In this progress report we present the context of the project POREMO funded by EU France in the frame of the development appropriate IOTC conservation measures and to mitigate this species bycatch in major European tuna fisheries in the Indian Ocean. The POREMO project aims to quantify the post release mortality of the oceanic white tip shark by-caught by the EU tuna purse seine and pelagic longline fisheries in order to assess the retention ban measure taken as conservation and management measure (CMM) for this species as specified in the IOTC resolution 13/06. The material purchased for these purposes and the present situation of electronic tag deployments are presented.