Do PCBs in PFBC stocked trout dissipate once they are stocked in the streams?
These levels might diminish over time, but since PCBs accumulate in tissue over a period of time, they take a similarly long time to dissipate. The trout stocked from PFBC fish culture stations are fully-grown adult fish. Unless they have major growth in body weight after being stocked or they lose a lot of fatty tissue, it is unlikely that the amount (a fraction of one part per million) of PCBs in their tissue will change significantly during the relatively short time they remain in the streams into which they are stocked.
