. Commercial fisheries review. Fisheries; Fish trade. By the early 1960s, researchers realized that stocks of yellowfin tuna had reached their maximum sustainable harvest. In 1966, the yellowfin were brought under effective international regulation for the first time. Underutilized Tuna Species With yellowfin tuna landings at a peak, it became important to increase the harvest of underutilized tuna species - -or imports would continue to spiral. The La Jolla report states: "Fortunately, it appears possible that the skipjack tuna (Katsuwonus pelamis) popula- tion and perhaps those of the t
. Commercial fisheries review. Fisheries; Fish trade. By the early 1960s, researchers realized that stocks of yellowfin tuna had reached their maximum sustainable harvest. In 1966, the yellowfin were brought under effective international regulation for the first time. Underutilized Tuna Species With yellowfin tuna landings at a peak, it became important to increase the harvest of underutilized tuna species - -or imports would continue to spiral. The La Jolla report states: "Fortunately, it appears possible that the skipjack tuna (Katsuwonus pelamis) popula- tion and perhaps those of the temperate tunas are not fully harvested and ways of increasing the take of these species by California ves- sels are now being studied within the Fishery- Oceanography Cent-^T-," Skipjack (Katsuwonus pelamis) k J=^ ^^ \ W ^^"—- ——f Salmon Fishery Stable The salmonfishery off Northern California has been stable since the late 1930s. The value of landings has increased. Industrial Fishery Troubled The industrial fishery ("wetfish ;) is worst off. It uses pelagic specie, of the California Current. These are reduced to fish meal and oil--canned as inexpensive canned products (mostly for export) and proc- essed into animal foods. This fishery de- clined from great prosperity in the 1930s and 1940s to current despair. In 1939, landings topped 500,000 tons; by 1966, they had dropped to about 60,000 tons. The decline is attributed mostly to the collapse of the northern subpopulation of the Pacific sardine (Sardinops caerulea). This began during the 1940s and hit bottom in the 1950s. In 1939 sardine landings were 500,000 tons--79% by weight and 34% by value of all landings; in 19 6 6, they were only a few hundred tons. ^— Sardine (Pilchard) (Sardinops caerulea). Fresh Fish The fishery for fresh fish is less depressed than the industrial fishery. The landings in 1966 were about the same as in 1939, but their value was higher. Fishery for Invertebrates T
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