Methods for integrating data from fisheries and acoustic surveys in a spatial predator-prey approach to fisheries An ecosystem approach to fisheries implies among other that fish population dynamics need to be understood in relation with the behaviour of its predators in general and of fishers' in particular. In addition, predator-prey relations hips are known to consist of a variety of interactions across scales. To analyze interactions between fish and fishers' behaviour, we need to define meaningful indicators which may allow taking into account interaction processes over a continuum of scales. We worked on the Peruvian anchovy fishery. Observers at sea and satellite Vessel Monitoring System provided complementary information on fisher's behaviour. Several CPUE indexes were analyzed and one "multi-scales" index of sinuosity of spatial behaviour of vessels was developed . Regular (2 to 4 a year) scientific acoustic surveys performed by Imarpe made available accurate data on fish over a wide range of scales. We used 3 indexes based on acoustic data to characterize fish distribution over a continuum of scales: 1) an index of spatial concentration, 2) the fractal dimension of the anchovy distribution and 3) a clustering index based on the point processes Ripley's K function. Exploring statistical relationships between these indexes, we could show that fish and fishers behaviour are connected over a wide range of spatial scales.