-22- 



120 



100 



77. ,76 .,3 



O 



I 



o 



I- 

 < 

 o 



30 40 50 60 

 EFFORT (XIO^SDA) 



Figure 8. Equilibrium yield curves generated from data of the total 

 Atlantic surface and longline fishery for yellowfin tuna, 

 1964 to 1979. 



