What are we protecting? Fisher behavior and the unintended consequences of spatial closures as a fishery management tool

Joshua Abbott, Alan C. Haynie

    Research output: Contribution to journalArticle

    68 Scopus citations

    Abstract

    Spatial closures like marine protected areas (MPAs) are prominent tools for ecosystem-based management in fisheries. However, the adaptive behavior of fishermen, the apex predator in the ecosystem, to MPAs may upset the balance of fishing impacts across species. While ecosystem-based management (EBM) emphasizes the protection of all species in the environment, the weakest stock often dominates management attention. We use data before and after the implementation of large spatial closures in a North Pacific trawl fishery to show how closures designed for red king crab protection spurred dramatic increases in Pacific halibut bycatch due to both direct displacement effects and indirect effects from adaptations in fishermen's targeting behavior. We identify aspects of the ecological and economic context of the fishery that contributed to these surprising behaviors, noting that many multispecies fisheries are likely to share these features. Our results highlight the need either to anticipate the behavioral adaptations of fishermen across multiple species in reserve design, a form of implementation error, or to design management systems that are robust to these adaptations. Failure to do so may yield patterns of fishing effort and mortality that undermine the broader objectives of multispecies management and potentially alter ecosystems in profound ways.

    Original languageEnglish (US)
    Pages (from-to)762-777
    Number of pages16
    JournalEcological Applications
    Volume22
    Issue number3
    DOIs
    StatePublished - Apr 1 2012

    Keywords

    • Bycatch
    • Ecosystem-based management
    • Fisher behavior
    • Implementation error
    • Marine protected areas
    • Multispecies management
    • Spatial closures

    ASJC Scopus subject areas

    • Ecology

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