212 



NOAA Technical Report NMFS 140 



NEW \ NEW .' /V \ \ 



JERSEY '.YORK/ N \ NEW / 



\ \ HAMPSHIRE .' 



CONNECTION 



NDIVIDUALS 

 PER SQUARE METER 



< r =■ -prsr 7 <r < ? v" 



NEW \ NEW / \ \ 



JERSEY ', YORK/ '« \ NEW / 



\ \ hampshire ..' 



:onnecticut\ 



EXPLANATION 



□ <O.I - 9.9 

 H 10.0- 49.9 

 ■ 50.0 - 248.4 



GRAMS 

 PER SQUARE METER 



ASCIDIACEA 



Figure 237 



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

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



dard geographic areas, Georges Bank and the South- 

 ern New England Shelf (Table 6; Fig. 238). In these two 

 areas the biomass also was large (5.1 and 8.4 g in 2 ) 

 (Table 8; Fig. 238). In the four other areas their aver- 

 age density was low (2.8 or less/rrr), and the biomass 

 was relatively small (0.1 to 2.6 g/irr). Biomass was espe- 

 cially small (0.11 and 0.17 g/m ) in the two slope areas. 



Ascidians occurred in a moderately small proportion of 

 samples (12 to 23%) and were present in approximately 

 the same proportion of samples from all areas (Table 10). 



Bathymetric Distribution 



Ascidians occurred at water depths ranging from 13 to 



3,080 m, (Table 11; Fig. 239). Relatively high densities 



