- 37.5 
x 
a 
CL 
O 
o 
200 - 
5 150 - 
o 
E 
a 
100 - 
- 12.5 
25 50 
Copper (jug L' 1 ) 
Figure 3. Percent mortality after 21-day exposure to copper 
compared to the concentration of copper in the high-molecular- 
weight protein fraction. 
113 
Mortality (%) 
