FISHERY BULLETIN: VOL. 74, NO. 4 



NUMBER PER 1000 CUBIC METERS 



-2.^3. 4 



_2._3 



_2 _3 



^2.^3. 



2._3. 



_2 -3 



-2 3 _4 



„2. 3 



,2,„3 



10 10 10 10 10 10 10 1,0 1,0 1,0 10 10 10 1,0 1,0 10 1.0 1.0 10 10 10 10 101,0 10 10 10 10 10 10' 



m 



LU 



I- 

 U 



2 



100 

 300 

 500 

 700 



100 

 300 

 500 

 700 



■f} 



-I — I — I — I — rr 



LAPVAE 

 -t 1 1 



JUVENILES 



STATION 81 



5 ,,W > 



t: J. 





LARVAE 

 I I 1 1- 



.• > • 



JUVENILES 

 — I t 1 — 



STATION 39 

 ADULTS 



CL 



UJ 

 Q 



n - ' -- ' ,. ' 



^AK ,.'AE 



-H 1 I I 



~N 





JUVENILES 



-t * ~  I 



o o DAY 



• •NIGHT 



(a) 



NUMBER PER 1000 CUBIC METERS 



10 10 10 10^0 10 10 10 10 10 10 10 10 10 10^0 10 10 10 10 10 10 10 1010 10 10 10 10 10 10^10'' 



100 

 CO 



en 300- 

 u 



2 



500 



700 



.!. 



-I — I — 1 — t- 



JUVENILES 



.r..-- 



STATION 50,140 



• , , , I 1 



w - . * « ^ * * 



> m 



LARVAE 



-i 1 1 h- 



0* 



.•A 



JUVENILES 

 — I 1 » — 



STATION 50.110 



• , , , I 



. b'" 



"liZro 



LARVAE 

 I t 1— 





1 



JUVENILES 

 — t » 1 — 







STATION 5080 



ADULTS I 



1 1 1 1 



O O DAY 



IE • •NIGHT 



I- 



CL 



u 



100 

 300 

 500- 

 700- 



1°' 



.'• 



o ,' 



v.- 



JUVENILES 

 -* 1 1 ( — 



7- — ' — ' — r 



LARVAE 

 -♦ »— • — 



'-. 



STATION 7075 

 ADULTS t 

 — I ( 1 1 



(b) 



Figure 3.- The vertical distribution of Euphausia pacifica according to stage of development, (a) SOE cruise 22 and (b) CalCOFI cruise 



7008. 



observations indicate this species can be con- 

 tagiously dispersed. 



All phases of T. longipes (unspined form) were 

 collected in the upper 150 m. Juveniles and adults 

 were also abundant between 200 and 800 m. Por- 



tions of these older populations appeared to mi- 

 grate toward the surface at night at several 

 stations (SOE 9, 74, 81; CalCOFI 50.80, 50.110) 

 (Figure 4b). The vertical range of this species 

 agrees with observations by Brinton (1962b) and 



930 



