FISHERY BULLETIN: VOL. 87, NO. 1 



lOOOOn 



6000- 



-Z 4-000 



2000- 



500 1000 



Effort — days fished plus searched 



Figure 5.— The relationship between Japanese yellowfin tuna catch and purse seine effort based 

 on quarterly statistics. The points have been connected in their temporal sequence. 



25000 



20000 



15000- 



•5 10000 



o 



>- 



5000- 



1000 2000 3000 4000 



Effort — days fished plus searched 



5000 



Figure 6.— The relationship between Japanese yellowfin tuna catch and purse seine effort based 

 on annual statistics. The points have been connected in their temporal sequence. 



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