Pacific island nations announced plans Thursday to dramatically increase the fees they charge tuna fishing boats for the right to enter their waters, saying it will boost revenue and help conservation efforts.

Around half the world's skipjack tuna, the most commonly canned variety, is caught in waters belonging to an eight-nation group known as the Parties to the Nauru Agreement (PNA), which opened its annual meeting in Majuro on Thursday.

Much of the fishing is conducted by so-called "distant water" fleets from as far afield as Europe, the United States, China, South Korea, Japan and Taiwan, who pay US$6,000 a day for the privilege.

Marshall Islands President Christopher Loeak said a plan by PNA nations to lift the day rate to US$10,000 in 2015 would help them improve management of a vital natural resource and ensure it was sustainable.

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