Fishes - metabolism, Polychlorinated Biphenyls - pharmacology, Water Pollutants, Chemical - pharmacology, Oxidoreductases - drug effects, Environmental Monitoring - methods, Dioxins - pharmacology, Male, Polycyclic Compounds - pharmacology, Cytochrome P-450 Enzyme System - drug effects, Animals, Cytochrome P-450 Enzyme System - biosynthesis, Enzyme Induction...