. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. PROGRAM OP MARINE FISHERIES 91 the percentage scale from the highly refined and corrected one calcu- lated on a weekly basis. This is hardly surprising since the corrections imposed on the latter measure are based upon correlations which are true only on the average, and in which many complicating and unmeas- ured factors creep in. Corrections for these factors are only valid within the limits of the accuracy of agreement between the
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. PROGRAM OP MARINE FISHERIES 91 the percentage scale from the highly refined and corrected one calcu- lated on a weekly basis. This is hardly surprising since the corrections imposed on the latter measure are based upon correlations which are true only on the average, and in which many complicating and unmeas- ured factors creep in. Corrections for these factors are only valid within the limits of the accuracy of agreement between the variables concerned, and when the trend line is used for this correction all the other possible degrees of relationship expressed in the variation of the individual observed values about the average or trend line are lost. Many other fac- tors not measured by these corrections probably influence the magnitude of this measure of abundance. £00 150 100 a. i 1 1 r T T. "l r SARDINES RETURN PER UNIT OF EFFORT ALL CALIFORNIA EXPRESSED AS PERCENTAGE OF 1932-33 I •t o T I "T ~i 1 r SARDINES TOTAL CATCH COMPARED WITH .+.?0Ar EFFORT EXPENDED. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game. [San Francisco, etc. ] State of California, Resources Agency, Dept. of Fish and Game
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