12 



30-min tows with one sampler 



depth (ni) 

 



3 



6 



Sfandardization factor for catch & volume filtered: 

 V3 shallow H shallow 



30-min tows witli two samplers 



+ /j deep 



+ y2deep 



+ total deep 



Figure 2, Variations in tow profile due to varying water depth and procedures for standardization 

 of effort between stations. Ocean surface area corresponding to each standardized tow 

 was determined by dividing the standardized volume filtered by the maximum depth sampled. 

 Resultant catch densities were converted to catch per lOm^ for Table 3. 



