Refs. 94/031 and 95/73 respectively).Peer reviewedCSIC - Instituto de Ciencias del Mar (ICM)200820081999info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501339782 bytesapplication/pdfhttp://hdl.handle.net/10261/5281reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/52812026-05-22T06:33:51Z
dc.title.none.fl_str_mv Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western Mediterranean
title Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western Mediterranean
spellingShingle Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western Mediterranean
Morales-Nin, Beatriz
Coryphaena hippurus
Fishery
FADs
VPA
title_short Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western Mediterranean
title_full Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western Mediterranean
title_fullStr Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western Mediterranean
title_full_unstemmed Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western Mediterranean
title_sort Population dynamics and fishery of dolphinfish (Coryphaena hippurus) in the western Mediterranean
dc.creator.none.fl_str_mv Morales-Nin, Beatriz
Massutí, Enric
Deudero, Salud
Reñones, Olga
Lleonart, Jordi
author Morales-Nin, Beatriz
author_facet Morales-Nin, Beatriz
Massutí, Enric
Deudero, Salud
Reñones, Olga
Lleonart, Jordi
author_role author
author2 Massutí, Enric
Deudero, Salud
Reñones, Olga
Lleonart, Jordi
author2_role author
author
author
author
dc.subject.none.fl_str_mv Coryphaena hippurus
Fishery
FADs
VPA
topic Coryphaena hippurus
Fishery
FADs
VPA
description Publicación online disponible en: http://www.icm.csic.es/scimar/index.php
publishDate 1999
dc.date.none.fl_str_mv 1999
2008
2008
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/10261/5281
url http://hdl.handle.net/10261/5281
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 339782 bytes
application/pdf
dc.publisher.none.fl_str_mv CSIC - Instituto de Ciencias del Mar (ICM)
publisher.none.fl_str_mv CSIC - Instituto de Ciencias del Mar (ICM)
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 15,812429

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