L'échantillonnage des pêches artisanales dispersées : nécessité d'opérations préalables : l'exemple du Delta Central du Niger La recherche scientifique face à la pêche artisanale = Research and small-scale fisheries /Laë, Raymond PECHE ARTISANALE ENQUETE STATISTIQUE PECHEUR STRUCTURE DE POPULATION ENVIRONNEMENT Analysis of artisanal fisheries in developing countries is often confronted with the complete lack of knowledge of both the resource and the fishery. These problems facing scientists therefore seem unsurmountable : biotope heterogeneity, resource variability, diversity of fishing practices, large number of landing sites and the large area to be covered. The solution adopted in the Niger Central Delta, to obtain the data necessary for the definition of efficient sampling strategy in the shortest time, consisted of a preliminary multidisciplinary survey carried out at two typical times of the year : flood and low water. The statistical conception of the study is presented, together with results obtained in areas such as the type of fishermen and settlements, plus a stratification of the Delta into homogenous zones. These results should allow the adoption of a sampling scheme structured on a multi-dimensional stratification, likely to increase the efficiency and cost-benefit of future investigations. (Résumé d'auteur) ORSTOM /Durand, Jean-René (ed.) /Lemoalle, Jacques (ed.) Weber, J. (ed.) 1991 text https://www.documentation.ird.fr/hor/fdi:36745 fdi:36745 Laë Raymond, . L'échantillonnage des pêches artisanales dispersées : nécessité d'opérations préalables : l'exemple du Delta Central du Niger. In : Durand Jean-René (ed.), Lemoalle Jacques (ed.), Weber J. (ed.), . La recherche scientifique face à la pêche artisanale = Research and small-scale fisheries ORSTOM, ). 1991, 395-407 Symposium International ORSTOM-IFREMER, Montpellier (FRA), 1989/07/3-7 FR MALI