Marine resources are one of the pillars of the Mediterranean diet. Their mode of acquisition and their consumption in southern France are still little known to archaeology in historical periods. However, in other regions of Western Europe and in certain areas of the Mediterranean, archaeological tools have made it possible to reveal hitherto unknown aspects of these practices. This project proposes to couple for the first time an archaeo-ichtyological approach of medieval and modern periods for the South of France with ananalysis of the isotopic signatures of certain taxa. This innovative and transdisciplinary approach will initially concern three medieval and modern sites in Provence. An essential part of this pilot project will concern the establishment of a new and unprecedented current reference system, which is essential for a reliable and precise interpretation of the isotopic results. This repository will include reference collections of ichthyologicaldata from Aix-en-Provence and Madrid. At the end of this AMORCE project, the deployment of a similar project throughout the Mediterranean thanks to a collaboration with several European laboratories and universities will allow a diachronic approach to this essential practice of Mediterranean life