In the Western and Central Pacific Ocean, there are a number of entities involved in the management of highly migratory species, such as tuna. The first one is the Western and Central Pacific Fisheries Commission (WCPFC) whose mandate is is the Western and Central Pacific Fisheries Convention. The WCPF convention is an international fisheries agreement that seeks to ensure, through effective management, the long-term conservation and sustainable use of highly migratory fish stocks (i.e. tunas, billfish, marlin) in the western and central Pacific Ocean. Conservation and management measures that are developed under the terms of the Convention apply to these stocks throughout their range, or to specific areas within the Convention Area. There are also a number of sub-regional entities such as the Parties to the Nauru Agreement (PNA) and the Pacific Islands Fisheries Forum Agency (FFA).