12- 



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 o ^ 



ra 



X North Dumpling 



• D I 



o D II 



A Dill 



Mytilus eduljs 



X 



A 



X 



i 



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Cu 



1- """x"""" """"rrTiTsr"^""^"""^ 



■ 11 



8 



I I I i I 



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 '7 7 



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12 2 



'78 



Figure 10. Temporal variation in the ratios of heavy metals in Mytilus edulis from 



refe encrsTJS °R-^ ''i"'' °^'"°" '"'^ °^^^* " weTflT^ortFWmpl i ng . a 

 bfseliSe data ^'^°''^" lines represent the 95X confidence limits of the 



