500 

 400 

 300- 

 200- 

 100- 

 0- 



< 



> 



w -ioo-\ 



? -2( 



GIANTS NECK • NOV 

 1980 



TEREDO NAVALIS 



Figure 12, 



EFFLUENT ■ NOV 

 980 



TEREDO NAVALIS 



AUG 1980 



BALANUS CRENATUS 



MAY 1980 



BALANUS CRENATUS 



AUG 1980 



MYTILUS EDULIS 



MAY 1980 



MYTILUS EDULIS 



-i 1 r 



2 3 4 



CUMULATIVE REPLICATES 



Trumpet diagrams of the upper and lower 95% confidence interval (CI), 

 expressed as a percent of the mean (%=(raean t CI/mean)X 100), and 

 plotted versus sample size, based on the average o.f 10 random samples 

 of six replicate panels at Giants Neck and Effluent. The data repre- 

 sents peak abundances of three species in 1980. 



