Publication Abstract

Estimation of technical interactions due to the competition for resource in a mixed species fishery, and the typology of fleets and metiers in the English Channel

Estimation of technical interactionsdue to the competition for resource in a mixed species fishery, and the typology of fleetsand metiers in the English Channel

C. Ulrich, D. Gascuel, M.R. Dunn, B. Le Gallic and C. Dintheer

In a multi-gear and multi-species artisanal fishery, the level oftechnical interactions (i.e. the competitive externalities resulting from a sharedexploitation of common resources or fishing grounds) among various fishing units is high.Assessing these technical interactions is of great importance for fishery management, asany control applied to one fishing unit may have positive negative effects on others. Themagnitude and direction of these effects cannot be easily measured, unless all fishingunits and species in the fishery are considered simultaneously. Technical interactions areparticularly important in the complex artisanal fisheries of the English Channel. Using abioeconomic model of the English Channel that incorporates all the major fishing units theBECHAMEL model), we describe a method for measuring and classifying the technicalinteractions due to the competition for resource (stock externalities). The results areused to develop a typology of métiers and fleets based on their overall level ofinteraction for the resource. We also define fleets and métiers as structuring,dependent, intermediate or autonomous.

Reference:

C. Ulrich, D. Gascuel, M.R. Dunn, B. Le Gallic and C. Dintheer, 2001. Estimation oftechnical interactions due to the competition for resource in a mixed species fishery, andthe typology of fleets and metiers in the English Channel. Aquatic Living Resources,14(5): 267-281.

C. Ulrich, D. Gascuel, M.R. Dunn*, B. Le Gallic and C. Dintheer

Aquatic Living Resources, 14(5): 267-281