Figure 2. — Station locations, spring 1963. (The 183- and 1,829-m. depth contours are shown.) 



these subsamples and the remaining samples 

 were sorted according to taxonomic groups 

 and counted (appendix tables 1, 2, and 3). 

 Species of euphausiids, mysids, and fish were 

 identified and their distributions are discussed 

 in the following sections. 



To evaluate sampling variability, four repli- 

 cate shallow and deep oblique tows (four sam- 

 ples in each interval: surface to 30 m. and 30- 

 150 m.) were made during the spring cruise at 

 station 12 and two replicate shallow tows were 



made at most stations on lines III, VI, and 

 VII during the fall cruise (total of 30 samples). 

 Averaged coefficients of variation for the wet- 

 weight values (computed from the replicate 

 tows) were used as criteria for judging the 

 significance of areal differences in the biomass 

 values (figs. 4 and 5). The coefficients were 28 

 percent in spring and 46 percent in fall for the 

 shallow tows, and 17 percent in spring for the 

 deep tows. 



