QUAST: DISTRIBUTION OF ARCTIC COD 



Table 1. — Station data for trawl collections in the eastern Chukchi Sea during WEBSEC-70. 



Date and inclusive time Approximate position 



Hauls 



^M = multldepth hauls with 1.8-m (6-foot) Isaacs-Kidd mid-water trawl, and R 

 ^Depth at depressor. 



= replicate hauls at single depth. 



I 



168° 



166" 



164" 



162° 



ICY CAPE 



Figure 1. — Sequence and position of IKMT stations (circles) in the eastern Chukchi Sea in 1970. 

 Dashed lines indicate time spans for groups of stations. 



and February, and their eggs are large — 

 approximately 1.5-1.9 mm in diameter. Rass 

 (1968:136) adds that the first larvae appear in 

 the sea in May-July; the larval stage (5.4-15.0 

 mm) lasts about 2 mo (in the Barents and Siberian 

 Seas through June-July); and transition to 

 juveniles is at 30-50 mm, in August. 



Arctic cod appear to be a key species in the 

 ecology of the arctic seas. They are widespread, 

 locally abundant, and probably are a major 

 element of the secondary consumer level in the 

 trophic pyramid. Ponomarenko (1967:8) found 

 that cod larvae and fry fed successively on 

 copepod eggs, nauplii, and copepodites, and 



1095 



