Composition and Distribution of Macrobenthic Invertebrate Fauna 



55 





c ' *&l 





( 



Figure 22 



Coarse brown sand with broken shells and gravel, to 15 cm, bottom at 86 m depth on eastern 

 Georges Bank. Camera tripping weight is visible at upper left-center edge of frame. Photograph 

 was taken at station 1 13(1. located at lat. 4201' V. long. 66°31' W. 



Biomass of 218 g/rrr occurred in the 0.01 to 0.49% range 

 and became rather uniform (89 to 97 g/m 2 ) in organic 

 carbon contents from 0.5 to 1.99%. 



The percentage occurrence of each taxonomic group 

 in samples in each sediment organic content class is 

 presented in Table 30. 



A comparison of the similarities and differences be- 

 tween the macrobenthos of the New England region 

 and that of the Middle Atlantic Bight region in relation 

 to the environmental parameters described above is 

 contained in Sherman et al. (1988). 



Taxonomic Groups 



This section deals, in turn, with each taxonomic com- 

 ponent of the New England region macrobenthos ar- 

 ranged in the phvlogenetic order presented in Table 4. 

 Included for each taxon are general remarks relating 

 to overall abundance and frequency of occurrence, as 

 well as to aspects of the natural history of some of the 

 common forms encountered; these remarks are fol- 

 lowed by discussions dealing with geographic and bathy- 

 metric distribution and the quantitative relationship of 



