15 



5 10 



AERIAL INDEX (night) I 



Figure 54.— Comparison of the anchovy aerial index (night) and the anchovy 

 spawning biomass. 



LlJ 

 3 

 CL 



O 



X 



UJ 

 Q 



^D 



• 1967 







PACIFIC BONITO 





2.0 



~ SOUTHERN CALIFORNIA 



^1963 

 • 



I.5 



1968 



• 



*I972 



1971 ' 



p 1964 



1965 



• 



• 1966 



I.O 



~S *I969 





0.5 



nn 



9 1970 



CPUE j-3 = 0.92 + 0.57 I D 

 r = 0.69 



1 1 



1 



0.0 0.5 1.0 1.5 



AERIAL SURVEY DAY INDEX (I D ) 

 Figure 65.— Regression of aerial survey day index for Pacific bonito against 

 partyboat CPUE index 3 yr earlier. Comparison data is for observations off 

 southern California onlv. 



75 



