Table 8 . Characteristics of the aliphatic hydrocarbon fraction of 

 oysters Cracsostrea gigas from reference stations and 

 from two estuaries contaminated with Amoco Cadiz oil 



Date/Sample 



December 1980 (9) 



Pristane/Phytane 



Carbon Prefer- 

 Alkanes/Isoprinoids ence Index 



(C 26" C 30 ) 



Rade de Brest (reference) 

 Aber Benoit 

 Aber Wrac'h 



April 1979 (13) 



Rade de Brest (reference) 

 Aber Benoit 

 Aber Wrac'h 



August 1979 (17) 



He Tudy (reference) 

 Baie de Morlaix (reference) 

 Aber Benoit 

 Aber Wrac'h 



February 1980 (23) 



Rade de Brest (reference) 

 Aber Benoit 

 Aber Wrac'h 



June 1980 (27) 



Rade de Brest (reference) 

 Aber Benoit 

 Aber Wrac'h 



0.15 

 0.61 

 0.56 



0.63 

 0.62 

 0.21 



ND 



ND 



NS 



0.28 



ND 



ND 



0.23 



ND 

 0.18 

 1.68 



2.34 

 0.18 

 0.07 



0.12 

 0.13 

 1.00 



5.15 



ND 



NS 

 0.'48 



4.37 

 1.30 

 0.81 



2.64 

 0.28 

 0.19 



1.27 



2.0 



1.57 



1.16 



ND 



1.10 



1.39 

 0.93 



NS 



ND 



1.00 



1.02 



ND 



1.10 

 0.61 

 0.93 



294 



