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• 1. [Article] A Bio-Economic Model for the Viable Managementof the Coastal Fishery in French Guyana

  The coastal fishery in French Guyana is a challenging case study for the implementation of the ecosystem based fishery management. Although the current situation of this small scale fishery could be considered ...

  Citation × Citation Citation Abstract Copy Title: A Bio-Economic Model for the Viable Managementof the Coastal Fishery in French Guyana Author: Gourguet, Sophie, Doyen, Luc, Cisse, Abdoul, Blanchard, Fabian, Guyader, Olivier, Pereau, Jean Christophe The coastal fishery in French Guyana is a challenging case study for the implementation of the ecosystem based fishery management. Although the current situation of this small scale fishery could be considered as satisfactory, the viability of the fishery can be questioned. Indeed according to demographic scenarios, the growth of the population will generate an increase of local food demand and therefore growing fishing pressures. Moreover, there is no direct regulation for limiting the fishing catches. Models and quantitative methods to tackle this sustainability issue are still lacking for such mall-scale fisheries mainly because of the various complexities underlying the systems including the heterogeneity of the production factors, the weak selectivity of fleets and high fish biodiversity levels. In the present paper, we both use numerical simulations and a viability perspective to deal with such a problem. We first build a multi-species multi-fleets dynamic model relying on thirteen exploited species and four types of fleets. It accounts for potential trophic interactions, fishing effort and the corresponding costs and revenues. The model was fit on data collected since 2006 by Ifremer: daily production and efforts data, as well as economic data from a survey on the production costs and selling prices in 2009.The co-viability of the system under different scenarios of fishing efforts is studied through ecological and economic performances. The biological viability constraints focus on biodiversity index as species richness or trophic index while economic viability constraints intend to guarantee profitability to all the fleets. Title: A Bio-Economic Model for the Viable Managementof the Coastal Fishery in French Guyana Author: Gourguet, Sophie, Doyen, Luc, Cisse, Abdoul, Blanchard, Fabian, Guyader, Olivier, Pereau, Jean Christophe The coastal fishery in French Guyana is a challenging case study for the implementation of the ecosystem based fishery management. Although the current situation of this small scale fishery could be considered as satisfactory, the viability of the fishery can be questioned. Indeed according to demographic scenarios, the growth of the population will generate an increase of local food demand and therefore growing fishing pressures. Moreover, there is no direct regulation for limiting the fishing catches. Models and quantitative methods to tackle this sustainability issue are still lacking for such mall-scale fisheries mainly because of the various complexities underlying the systems including the heterogeneity of the production factors, the weak selectivity of fleets and high fish biodiversity levels. In the present paper, we both use numerical simulations and a viability perspective to deal with such a problem. We first build a multi-species multi-fleets dynamic model relying on thirteen exploited species and four types of fleets. It accounts for potential trophic interactions, fishing effort and the corresponding costs and revenues. The model was fit on data collected since 2006 by Ifremer: daily production and efforts data, as well as economic data from a survey on the production costs and selling prices in 2009.The co-viability of the system under different scenarios of fishing efforts is studied through ecological and economic performances. The biological viability constraints focus on biodiversity index as species richness or trophic index while economic viability constraints intend to guarantee profitability to all the fleets. Close