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Ambio

, Volume 46, Issue 1, pp 88–97 | Cite as

Adaptive responses of tropical tuna purse-seiners under temporal regulations

  • Edgar Torres-Irineo
  • Michel Dreyfus-León
  • Daniel Gaertner
  • Silvia Salas
  • Paul Marchal
Report

Abstract

The failure to achieve fisheries management objectives has been broadly discussed in international meetings. Measuring the effects of fishery regulations is difficult due to the lack of detailed information. The yellowfin tuna fishery in the eastern Pacific Ocean offers an opportunity to evaluate the fishers’ responses to temporal regulations. We used data from observers on-board Mexican purse-seine fleet, which is the main fleet fishing on dolphin-associated tuna schools. In 2002, the Inter-American Tropical Tuna Commission implemented a closed season to reduce fishing effort for this fishery. For the period 1992–2008, we analysed three fishery indicators using generalized estimating equations to evaluate the fishers’ response to the closure. We found that purse-seiners decreased their time spent in port, increased their fishing sets, and maintained their proportion of successful fishing sets. Our results highlight the relevance of accounting for the fisher behaviour to understand fisheries dynamics when establishing management regulations.

Keywords

Closed season Eastern tropical Pacific Fisher behaviour Purse-seine fishing Tropical tuna 

Notes

Acknowledgments

We thank anonymous referees for suggestions that helped to improve the paper. The fisheries data analysed in this publication were collected by the Programa Nacional de Aprovechamiento del Atún y de Protección de Delfines (PNAAPD). Data collection is supported by the research fund FIDEMAR, which is formed by the National Chamber of the Fishing Industry (CANAINPESCA), the Federal Government (CONAPESCA-INAPESCA), and the Mexican foundation for the preservation of marine wildlife (FUMDAMAR). This study was part of the Ph.D. thesis conducted by the first author (ETI) at the University of Montpellier 2 (ED SIBAGHE) and funded by Consejo Nacional de Ciencia y Tecnología (CONACYT), Mexico, scholarship No. 199730.

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Copyright information

© Royal Swedish Academy of Sciences 2016

Authors and Affiliations

  • Edgar Torres-Irineo
    • 1
    • 2
  • Michel Dreyfus-León
    • 4
    • 5
  • Daniel Gaertner
    • 1
  • Silvia Salas
    • 3
  • Paul Marchal
    • 6
  1. 1.UMR MARBEC, IRD, Centre de Recherche Halieutique Méditerranéenne et TropicaleSèteFrance
  2. 2.CONACYT, Unidad Multidisciplinaria de Docencia e Investigación, Facultad de CienciasUniversidad Nacional Autónoma de MéxicoSisalMexico
  3. 3.Centro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalMéridaMexico
  4. 4.Instituto Nacional de la Pesca, Facultad de Ciencias MarinasUABCEnsenadaMexico
  5. 5.San YsidroUSA
  6. 6.Channel and North Sea Fisheries DepartmentIFREMERBoulogne s/merFrance

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