. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 1G0 CALIFORNIA FISH AND GAME. 030 CATCH PER HOUR FIGURE 5. Relationship of monthly catch per day and catch per hour during 1954 and 1955 for blocks and months with 30 or more full-day party boat trips. Dotted lines indicate equivalent intervals on the two scales, which are used in subsequent charts as measures of fishing success. success, but above the catch per day becomes progressively more distorted. This distort
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 1G0 CALIFORNIA FISH AND GAME. 030 CATCH PER HOUR FIGURE 5. Relationship of monthly catch per day and catch per hour during 1954 and 1955 for blocks and months with 30 or more full-day party boat trips. Dotted lines indicate equivalent intervals on the two scales, which are used in subsequent charts as measures of fishing success. success, but above the catch per day becomes progressively more distorted. This distortion is sufficient to cause marked differences in the yearly means during good fishing periods. For example, the catch per day indicates that fishing was 95 percent better in Block 301 in 1958 than it was in ]!>.*>(;, while the catch per hour indicates that it was 153 percent better (Figure 4). Differences in the average number of hours in a fishing trip in vari- ous blocks or seasons would also bias catch per day but not catch per hour. However, this is not a serious consideration at the present time, because the average length of an angler's day on full-day boats only varies between seven and eighl hours in various Mocks and seasons. Catch per hour figures are available only after 1953. To make the 1956-59 data as nearly comparable to earlier data as possible, the catch per day intervals previously used as standards of success (Calhoun, 1949) were equated to catch per hour intervals. This was done by fitting a line to the relationship between the mean monthly catches per day and the mean monthly catches per hour during 1954 and 1955 Figure 5). The comparable intervals, indicated by the dotted lines, were then used in the graphs of fishing success for each block. Both catch per day and catch per hour are included on the graphs for 1954 and 1955, so that the similarity of the two during this period can be Please note that these images are extracted from scanned pag
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