100 



•o 

 (/> 



E 



"o 

 <u 



E 



CP 



=4. 



10.0 



Ni 



-- u 



Cu 



I 



J 



Pb 



I 



L - 

 U 



Cd 



Cr 



V 



L: Laboratory held animals at time = 



L): Animals held in unstressed oreo (Sta. 3, Fig. 3-1 ) 

 for 4 week exposure 



S: Animals held in stressed area (Sta. 2, Fig. 3-1) 

 for 4 week exposure 



Zn 



I 



l"sj 



1000 



100 



10.0 



1.0 



Note: Bar lines, when present, indicate one standard deviation on either side 

 of the mean; otherwise total range is indicated. 



Figure 3-4. Metal levels in Mytilus edulis introduced into 



stressed and unstressed environments, Narragansett Bay, Rl, 



September-October, 1976. 



32 



