KAPLAN, WELKER, and KRAUS: EFFECTS OF DREDGING 



Table 7. — A comparison ofMercenaria populations in four selected areas of Goose Creek before and after dredging. 



times at another, with levels of 542, 918, and 348 

 MPN/100 ml. These readings appear to exceed 

 the 10% limit mentioned above and may be suf- 

 ficient grounds for closing the bay to clamming. 

 The densities of presumptive human fecal coli- 

 forms found by Nuzzi correlated with increases 

 in human population size, suggesting that the 

 increase in number of homes around the periphery 

 of the bay during the 1968-1972 will further 

 increase the contamination of clams beyond 

 acceptable sanitary standards. 



ANALYSIS OF THE EFFECTS OF 



DREDGING ON MACROBENTHIC 



ANIMAL POPULATIONS 



Dry weights from 263, 0.1 m^ samples collected 

 from the bottom of Goose Creek over 22 mo were 

 compared by means of analysis of variance. In 

 addition, chi-square analyses were performed to 

 determine whether or not significant differences 

 existed between pre- and post-dredging popula- 

 tions in number of individuals and species. All 



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