Pacific island nations have announced plans 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 today.

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 $US6,000 a day for the privilege.

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

He says the fee system has allowed Pacific nations to increase earnings from their tuna fisheries from $60 million in 2010 to more than $240 million last year.

"The PNA has shown how valuable the tuna resource is," Mr Loeak said.

"The need for enhanced, closer cooperation has never been more crucial if we want to continue reaping economic gains from our tuna resources."

The PNA allocates 50,000 fishing days a year to tuna boats, with demand high from both international and local operators.

The PNA comprises Papua New Guinea, Solomon Islands, Palau, Federated States of Micronesia, Kiribati, Nauru, Tuvalu and Marshall Islands.

AFP