■15- 



n 



o 

 o 



X 



o 

 u. 



IC3 



88 . 



63 



40 



23 . 



1967 



1969 



1977 



B. 



I9G9 



1977 



1979 



Figure 4. a) Fishing effort (number of hooks) on yellowfin tuna from 

 the eastern Atlantic longline fishery, 1967 to 1977. 



b) Fishing effort (standard purse seine days absence, SDA) 

 on yellowfin tuna from the eastern Atlantic surface 

 fishery, 1967 to 1979. 



