Ecoviability for ecosystem-based fisheries management

Luc Doyen 1 Christophe Béné 2 Michel Bertignac 3 Fabian Blanchard 4 Abdoul Ahad Cissé 4 Catherine Dichmont 5 Sophie Gourguet 6 Olivier Guyader 6 Pierre-Yves Hardy 7 Sarah Jennings 8 Lorne Richard Little 9 Claire Macher 6 David Jonathan Mills 10, 11 Ahmed Noussair 12 Sean Pascoe 5 Jean Christophe Pereau 1 Nicolas Sanz 4 Anne-Maree Schwarz 10 Tony Smith 9 Olivier Thébaud 6
1 GREThA - Groupe de Recherche en Economie Théorique et Appliquée
2 CIAT International Center for Tropical Agriculture
3 STH - Unité de recherche Sciences et Technologies Halieutiques
4 LEEISA - Laboratoire Ecologie, évolution, interactions des systèmes amazoniens
5 Oceans and Atmosphere Flagship [Brisbane]
6 AMURE - Aménagement des Usages des Ressources et des Espaces marins et littoraux - Centre de droit et d'économie de la mer
7 CEFE - Centre d’Ecologie Fonctionnelle et Evolutive
8 UTAS - University of Tasmania
9 CSIRO Marine and Atmosphere Research [Hobart]
10 WorldFish
11 CoralCoE - ARC Centre of Excellence for Coral Reef Studies
12 IMB - Institut de Mathématiques de Bordeaux
Abstract : Reconciling food security, economic development and biodiversity conservation is a key challenge, especially in the face of the demographic transition characterizing many countries in the world. Fisheries and marine ecosystems constitute a difficult application of this bio‐economic challenge. Many experts and scientists advocate an ecosystem approach to manage marine socio‐ecosystems for their sustainability and resilience. However, the ways by which to operationalize ecosystem‐based fisheries management (EBFM) remain poorly specified. We propose a specific methodological framework—viability modelling—to do so. We show how viability modelling can be applied using four contrasted case‐studies: two small‐scale fisheries in South America and Pacific and two larger‐scale fisheries in Europe and Australia. The four fisheries are analysed using the same modelling framework, structured around a set of common methods, indicators and scenarios. The calibrated models are dynamic, multispecies and multifleet and account for various sources of uncertainty. A multicriteria evaluation is used to assess the scenarios’ outcomes over a long time horizon with different constraints based on ecological, social and economic reference points. Results show to what extent the bio‐economic and ecosystem risks associated with the adoption of status quo strategies are relatively high and challenge the implementation of EBFM. In contrast, strategies called ecoviability or co‐viability strategies, that aim at satisfying the viability constraints, reduce significantly these ecological and economic risks and promote EBFM. The gains associated with those ecoviability strategies, however, decrease with the intensity of regulations imposed on these fisheries.
Keywords : Fisheries Marine ecosystems Bio‐economic challenge Ecosystem‐based fisheries management Small‐scale fisheries Large‐scale fisheries Multicriteria evaluation Ecoviability
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Journal articles
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https://hal.univ-brest.fr/hal-01940469
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Submitted on : Friday, November 30, 2018 - 11:56:36 AM
Last modification on : Friday, January 24, 2020 - 3:38:02 PM

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Luc Doyen, Christophe Béné, Michel Bertignac, Fabian Blanchard, Abdoul Ahad Cissé, et al.. Ecoviability for ecosystem-based fisheries management. Fish and Fisheries, Wiley-Blackwell, 2017, 18 (6), pp.1056-1072. ⟨10.1111/faf.12224⟩. ⟨hal-01940469⟩

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