Composition and Distribution of Macrobcnthic Invertebrate Fauna 



173 



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EXPLANATION 



D<o.i-o.9 



M 1.0-1.2 



GRAMS 

 PER SQUARE METER 



MYSIDACEA 



Figure 178 



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

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



ranged from less than 1% in the lowest range class to 

 18% in the highest range class (Table 25). 



Relation to Sediment Organic Carbon 



Mysids occurred in four of the eight organic carbon 

 content classes (Table 26; Fig. 183). Average densities 

 (ranging from 0.8 to 1.8 individuals/m - ') were quite 



similarly distributed among the four classes, exhibiting 

 a bimodal trend, one in the lower carbon content classes 

 (between 0.01 and 0.99%) and the other in the inter- 

 mediate (1.5 to 2.99%) classes. 



Biomass values were uniformly low (0.01 g/m 2 ) in all 

 organic carbon classes in which they occurred (Table 

 28; Fig. 183). 



