6 6m 



COD END 



74 



13.4m 



00 I 



INTERMEDIATE 



226 



226 



226 



226 



10.8m 



BODY 



419 



453 



WINGS 



Figure 2. — Net plans for the pelagic trawl. Numbers on the net panels indicate number of meshes along the margins. 



Collections were preserved in 109c Formalin at 

 sea. In several instances large catches (>35 1) of 

 the pelagic trawl were subsampled, but at least 14 

 1 of the catch of each of the nets for discrete depths 

 were preserved. Fishes and cephalopods were 

 identified and measured [standard length (SL) of 

 fishes and dorsal mantle length ( DML ) of squids]. 



Table l. — Summary of pelagic trawl (PT) and Isaacs-Kidd 

 midwater trawl ( IKMT) tows made on the three "paired" cruises 

 off Oregon. 



Results 

 Flushing of the Pelagic Trawl 



In Puget Sound, divers observed that dead salm- 

 on smolts released in the mouth of the trawl were 

 never stuck against the netting in the forward 

 part of the trawl where the meshes were taut from 

 water pressure. Occasionally fish stalled against 

 the mesh in the aft section of net where netting 

 was less rigid, but these fish were easily dislodged 

 and tumbled toward the cod end. Because live 

 fishes usually swim away from the netting when 

 inside a trawl, it seems unlikely that live, active 

 fish would be pinned against the netting (G. 

 Loverich^). Obviously, dead, preserved fish do not 



^G. Loverich, Nor'Eastem Trawl Systems, Inc., Bainbridge 

 Island, WA 98110, pers. commun. January 1979. 



531 



