Commercial fisheries include the world's largest sockeye salmon fishery. At first, mahi-mahi were mostly bycatch in the tuna and swordfish longline fishery. Releasing wild trout helps preserve the quality of a fishery. The most controversial certification has been that of the Ross Sea Antarctic toothfish fishery. The Chilean toothfish fishery is separated into two separate fleets. Irrawaddy dolphins are fully protected as an endangered species under Cambodian Fishery Law. There is some fishery, mainly Baltic herring, for domestic needs. The PAVN is also involved in such areas as industry, agriculture, forestry, fishery and telecommunications. There is a small artisanal fishery for this species. The lake is an ecosystem with large fishery resources. The provincial economy is dominated by the seasonal industries of agriculture, tourism, and the fishery. It was the first and remains the only certified sustainable blue crab fishery worldwide. Victoria has had an active abalone fishery since the late 1950s. They have raised the supply of agricultural, fishery, and livestock products. Production lands in Cavite are intended for agriculture, fishery and mining.