Status of the Jack Mackerel resource and its management

Knaggs, Eric H. (1973) Status of the Jack Mackerel resource and its management. Long Beach, CA, California Department of Fish and Game, (Marine Resources Technical Report, 11)

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Abstract

The jack mackerel, Trachurus symmetricus, resource off the west coast of North America is known to be large and widely distributed. The spawning biomass is estimated to be 2.1 to 4.8 million tons based upon abundance of jack mackerel eggs collected at sea. The distribution extends from the Gulf of Alaska to the Gulf of Tehuantepec, off the coast of southern Mexico, and as far as 1,500 miles seaward. Within this range lies an area of maximum density which extends from Point Conception to central Baja California. Jack mackerel biological data has not been processed very rapidly due to higher priorities for analysis of sardine and Pacific mackerel data, and the apparent healthy condition of this resource. The California Department of Fish and Game initiated several projects in 1972 to resolve unanswered biological questions. (14pp.)

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