Composition and Distribution of Macrobenthic Invertebrate Fauna 



151 



CIRRIPEDIA 



Figure 148 



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

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



Bathymetric Distribution 



Barnacles were limited to the rather shallow depth range 

 of 8 to 329 m. They were substantially more plentiful (214 

 individuals/m ) in shallow water and diminished sharply 

 in abundance with increasing water depth (Table 1 1; Fig. 



150). Densities on the outer continental shelf and upper 

 slope were 2.3 and 0.7 individuals/m 2 , respectively. 



Biomass of barnacles in relation to bathymetric dis- 

 tribution was similar to that of numerical density. Bio- 

 mass was largest (27 g/m'-') in shallow water and de- 



