■197- 



100 

 80 



06 



200-500 TONS 



o 100-200 TONS 



o 50 -1 00 TONS 



-4^^ °'^,fl— -a 30 — 50 TONS 



V 10— 20 TONS 

 ■X 20— 30 TONS 



-J L. 



I960 1962 1964 1966 



YEAR 



1968 1970 



Figure 6. --Catch per day's fishing by vessel size classes 

 in the Japanese skipjack tuna pole-and-line fishery. 

 (From Ishida 1975.) 



