. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 132 CALIFORNIA FISH AND GAME. 2 3 4 SPAWNING STOCK SUE 6 7 Billions of Fish 10 FIGURE 7. Pacific sardine year-class size related to spawning stock size, with the maximum and minimum parabolas and parabola of best fit. passed thronjili one of the points represented by the years 1985 and 1947, it is nnlikcly that it Avonhl have passed throimh both. Siiuilarly, the parabola re]n-esentin^' tlie [)oorest conditions ])robably would not pass
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 132 CALIFORNIA FISH AND GAME. 2 3 4 SPAWNING STOCK SUE 6 7 Billions of Fish 10 FIGURE 7. Pacific sardine year-class size related to spawning stock size, with the maximum and minimum parabolas and parabola of best fit. passed thronjili one of the points represented by the years 1985 and 1947, it is nnlikcly that it Avonhl have passed throimh both. Siiuilarly, the parabola re]n-esentin^' tlie [)oorest conditions ])robably would not pass through both the points represented by 1944 and 1945. In reality the ultimate size and niaxinium for llic upper parabola (describing- the best coudilionsl should fall farther to the fight and for the lower parab- ola farther to the left (as in Figure 3). It is noteworthy that during the 193()'s and through 1942, the parab- ola of best fit describes the data (juitc well except for the l!i;5!» yeai'- class. The 1939 year-class, the lai-gest recorded, was successful as far north as British Columbia but never was outstanding in the southei-n California catches. Thus, its availability may liave been higher than for other year-classes. Three successive poor year-classes (1943, 1944. and 1945) which re- sulted from near optimal stocks )ir(H'eded the first collapse of the sardine With poor survival during these three years, continued high fishing effort (Clark and Daugherty, 19501 a])parently helped reduce the i)o])ulatioii by 1946 to a level fi'om which it has not yet recovered. There is a possibility the fishery would have recovered if the sjiawn- ing stock had been near the optimum s'r/.c in 194(i, 1947 and 1948, when envii'ouniental conditions ina\' !ia\'e l)>'en 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 re
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