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S\ 







Figure 9.— Catch and temperature data by block area for Pacific bonito caught 

 off southern California. 



Graphs of the temperatures and catches of bonito in the three lead- 

 ing block areas (860, 720, 756) appear in Figure 10a, b, c for distri- 

 bution of catch by temperature and by month for catch, temperature 

 at which most bonito were taken, the monthly mean catch tempera- 

 ture, and standard deviation of the mean catch temperature. 



Pacific barracuda.— Barracuda are caught mainly off Point La 

 Jolla fblock 860), near the city of San Clemente (block 756), and off 

 Huntington Beach (block 718). Catch peaks occur off La Jolla during 

 August and in Huntington Beach in September, with a few barracuda 



taken off Santa Barbara and the Channel Islands from August to 

 October. In Figure 1 1 , the catch temperature mean is higher than the 

 sea surface temperature mean in all months except January and Feb- 

 ruary; the means are about equal in those months. 



Figure 12a and b show, for block areas having a catch of 5,000 bar- 

 racuda or more during the survey period: the month having the 

 greatest total catch, temperature at which most barracuda were 

 caught, the mean catch temperature, and the number of barracuda in 

 the sample. 



The catch and temperature data for the three leading block areas 

 (860, 756, 718) are given in Figure 13a, b, c for distribution of catch 

 by temperature and by month for catch, temperature at which most 

 barracuda were caught, mean catch temperature, and standard devia- 

 tion of the mean catch temperature. 



White seabass. — All six major block areas for white seabass 

 catches are along the coast from Point Loma to Dana Point, with the 

 greatest numbers of white seabass recorded near Oceanside, Calif, 

 (block 801). August is the peak catch period for the three major block 

 areas, which are located off the coast from near Oceanside to Dana 

 Point. There is still much to learn about the migratory habits of the 

 white seabass, whether inshore, offshore, or alongshore. The catch 

 temperature mean is higher than the sea surface temperature mean 

 (Fig. 14) in all months except March, April, and November. 



Figure 15a shows block areas having a catch of 500 or more white 

 seabass during the survey period, and Figure 15b shows block areas 

 with catches greater than 100 fish: both show the month having the 

 greatest total catch, temperature at which most white seabass were 

 caught, mean catch temperature, and the number of white seabass in 

 the sample. 



Graphs of temperatures and catches for the three leading block 

 areas (801, 756, 822) are given in Figure 16a, b, c for distribution of 

 catch by temperature and by month for catch, temperature at which 

 most white seabass were caught, mean catch temperature, and stand- 

 ard deviation of the mean catch temperature. 



Albacore.— One of the most desirable species caught off southern 

 California is albacore tuna. These fish are commercially important, 

 and support an intensive sportfishery when they appear in fishable 

 concentrations off southern California. The environmental data on 

 which the albacore catch temperatures are based were collected over 

 only the inshore portion of the albacore catch area off southern Cali- 

 fornia and are valid only for the areas covered by the survey and for 

 the sportfishery which provided the catch data. 



Figure 17 shows that the peak catch is made during the months of 

 July and August, with minor catches in October and November. A 

 comparison of the catch temperature and temperature means shown 

 in the figure indicates that the catch temperature mean is higher than 

 the sea surface temperature mean in June, but falls below the temper- 

 ature mean during the peak catch period of August and September. 

 These comparisons indicate that peak catches in the survey area were 

 made in months when temperatures were below the mean. 



Block 882 west of San Diego includes the 43 Fathom Bank and is 

 the leading catch area within the area covered by this study. Figure 

 1 8a and b give catch and temperature data by block areas having a 

 catch of 1 ,000 or more albacore: the month having the largest total 

 catch, temperature at which most fish were caught, the mean catch 

 temperature, and the number of albacore in the sample. 



Catch and environmental data are given for the three leading block 

 areas (882, 916, 866) in Figure 19a, b, c, for distribution of catch by 

 temperature and by month for catch, temperature at which most alba- 

 core were caught, mean catch temperature, and standard deviation of 

 the mean catch temperature. 



