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Article

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

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INRAE, UR EABX, 50 avenue de Verdun, CEDEX, 33612 Cestas, France
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Management of Diadromous Fish in Their Environment, OFB, INRAE, Institut Agro, UNIV PAU & PAYS ADOUR/E2S UPPA, 35042 Rennes, France
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AZTI, Sustainable Fisheries Management, Txatxarramendi ugartea z/g, 48395 Sukarrieta, Spain
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CIIMAR, Terminal de Cruzeiros do Porto de Leixões, 4405-208 Matosinhos, Portugal
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Departamento de Zoología, Universidad de Córdoba, 14080 Córdoba, Spain
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MARE, Marine and Environmental Sciences Centre, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal
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Departamento de Biologia Animal, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal
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GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Spain
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Office Français de la Biodiversité, 65 rue de St. Brieuc, 35042 Rennes, France
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IAV, bd de Bretagne, 56130 La Roche Bernard, France
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Author to whom correspondence should be addressed.
Academic Editor: Eleonora Ciccotti
Water 2021, 13(9), 1136; https://doi.org/10.3390/w13091136
Received: 23 February 2021 / Revised: 14 April 2021 / Accepted: 16 April 2021 / Published: 21 April 2021
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. View Full-Text
Keywords: Anguilla anguilla; complex model; participatory assessment; DISTATIS; Bayesian assessment model; GEREM Anguilla anguilla; complex model; participatory assessment; DISTATIS; Bayesian assessment model; GEREM
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MDPI and ACS Style

Drouineau, H.; Vanacker, M.; Diaz, E.; Mateo, M.; Korta, M.; Antunes, C.; Delgado, C.F.; Domingos, I.; Zamora, L.; Beaulaton, L.; Lambert, P.; Briand, C. Incorporating Stakeholder Knowledge into a Complex Stock Assessment Model: The Case of Eel Recruitment. Water 2021, 13, 1136. https://doi.org/10.3390/w13091136

AMA Style

Drouineau H, Vanacker M, Diaz E, Mateo M, Korta M, Antunes C, Delgado CF, Domingos I, Zamora L, Beaulaton L, Lambert P, Briand C. Incorporating Stakeholder Knowledge into a Complex Stock Assessment Model: The Case of Eel Recruitment. Water. 2021; 13(9):1136. https://doi.org/10.3390/w13091136

Chicago/Turabian Style

Drouineau, Hilaire, Marie Vanacker, Estibaliz Diaz, Maria Mateo, Maria Korta, Carlos Antunes, Carlos F. Delgado, Isabel Domingos, Lluis Zamora, Laurent Beaulaton, Patrick Lambert, and Cédric Briand. 2021. "Incorporating Stakeholder Knowledge into a Complex Stock Assessment Model: The Case of Eel Recruitment" Water 13, no. 9: 1136. https://doi.org/10.3390/w13091136

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