-177- 



^0 I 2 3 4 5 6 



X 



STANDARD DAYS FISHING (PS3)kI000 



10 15 20 25 30 



STANDARD DAYS FISHING (PS3) x 1000 



Figure 7. Relationships between CPUE and effort (unregulated and 

 regulated) for skipjack in the CYRA north and south of 

 15° N, using only data for selected 5° areas, 1961 to 

 1978. 



