. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. OCEAN TEMPERATURE AND STRIPED BASS TOO ._0 AVERAGE ANNUAL SEA SURFACE TEMI^ERATURE AT SCRIPPS PIER,LA JOLLA K AVERAGE DAILY BOAT CATCH OF STRIPED BASS IN POUNDS. Q < UJ cr (r o or UJ UJ <^ </) 5uj UJ tu I- or 1925 1926 YEAR FIGURE 4. The average commercial dcily boat catch of striped bass and average annual sea surface temperatures at La Jolla from 1920 through 1931. iiig in San Francisco Bay, but because of the tenipcratiire
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. OCEAN TEMPERATURE AND STRIPED BASS TOO ._0 AVERAGE ANNUAL SEA SURFACE TEMI^ERATURE AT SCRIPPS PIER,LA JOLLA K AVERAGE DAILY BOAT CATCH OF STRIPED BASS IN POUNDS. Q < UJ cr (r o or UJ UJ <^ </) 5uj UJ tu I- or 1925 1926 YEAR FIGURE 4. The average commercial dcily boat catch of striped bass and average annual sea surface temperatures at La Jolla from 1920 through 1931. iiig in San Francisco Bay, but because of the tenipcratiire coherence between stations along the coast we may regard tlie La -JoHa tempera- ture variations as indicators of the oceanic environment off central ('alifornia. Since the efficiency of a gill-net is dependent on fish swimming into it, fishing success is higher when nets are placed across the i)aths of well-defined runs. This principle is well-known to fishermen who care- fully place their gill-nets in specific areas and facing predetermined directions. It is also well-known that some anadromous fish migrate wdthin narrow well-defined paths, and towers have been erected in stra- tegic locations in the Kvichak Eiver System of western Alaska from which to count upstream salmon migrants (Becker, 1962). Therefore, catch-per-effort in a gill-net fishery is influenced by the nature and magnitude of fish movements. It is apparent that varia- tions in catch-per-effort of striped bass were a result of the fishery, centered in lower Suisun Bay, responding to the volume of fish flowing through Carquinez Strait; hence, the positive correlation resulted from an increased vulnerability when temperatures were higher. THE SPORT FISHERY Kadovich (1960 and 1961) used the ratio of catch-per-effort off cen- tral California, to catch-per-effort off southern California to obtain an index of latitudinal distribution for the Pacific sardine (Sardinops caerulea), independent of population size. Simil
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