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Fishery Bulletin 101(3) 



between trawlable and untrawlable habitats is shown in 

 Figure 5. To achieve power of 80% (r<=0.05), the required 

 number of dives ranges from n = 5 (.d=2.0) to n = 17 (d=1.0); 



similarly, to obtain 90'/r power would require 8 to 27 dives. 

 Empirical estimates of c/ from our study ranged from 1.1 

 for tiger rockfish to 2.0 for flatfish. This result suggests 



