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NOAA Technical Report NMFS 140 



EXPLANATION 



□ <0. 1-0.3 



GRAMS 

 PER SQUARE METER 



TURBELLARIA 



Figure 5 1 

 Geographic distribution of Turbellaria: A — number of specimens per square meter of 

 bottom; B — biomass in grams per square meter of bottom. 



quantities, averaging 0.1 and 0.2 g/m 2 (Tables 8, 9; 

 Fig. 58). 



Frequency of occurrence of nemertines was moder- 

 ate in all geographic areas. They were encountered 

 most frequently (52% of the samples) in the Southern 

 New England Shelf. In all other areas they occurred in 

 25 to 35% of the samples (Table 10). 



Bathymetric Distribution 



Nemertea were found in water depths ranging from 7 

 to 3,820 m. Greatest density (27 individuals/m 2 ) was at 

 depths between 25 and 49 m (Tables 11, 12; Fig. 59). 

 Substantially lower densities (0.5 to 7.8 individuals/m 2 ) 

 were found at all other depths, with density generally 

 decreasing with increased depth. Lowest densities (0.5 



