■238- 



3 



cr 30 

 o 



5 '20- 



f no 



Z 



Ixl 100 



_l 



90 

 80 



70 

 60 

 50 

 40 

 30 



02 04 06 08 10 12 1.4 



ENTIRE FISHERY - AFTER 1971 



16 



I 8 20 



02 



04 



0.6 



08 10 I 2 14 



MULTIPLIER OF EFFORT 



1.6 



Figure 6. Estimated yield-per-recruit, as functions of age at recruit- 

 ment and fishing mortality vector multiplier, of North Pacific 

 albacore taken before and after 1971 by all gears combined. 



