FIGURE 25. CB 138 Concentration 

 South and Central America 



50 



Cone, ng/g dry wt. 

 100 150 200 250 



300 



350 



MELM 



BEBC 

 COBC =§ 



a) ARAT 



■D 



5 ARRA ; 



ARPL 



c 

 o 



ra CHPA 

 W CHCO 

 CHLS 

 PEPA 

 PECA 

 COBT 

 PAPC 

 CRPZ 

 CREC 

 HOGF 

 MELV 

 MESF 

 MEPB 



53 



