jjg metal/gm tissue dry weight 
100 
Ni 
10.0 
-- U 
.0 
Cu 
I 
T I 
u 
Pb 
I 
L - 
U 
Cd 
Cr 
u 
u 
V 
u 
Zn 
I 
L U S J 
0.1 
L : Laboratory held animals at time = 0 
U : Animals held in unstressed area (Sta. 3, Fig. 3-1 ) 
for 4 week exposure 
S: Animals held in stressed area (Sta. 2, Fig. 3-1) 
for 4 week exposure 
1000 
100 
10.0 
.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 
