en 



Q 



z 



o 



a. 



z 

 o 



X 



o 

 en 



8 



o 



3 



O 

 > 



o 



I- 



< 

 _l 

 a. 

 o 

 o 



N 



40 



30 - 



20 



10 - 



HMS-IO 



HMS-12 



JRM-8 



JUN 



JUL 



AUG 



SEP 

 MONTH 



OCT 



NOV 



DEC 



FIG 12 VARIATIONS IN SKIPJACK CATCH AND IN ZOOPLANKTON ABUNDANCE FOR HAWAIIAN 

 WATERS, DURING THE SUMMER AND FALL OF 1951. THE MEAN ZOOPLANKTON VOLUMES 

 ARE FOR THE ONE SECTION LINE JUST WEST OF OAHU, WHICH WAS VISITED REPEATEDLY 

 DURING THIS PERIOD. 



35 



