1000 



100 — 



X 

 L±J 



>- 



Q. 



a. 



10 — 



1.0 — 



0.1 



A 



f 



Um DIRTY MERCENARIA 

 ^Zn CLEAN MERCENARIA 



A UNDEPURATED 



B DEPURATED 



B 



t 



A 



\A 



B 



f 



ft 



A 



I 



B 



I 



f 



B 



I- 



f 



B 



I 



Cd 



Cu Ni Pb 



MERCENARIA 



Ti 



Figure 3-2. Metal levels in indigenous Mercenaria mercenaria from 

 clean and polluted parts of Narragansett Bay, Rl. 



Note: Range shown is one standard deviation on either side of the mean. 



The mussels used in this study were collected at one time immediately south of 

 Popasquash Point, Narraganasett Bay, R.I. (Figure 3-1), and held in a 

 laboratory flow-through system for six days prior to the first deployment. 



29 



