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VMS-based fishing effort and population demographics for the European squid (Loligo vulgaris) off the Portuguese coast

  • CEPHALOPOD BIOLOGY AND EVOLUTION
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Abstract

This study presents a 1-year synopsis of the trawl fishery for the European squid Loligo vulgaris in Portuguese waters, integrating length-structured landings with corresponding geo-referenced fishing activities. From vessel monitoring system (VMS) data, landings and biological sampling, a “status-report” was obtained for 2003. Fishing pressure was found to be most intense in inshore areas of the northwest and the south coasts. Population size structure, classified into three categories, was not uniform throughout the fishing areas. Larger squid are found offshore in the northwest (International Council for the Exploration of the Sea—ICES rectangle 10E0) and in the south (rectangles 2E1 and 3E1), whereas all inshore western coast rectangles showed larger proportions of small squid relative to the southern rectangles. The analysis carried out in this study provides an insight into the possible impact of the fishing intensity pattern on the population structure in various zones. The results demonstrate the benefits of combining geo-referenced fisheries information with landings and size data, to produce explicit spatio-temporal information that can contribute to integrated planning and management for the sustainable exploitation of this resource.

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Acknowledgments

This study was funded by FCT PhD SFRH/BD/43409/2008, MARE 22-05-01-00025 (GeoPesca) and PTDC/BIA-BEC/103266/2008 (MTE) projects. GEoCrust 2.0 was developed initially by the project GeoCrust and subsequently by GeoPesca. This research was partially financed by the “Data Collection for Fisheries Sector Programme” (DCF-EC/DG Maritime Affairs & Fisheries/Joint Research Center). The first author would like to thank three colleagues, namely Melissa Shinn, for the revision of this manuscript. This study was presented to the CIAC 2012 symposium as a poster (“P83 CIAC 2012”) in October 2012.

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Authors and Affiliations

  1. Instituto Português do Mar e da Atmosfera (IPMA), Av. Brasília s/n, 1400-038, Lisbon, Portugal

    Tereza Pilar-Fonseca, João Pereira, Aida Campos, Ana Moreno & Paulo Fonseca

  2. Centro de Investigação Marinha e Ambiental, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal

    Tereza Pilar-Fonseca & Manuel Afonso-Dias

Authors
  1. Tereza Pilar-Fonseca
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  2. João Pereira
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  3. Aida Campos
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  4. Ana Moreno
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  5. Paulo Fonseca
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  6. Manuel Afonso-Dias
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Correspondence to João Pereira.

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Guest editors: Erica A. G. Vidal, Mike Vecchione & Sigurd von Boletzky / Cephalopod Life History, Ecology and Evolution

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Pilar-Fonseca, T., Pereira, J., Campos, A. et al. VMS-based fishing effort and population demographics for the European squid (Loligo vulgaris) off the Portuguese coast. Hydrobiologia 725, 137–144 (2014). https://doi.org/10.1007/s10750-013-1736-x

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  • DOI: https://doi.org/10.1007/s10750-013-1736-x

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