CONTROL o 



0.01 ppm A 



0.1 ppm A 



1.0 ppm ■ 



90 120 



(mi n ut es ) 



180 



Figure 9-2. 48-hour Exposure: Comparison of Filtering Activity 

 of Mytilus edulis Exposed to W.A.F. No. 2 Fuel Oil. 



a> 

 o 



E 

 o 



T3 

 O) 



> 

 O 



E 

 oc 



« 



o 

 Q. 



60 90 120 



TIME (minutes) 



150 



180 



Figure 9-3. Two-week Exposure: Comparison of Filtering 

 Activity of Mytilus edulis Exposed to W.A.F. No. 2 Fuel Oil. 



117 



