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Ecological-economic resilience of a fished coral reef through stochastic multi-species MSY

Author

Listed:
  • Adrien LAGARDE
  • Luc DOYEN
  • Joachim CLAUDET
  • Olivier THEBAUD

Abstract

This paper investigates the ecological-economic resilience of coral reef ecosystems under fishing and environmental pressures. To achieve this, a dynamic, spatially explicit, multi-species, multi-fleet model is developed. Stochastic environmental shocks are also assumed to alter coral cover and consequently the entire coral reef socio-ecosystem. The model is calibrated using available ecological, economic and environmental data for Moorea (French Polynesia). Four exploratory fishing strategies and a goal-seeking strategy entitled SMMSY (Stochastic Multi-Species Maximum Sustainable Yield) are compared in terms of ecological-economic outcomes and resilience. The SMMSY turns out to promote ecological-economic resilience. It is first characterized by a global increase in fishing effort pointing out the relative current under-exploitation of the fishery. Secondly, SMMSY balances the trophic level of catches after natural shocks occurencies and sustains the fundamental herbivores grazing process. Fishing SMMSY strategies are also more diversified in terms of temporality, gears, location and targets. In a context of high food dependency, multi-criteria strategies pursuing socio-economic objectives along with ecosystem approach seem really relevant for complex insular socio-ecosystems.

Suggested Citation

  • Adrien LAGARDE & Luc DOYEN & Joachim CLAUDET & Olivier THEBAUD, 2020. "Ecological-economic resilience of a fished coral reef through stochastic multi-species MSY," Bordeaux Economics Working Papers 2020-11, Bordeaux School of Economics (BSE).
    • Handle: RePEc:grt:bdxewp:2020-11
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    File URL: http://bordeauxeconomicswp.u-bordeaux.fr/2020/2020-11.pdf
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    References listed on IDEAS

    as
    1. D. R. Bellwood & T. P. Hughes & C. Folke & M. Nyström, 2004. "Confronting the coral reef crisis," Nature, Nature, vol. 429(6994), pages 827-833, June.
    2. Luc Doyen, 2018. "Mathematics for Scenarios of Biodiversity and Ecosystem Services," Post-Print hal-03118045, HAL.
    Full references (including those not matched with items on IDEAS)

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    More about this item

    Keywords

    ecological-economics; biodiversity; ecosystems; scenarios; small-scale fisheries; sustainability; resilience; French Polynesia;
    All these keywords.

    JEL classification:

    • Q22 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - Fishery
    • C53 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Forecasting and Prediction Models; Simulation Methods

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