BATHYPELAGIC SQUID BATHYTEUTHIS 



177 



average catch by areas; Table XIII oives the number and percent of 

 successful tows at various depths by area. Figures 66 through 68 are 

 graphic representations of the data. The plots of distribution on the 

 vertical sections along selected meridians also illustrate the points of 

 the discussion (figs. 21 to 36). The term Antarctic Convergence is used 

 in this section to refer to a general area of the ocean that underlies the 

 Antarctic ConA'ergence Zone and is not used in the restricted sense in 

 reference to the oceanographic phenomenon at a ]3oint on the surface. 

 "Total tows" refers to all the tows made at depths greater than 500 m, 

 because 100 3-meter IKMT tows were made at depths of less than 500 m 

 throughout the Antarctic during the period covered by this study, and 

 not a single specimen of B. dbysslcola was captured. (Three exceptions 

 have occurred since Cruise 19 and these are discussed elsewhere.) 



■^ 



1500 \V« l-i 



50% 



50% 



Figures 66. — -a, c, Total number of 3-meter IKMT tows (clear area) and number of 

 successful tows (hatched area) at 250-meter depth increments in the Atlantic sector of the 

 Antarctic Ocean (a) and in the Peru Current (c). b, d, Percentages (clear area) of total 

 number of 3-meter IKMT tows (hatched area) that caught Bathyteuthis abyssicola at 

 250-meter increments in the Atlantic sector of the Antarctic Ocean (b) and in the Peru 

 Current (d). 



