These results indicate that there is no influence
of mixed pesticides on the BCF of these
individual organophosphorous pesticides. This
result was the same as that in the bioconcentration
of diazinon, fenthion and fenitrothion
in our previous study (Tsuda et al., 1995). For
organochlorine pesticides, Veith et al. (1979)
concluded that there was little difference in the
BCF of p,p’-DDE and heptachlor epoxide for
fathead minnows between individual and mixed
pesticides. A similar conclusion was therefore
obtained for organophosphorous and