

Is?! 





■* 



f 



0' 



'it-, 



Figure 5 Chart of the distribution of skipjack 

 fishing grounds (1937) 



Legend showing the catch within each degree of latitude 

 and lonsiitude 



IvViVj 



1,000 - 10,000 fish 

 10,000 - 100,000 fish 

 mo, 000 - 1,000,000 fish 

 1,000,000 - 2,000,000 fish 



A. Satsunan Area 



L. Kinan Area 



C. Izu Is. Area 



D. Ggasnwara Area 



E. Southern part of t^o Northeastern Area foff Tokiwn and Nojlmazaki) 



F. Northern part of the Northeesterr Area (off Sanriku) 



15 



