The IATTC, established by international convention in 1950, is responsible for the conservation and management of fisheries for tunas and other species taken by tuna-fishing vessels in the eastern Pacific Ocean. Each member country of the IATTC is represented by up to four Commissioners, appointed by the respective government.

The member countries of the IATTC are:

Belize, Canada, China, Cook Islands, the European Union and Chinese Taipei
are Cooperating Non Parties or Cooperating Fishing Entities.

The IATTC also has significant responsibilities for the implementation of the International
Dolphin Conservation Program (IDCP), and provides the Secretariat for that program.
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  IDCP-documents

  Statistical documents

  2007 purse-seine closure