In consultation with the French Office for Biodiversity, fishing professionals and the State, La Rochelle University-CNRS and the French Research Institute for the Exploitation of the Sea (Ifremer) have built the Delmoges project . As a first step, it aims to fill gaps in the understanding of the mechanisms behind the capture of common dolphins in the Bay of Biscay, by acquiring new data concerning the habitats and fine-scale movements of common dolphins, on their trophic interactions in the ecosystem and their technical interactions with fishing gear. Then, the project proposes to integrate knowledge on the entire socio-ecosystem to consider a variety of scenarios for reducing accidental captures including technological solutions and, finally, to assess the biological and socio-economic consequences.