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Brochier Timothée, Auger Pierre, Thiao D., Bah A., Ly S., Nguyen-Huu Tri, Brehmer Patrice. (2018). Can overexploited fisheries recover by self-organization ? Reallocation of fishing effort as an emergent form of governance. Marine Policy, 95, 46-56. ISSN 0308-597X

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Lien direct chez l'éditeur doi:10.1016/j.marpol.2018.06.009

Titre
Can overexploited fisheries recover by self-organization ? Reallocation of fishing effort as an emergent form of governance
Année de publication2018
Type de documentArticle référencé dans le Web of Science WOS:000442190400006
AuteursBrochier Timothée, Auger Pierre, Thiao D., Bah A., Ly S., Nguyen-Huu Tri, Brehmer Patrice.
SourceMarine Policy, 2018, 95, p. 46-56. ISSN 0308-597X
RésuméOwing to high costs and difficulties in implement control, fisheries are less regulated than terrestrial activities. In areas of weak governance, self-regulation is often the rule. Understanding the underlying bio-economic mechanisms that drive such fishery systems is crucial for decision making on how to support real fishermen communities. Fishing effort reallocation occurs when economic yield drops, suggesting a feedback between fishermen's mobility and local overexploitation. The nature of this feedback is addressed here by using a bio-economic modelling approach applied to a Senegalese fishery. The white grouper is a highly valued commercial fish that has suffered intense exploitation in Senegal and was predicted to collapse due to a lack of fishery regulation combined with high demand. Surprisingly, our analysis of landings and associated price variability suggests that a slow recovery of this fishery is now underway. Motivated by this finding, two models were implemented that account for artisanal fishermen's mobility and variable prices. Both models provided the same insight: fishing effort mobility combined with variable fish prices induced a shift from local overexploitation to sub-regional sustainable exploitation. Considering that fishing effort mobility has steeply increased in recent years, this mechanism might have significantly contributed to the recent observed trends in prices and landings for this fishery. More generally, these bio-economic models suggest that spatial reallocation of fishing effort acts as emergent governance in under regulated areas that allows, in some cases, the recovery of an overexploited species.
Plan de classementRessources halieutiques [040] ; Démographie [108] ; Sciences fondamentales / Techniques d'analyse et de recherche [020]
Descr. géo.AFRIQUE DE L'OUEST ; SENEGAL
LocalisationFonds IRD [F B010073796]
Identifiant IRDfdi:010073796
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010073796

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