Composition and Distribution of Macrobenthic Invertebrate Fauna 207 



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 JERSEY WORK/ '» \ NEW / 



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NDIVIDUALS 

 PER SQUARE METER 



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EXPLANATION 



<O.I- 9.9 

 10.0- 49.9 

 50.0-105.3 



GRAMS 

 PER SQUARE METER 



ASTEROIDEA 



Figure 226 



Geographic distribution of Asteroidea: A-n umber of specimens per square meter 

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



carbon content classes. The four classes in which they 

 occurred ranged from 0.01 to 1.99%. Average density 

 was fairly low but relatively uniform in the three classes 

 between 0.01 and 1.49% carbon content, ranging from 

 1 .6 to 1 .0 individuals/m 2 (Table 26; Fig. 231 ) . The 1 .50 

 to 1.99% class, however, contained only 0.4 individu- 

 als/m 2 . 



The distribution of biomass was parallel to that of den- 

 sity, highest (5.5 g/m ) in the 1.00-1.49%- carbon content 

 class and dropping off significantly in higher and lower 

 adjacent content classes where values were uniformly low, 

 ranging from 1.03 to 1 .42 g/m 2 (Table 28; Fig. 231 ). 



Frequency of occurrence of asteroids in the samples 

 in the organic carbon content classes ranged from 14 to 



