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Each year, the IOTC Secretariat prepares a reference size data set for each IOTC species to provide information on the size composition of their catch in the IOTC area of competence. The data are collected on land by enumerators during unloading and transshipments and at sea by fishers and scientific observers from the IOTC Contracting Parties and Cooperating Non-Contracting Parties (CPCs) as per IOTC data requirements (IOTC Resolution 15/02). The data are submitted on an annual basis, mostly with the forms 4SF, and curated by the Secretariat for dissemination prior to the IOTC working groups.
