SCHWARTZ AND PORTER FISHES. MACROINVERTEBRATES OFF NORTH CAROLINA 



low plankton fauna existed over the scallop beds, 

 except during June and late October, when indica- 

 tions of a late spring and early fall bloom occurred 

 (Figure 5). 



Twenty-two sediment samples were taken dur- 

 ing the 1972 study (Figure 3). Of these, seven were 

 deliberately taken in areas where no scallops were 

 collected by the fishery (Table 3). As the sediments 

 were taken immediately after a trawl tow, they 



may not be representative of the same bottom cov- 

 ered during the tow. No discernible differences 

 were found between sediments from scallop pro- 

 ducing and nonproducing areas (Table 3, Figure 

 2). 



Newton et al. (1971, Sediment Distribution 

 Chart No. 2) characterized the area which was 

 later encompassed by the 1972 commercial scallop 

 fishery (Figures 3, 4) as consisting of two sediment 



TABLE 3. — Sediment size analyses, data listed as percent per sample, sediment sorting coefficients, skewness, for 

 scallops sampled in 1972 from producing and nonproducing areas off North Carolina. 



'See Morgans (1956) for definition 

 2 Not determined 



433 



