150 



CO 







'"§ 100 



(D 



50 



Hg 



0.0 0.4 0.8 1.2 1.6 2.0 



Concentration ((ig/g-dry) 

 Arithmetic scale 



CO 





 .Q 



tCdane 



t r 



40 80 120 160 200 



Concentration (ng/g-dry) 

 Arithmetic scale 



Mean Concentration 

 0.094 |ug/g-dry 



High Concentration 

 0.24 |ag/g-dry 



0.0006 0.016 0.40 



100 



Concentration (ng/g-dry) 

 Logarithmic scale 



CO 

 CD 



- t— ■ 



CO 



H — 



o 



CD 

 _Q 



Mean Concentration 

 14 ng/g-dry 



High Concentration 

 31 ng/g-dry 



1.3 



6.3 



32 



160 



Concentration (ng/g-dry) 

 Logarithmic scale 



Figure 3. Distributions of mercury and total chlordane concentrations in mollusks on arithmetic 

 and logarithmic scales. 



13 



