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Fleet Behaviour Under Economic Uncertainty: Multi‐Species Policy Scenarios for the Purse‐Seine Fishery

Author

Listed:
  • Alex Tidd

    (UMR Marbec - Station Sète - MARine Biodiversity Exploitation and Conservation - Station Ifremer Sète - UMR MARBEC - MARine Biodiversity Exploitation and Conservation - MARBEC - IRD - Institut de Recherche pour le Développement - IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer - CNRS - Centre National de la Recherche Scientifique - UM - Université de Montpellier)

  • Laurent Dagorn

    (UMR Marbec - Station Sète - MARine Biodiversity Exploitation and Conservation - Station Ifremer Sète - UMR MARBEC - MARine Biodiversity Exploitation and Conservation - MARBEC - IRD - Institut de Recherche pour le Développement - IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer - CNRS - Centre National de la Recherche Scientifique - UM - Université de Montpellier)

  • Mariana Travassos

    (UMR MARBEC - MARine Biodiversity Exploitation and Conservation - MARBEC - IRD - Institut de Recherche pour le Développement - IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer - CNRS - Centre National de la Recherche Scientifique - UM - Université de Montpellier)

  • Patrice Guillotreau

    (UMR Marbec - Station Sète - MARine Biodiversity Exploitation and Conservation - Station Ifremer Sète - UMR MARBEC - MARine Biodiversity Exploitation and Conservation - MARBEC - IRD - Institut de Recherche pour le Développement - IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer - CNRS - Centre National de la Recherche Scientifique - UM - Université de Montpellier)

Abstract

ABSTRACT Managing fishing effort remains a central challenge in achieving sustainability in many fisheries, particularly where high‐value species attract intense competition. In the Indian Ocean tropical tuna fishery, understanding how fishers respond to changing bio‐economic conditions is essential for developing effective management. This study evaluates the influence of effort‐based management measures on the size and investment behaviour of the purse‐seine fleet targeting skipjack ( Katsuwonus pelamis ) and yellowfin tuna ( Thunnus albacares ). Using Random Utility Models (RUMs), we identify the key economic drivers of strategic decision‐making, validate them through model evaluation, and integrate them with age‐structured operating models (OMs). The RUM achieves 93% predictive accuracy, offering a robust basis for exploring policy options that balance conservation and economic objectives. Scenario testing under different cost and price conditions illustrates how economic pressures shape entry and exit decisions within the fleet.

Suggested Citation

  • Alex Tidd & Laurent Dagorn & Mariana Travassos & Patrice Guillotreau, 2026. "Fleet Behaviour Under Economic Uncertainty: Multi‐Species Policy Scenarios for the Purse‐Seine Fishery," Post-Print hal-05588064, HAL.
    • Handle: RePEc:hal:journl:hal-05588064
    DOI: 10.1111/fme.70071
    as

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