2500 - TOTAL ORGANISMS 



jiiiiii - 



-J 

 < 



H 

 S 



1500 - 



1000 



500 - 



PENAEUSSETIFERUS 



40(1 - 



?00  



200 



100 



20 40 



m -i 1 1 1 1 1 1 1 — 



60 X0 100 120 140 160 ISO 200 



10 20 .?0 40 50 60 



SQUILLA EMPUSA il)\Vi 



SOI III \ I MPLSA (NIGHT I 



4l l > 



175 



250 



200 



175 



150 - 



125 - 



100 



75 



50 - 



10 15 



NUMBER PER TOW IN 4.3 M TRAWL 



Figure 3.— Regression of catch per tow in 12.2 m trawl (Y t ) on catch per tow in 4.3 m trawl (AT,) for comparative tows during November 



986 



