FISHERY BULLETIN: VOL. 74, NO. 4 



50001 



1000 = 



100 = 



5305 



a 



10 = 



5000 



1000 = 



5401 

 5402 



5000 



1000 = 



100: 



\0: 



5000: 



1000 



100: 



IOh 



5000 



1000 = 



100: 



10= 



I  



0- 



5506 

 r5507 



10 

 -JULY 7-13,1955 



15 



SEPT 4-6 

 SEPT 11-24 



0CT2I-30 

 NOV 8-13 

 N0VI6-I9 

 DEC 1-7 

 JAN 5-9, 1956 

 FEB 5-9 



20 



10 



15 



-SEPT 28 -OCT 5 5509-10 

 —OCT 29 -NOV 4 

 r-DEC5-ll 



— I — 

 10 



— I — 

 15 



TOTAL LENGTH (mm) 



Figure 11. -Cohort development of Euphausia pacifica, shown as progressions of length-frequency modes. Curves are 

 three-point running averages of portions of histograms in Figures 9 and 10. Cohort is identified by date (cruise) at 

 appearance of conspicuous mode of 2-3 mm larvae, a, 5305; b, 5309; c, 5406; d, 5502; e, 5505; f, 5509-10. 



748 



