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Optimal biodiversity erosion in multispecies fisheries

Author

Listed:
  • Eric TROMEUR
  • Luc DOYEN
Abstract
As marine ecosystems are under pressure worldwide, many scientists and stakeholders advocate the use of ecosystem-based approaches for fishery management. In particular, management policies are expected to account for the multispecies nature of fisheries. However, numerous fisheries management plans remain based on single-species concepts such as Maximum Sustainable Yield (MSY) and Maximum Economic Yield (MEY), that respectively aim at maximizing catches and profits of single species or stocks. In this study, we assess the sustainability and profitability of multispecies MSY and MEY in a mixed fishery with technical interactions. First, we analytically show that multispecies MSY and MEY can induce overharvesting and extinction of species with low productivity and low monetary value. Second, we identify and discuss incentives on effort costs and landing prices, as well as technical regulations, that promote biodiversity conservation and more globally sustainability. Finally, a numerical example based on the coastal fishery in French Guiana illustrates the analytical findings.

Suggested Citation

  • Eric TROMEUR & Luc DOYEN, 2016. "Optimal biodiversity erosion in multispecies fisheries," Cahiers du GREThA (2007-2019) 2016-20, Groupe de Recherche en Economie Théorique et Appliquée (GREThA).
    • Handle: RePEc:grt:wpegrt:2016-20
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    File URL: http://cahiersdugretha.u-bordeaux.fr/2016/2016-20.pdf
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    References listed on IDEAS

    as
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    Cited by:

    1. Barman, Binandita & Ghosh, Bapan, 2019. "Explicit impacts of harvesting in delayed predator-prey models," Chaos, Solitons & Fractals, Elsevier, vol. 122(C), pages 213-228.
    2. Violaine Tarizzo & Eric Tromeur & Olivier Thébaud & Richard Little & Sarah Jennings & Luc Doyen, 2018. "Risk averse policies foster bio-economic sustainability in mixed fisheries," Cahiers du GREThA (2007-2019) 2018-07, Groupe de Recherche en Economie Théorique et Appliquée (GREThA).

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    More about this item

    Keywords

    Multispecies fishery; ecosystem-based fisheries management; maximum sustainable yield; maximum economic yield; overexploitation; technical interaction;
    All these keywords.

    JEL classification:

    • Q22 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - Fishery

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