The 2000 south pacific treaty controls the amount of commercial fish caught each year.

The 2000 South Pacific Tuna Treaty controls the amount of commercial fish caught each year.

The Pacific Tuna Treaty controls by the commercial fish caught each year.

Explanation:

The 2000 south island tuna treaty controls the agreements between the U.S and the 16 island countries. This treaty allows the U.S vessels to fish in the exclusive economic zones of the pacific island countries that are a party to the treaty.