■18- 



N 

 U 

 M 

 B 

 E 

 R 







F 



V 

 E 

 S 

 S 

 E 

 L 

 S 



40 



38 



20 . 



10 . 



B. 



c 



A 

 T 

 C 

 H 



H 

 E 

 T 

 R 

 I 

 C 



T 

 

 N 

 S 



THOUSANDS 



18 



16 . 



14 . 



12 



10 . 



8 . 



2 - 



Figure 6. a) Total fishing effort in number of U.S. vessels 

 fishing in the Atlantic Ocean, 1967 to 1979. 



b) Total catch of yellowfin tuna for U.S. vessels 

 fishing in the Atlantic Ocean, 1967 to 1979. 



