Etude spatiale des données collectées à bord des navires de pêche : en quoi est-elle pertinente pour la gestion des rejets de la pêche ?

Abstract : Since 2002, the European Union (EU) Members States collect, manage and supply data forthe management of fisheries and specifically of discards. In this context, at-sea observer programmes collect data on-board fishing vessels on the composition and quantity of catch, including discards. Based on these data, this study aims to analyse the spatio-temporal distribution of landings and discards so as to contribute to their management. In doing so, amapping method based on nested grids has been developed. This method has been designed to produce pluriannual, annual and quarterly maps of landings and discards per species or group of species according to the fishing metier.A platform based on Big Data technologies has then been used with the objectives of refining and automating the mapping method. Using an online storage system and a high-performance computing system, a large number of maps were produced automatically per métier, grouping or not years, quarters and species. Finally, the usefulness of the produced maps for managing discards has been demonstrated, particularly regarding the Landing Obligation (Regulation (UE) n° 1380/2013). Based on fleet cost and revenue data, these maps open up possibilities for identifying fishing zones and/or periods to be avoided (i.e., high bycatch) while minimising the impacts on fleet’s economic performances.
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Fabien Pointin. Etude spatiale des données collectées à bord des navires de pêche : en quoi est-elle pertinente pour la gestion des rejets de la pêche ?. Sciences de la Terre. Agrocampus Ouest, 2018. Français. ⟨NNT : 2018NSARH106⟩. ⟨tel-02138098⟩

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