Abstract
The analysis of PCB patterns in livers of immature dabs, livers of mature male as well as livers and ovaries of mature female specimens revealed significant differences in the accumulation of single PCB congeners. Each of the examined tissues exhibited a specific PCB pattern. Lipid content or geographic origin did not decisively influence the qualitative composition of PCB-compounds but only their concentration. Pentachlor- to decachlorbiphenyls with 4,4′-chlorine substitution or with three ortho-chlorines are accumulated in the liver of adult dabs. Depletition of lipids from the female liver during ovary maturation is an important excretory pathway of PCBs and HCB during spawning. The 2,3,4-chlorine substitution on an aromatic ring is responsible for the phenomenon of preferential transfer of hexachlorinated aromatic chemicals from female livers to ovaries.
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