| Two trawl surveys (1 993 may, october) have been conducted by the IFREMER in order to carry out a typology of demersal populations and to map the spatial distribution of the penaeid shrimp Penoeus subtilis (French Guyana shrimp fishery Deet target species) over the French Guyana continental shelf. For this purpose, a particular data analyses procedure was designed. On one hand, inertia and cluster analysis were used to detemline the main structures of dcmersal communities. On the other hand, mapping of Penaeus subtilis distribution, and espccially of the recruits in the fisher)', \Vas obtained through geostatistic technique. Impacts of the Amazon and Guyana ri vers on the demersal ecosystem are strong. They inducc separation between the demersal... |
