. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. FORTY-SECOND BIENNIAL REPORT 69 there has not been a really good hatch since 1947, the catch has dropped to its present low of slightly more than one-fifth the peak 1935-36 season. Also completed and published during the biennium was a study of the races or populations of Pacific mackerel (Fish Bulletin 84). This included detailed comparisons of fish taken between British Columbia and the Gulf of California. Statistical analysis of th
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. FORTY-SECOND BIENNIAL REPORT 69 there has not been a really good hatch since 1947, the catch has dropped to its present low of slightly more than one-fifth the peak 1935-36 season. Also completed and published during the biennium was a study of the races or populations of Pacific mackerel (Fish Bulletin 84). This included detailed comparisons of fish taken between British Columbia and the Gulf of California. Statistical analysis of the data revealed the proba- bility of two distinct populations within this range with the California fishery drawing upon the mackerel population from Canada to central Baja California. Routine sampling of the commercial catch continued without interrup- tion. Most of the basic information for the numerous biological studies is acquired from this The Pacific mackerel once supported a lucrative fishery but catches in recent years have declined seriously. JACK MACKEREL The jack mackerel catch in the Los Angeles region was considerably higher during this biennium than the last. Slightly more than 100 million pounds were landed here during the 1950-51 season and nearly 69 mil- lion pounds during 1951-52. Monterey reported the second highest catch, but only in September, 1950, when some 27 million pounds were taken, did monthly landings exceed five million pounds at that port. Biological work which originally consisted of routine sampling and age analysis was expanded during the biennium to include studies of maturity and egg production, food habits, and a racial or population investigation. In conjunction with the food analysis work, two short trips were made on the department's research boat, Yellowpin. These trips were nec- essary in order to obtain stomachs from daytime-caught mackerel to compare the contents with food organisms from stomachs of jack mack- erel caught
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