GARTNER ET AL.: FISH ESCAPEMENTS FROM MIDWATER TRAWLS 



Table 3. — Mean cross-sectional dimensions (mm) and body morphologies for ranking myctophid species by size group. 

 Underline indicates dimensions where number of individuals per 10" m'' filtered are approximately equal between two 

 net meshes (crossover point on Figure 2a-f). D = body depth (mm); W = body width (mm). 



The smallest size at which the 4 mm mesh net 

 showed comparable catches to the 1.6 mm mesh for 

 any ranking species was 23 mm SL (Fig. 2). Regres- 

 sion of cross-sectional areas vs. length for sizes 



larger than 23 mm clearly grouped the ranking 

 species according to the catch patterns (Fig. 3). Dif- 

 ferences between groups were highly significant 

 (P < 0.001). 



■♦OO 800 1200 1600 2000 2400 2800 3200 3600 4000 



LENGTH (mm2) 



Figure 3.— Regressions of body cross-sectnonal area (mm^) on the square of length for ranking species of myctophids {Notolychnus 



valdiviae excluded). 



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