Incorporating Stakeholder Knowledge into a Complex Stock Assessment Model: The Case of Eel Recruitment

Hilaire Drouineau (), Marie Vanacker (), Estibaliz Diaz, Maria Mateo, Maria Korta, Carlos Antunes, Carlos Fernández Delgado, Isabel Domingos, Lluis Zamora, Laurent Beaulaton (), Patrick Lambert () and Cédric Briand ()
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Hilaire Drouineau: UR EABX - Ecosystèmes aquatiques et changements globaux - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Pôle OFB-INRAE- Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement - AGROCAMPUS OUEST - UPPA - Université de Pau et des Pays de l'Adour - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement - OFB - Office français de la biodiversité
Marie Vanacker: UR EABX - Ecosystèmes aquatiques et changements globaux - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement
Estibaliz Diaz: AZTI - Centro de Investigación Marina y Alimentaria
Maria Mateo: AZTI - Centro de Investigación Marina y Alimentaria
Maria Korta: AZTI - Centro de Investigación Marina y Alimentaria
Carlos Antunes: CIIMAR - Interdisciplinary Centre of Marine and Environmental Research [Matosinhos, Portugal] - Universidade do Porto = University of Porto
Carlos Fernández Delgado: Universidad de Córdoba = University of Córdoba [Córdoba]
Isabel Domingos: ULISBOA - Universidade de Lisboa = University of Lisbon = Université de Lisbonne
Lluis Zamora: UdG - Universitat de Girona = University of Girona
Laurent Beaulaton: OFB - Office français de la biodiversité, Pôle OFB-INRAE- Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement - AGROCAMPUS OUEST - UPPA - Université de Pau et des Pays de l'Adour - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement - OFB - Office français de la biodiversité, U3E - Unité Expérimentale d'Ecologie et d'Ecotoxicologie Aquatique - U3E (Rennes, France) - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement
Patrick Lambert: UR EABX - Ecosystèmes aquatiques et changements globaux - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Pôle OFB-INRAE- Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement - AGROCAMPUS OUEST - UPPA - Université de Pau et des Pays de l'Adour - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement - OFB - Office français de la biodiversité
Cédric Briand: IAV - Institution d'aménagement de la Vilaine

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Abstract: Mistrust between scientists and non-scientist stakeholders is a key challenge in fishery management. The support of management with complex models is difficult, as these models cannot easily communicate their results to end users, resulting in a lack of confidence. As an example, the complex life cycle of the European eel raises problems of coordination and discussion among the multiple actors involved in the species' management. The GEREM model has been proposed as a tool for estimating recruitment, but its complexity, which is essential for addressing the characteristics of the species, makes it difficult to understand and accept by all stakeholders. In the context of the SUDOANG project, we proposed a co-parametrisation of this assessment model to tackle this mistrust. Through the use of various questionnaires, stakeholders were involved in two important choices for the model (zone definition and prior construction). Regular workshops and presentations were organised to explain the model rationales and to gather feedback and expectations. The results show that stakeholders have very similar perceptions of the potential definitions of sub-areas of recruitment in south-western Europe, and these perceptions are consistent with the underlying environmental conditions. On the other hand, the stakeholders have contrasting opinions about the exploitation rates of fisheries in different river basins, and the use of their knowledge currently has little effect on GEREM estimates. More importantly, the overall approach of this study is thought to have reconstructed the trust and confidence among participants.

Keywords: Anguilla anguilla; complex model; participatory assessment; DISTATIS; Bayesian assessment model; GEREM (search for similar items in EconPapers)
Date: 2021
New Economics Papers: this item is included in nep-env
Note: View the original document on HAL open archive server: https://hal.science/hal-03206805v1
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Published in Water, 2021, 13 (9), pp.1136. ⟨10.3390/w13091136⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-03206805

DOI: 10.3390/w13091136

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