-240- 



^ 70 C-- 7?, 



08 10 12 14 



MULTIPLIER OF EFFORT 



1.6 18 2 



Figure 7. 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 the Japanese surface 

 fishery. 



