Purse Seine

Eastern Pacific Ocean : The U.S. tuna purse seine fleet in the eastern Pacific Ocean is subdivided based on whether they are smaller or larger than the 363 metric ton carrying capacity threshold. As of 2013, 10 purse seine vessels were listed on the IATTC Regional Vessel Register for operations in the eastern Pacific Ocean. These purse seiners target skipjack and yellowfin tuna. Tuna landings and ex-vessel values for this sector are confidential and cannot be disclosed due to the small number of vessels participating in the fishery.

Coastal (small-scale highly migratory species): Small coastal purse seiners, less than 363 metric tons in carrying capacity, primarily target pelagic species including Pacific mackerel, Pacific sardine, anchovy, and market squid. Some of these vessels also target Pacific bluefin, yellowfin, and skipjack tunas when they enter coastal waters of the southern California Bight from May to October. From 2002 to 2012, the number of vessels participating in this fishery ranged from 1 to 11, landing approximately 3,500 metric tons of highly migratory species, with a value for the fishery of approximately $3.3 million.

A purse seine net includes floats and weights and is used to encircle schools of fish. The net is enclosed using a purse line threaded through rings attached to the bottom of the net.