The relationship between the surface water tennperature and the 

 catch rate is shown in table 10. 



Table 10a. --Catch rate and surface temperature, Decennber, 

 30°N. -35°N., 150°E.-160°E. 



Table 10b. --Catch rate and surface temperature, December, 

 35°N. -40°N. , 150°E.-160°E. 



The water temperatures at which the catch rates are highest differ 

 north emd south of 35 N. , just as they did in the area of 140 E. to 150 E. 

 In the area of 30 N. to 35°N. two modes are seen at 18 to 19 C. and at 

 20° to 21°C. , while at 35°N. to 40°N. the mode appears at 18° to 19°C. 

 The average temperature at which fish were taken was 19. 8 C, south of 

 35 N. and 18. 5 C. north of that latitude, the temperatures in both cases 

 being higher than in the waters west of 150 E. 



It appears from table 9 that between 30 N. and 35 N. the surface 

 water temperatures at which fishing is good have a broad range of 18 to 



22°C. 

 18° to 



while north of 35 N. the best fishing is shown for the range of 

 19°C. 



III). Sea areas east of l60 E. 



This sea area has the highest catch rates with the least variation 

 of any of the North Pacific aulbacore fishing grounds. The albacore caught 

 here are also the largest taken on any of the grounds. This is the offshore 



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