BIOCONCENTRATION FACTORS FOR PETROLEUM-HYDROCARBONS, PAHS, LABS AND BIOGENIC HYDROCARBONS IN THE BLUE MUSSEL

Bioconcentration factors (K(bc)) for petroleum hydrocarbons, PAHs, LABs and biogenic hydrocarbons in Mytilus edulis were measured in field experiments using time-integrating water samplers. Seven deployments at five sites gave lipid weight K(bc)s for total hydrocarbons ranging from 0.99 x 10(6) to 3.1 x 10(6) (mean 1.6 x 10(6))-a narrower range than has been obtained previously. Bioconcentration factors for the PAHs were similar to those for total hydrocarbons where the major hydrocarbon source was oil. However, at other sites the factors for PAHs were an order of magnitude lower than those for petroleum and for hydrocarbons originating from algae. Compositional profiles for the linear alkyl benzenes (LABs) suggested that these compounds were assimilated primarily from the dissolved phase, despite their greater abundance on particles.