-176- 



Q 



<n 



15 



a: I 



4 - 



2 - 



2 4 6 8 



STANDARD DAYS FISHING (PS3)xlOOO 



10 



to 8 

 a. 



e) 



I 



>- 

 < 

 o 



Q 



< 

 a 



t; 



q: 



Q. 



I 



t^ 2 



< 



o 



6 - 



10 15 20 



STANDARD DAYS FISHING (PS3) x 1000 



25 



30 



Figure 6. 



Relationships between CPUE and effort (unregulated and 

 regulated) for skipjack in the CYRA north and south of 



reg 

 15° 



N, using data for all 5° areas, 1961 to 1978. 



