Сoncentrations of HCHs (α-, β-, γ-) and DDT and its metabolites (DDD and DDE) were determined in organs of
the pink (Oncorhynchus gorbuscha), chum (O. keta), chinook (O. tshawytscha), and sockeye (O. nerka), which
caught from the natural aquaculture region of Russia (near the Kuril Islands (the northern-western part of the
Pacific Ocean), the Sea of Okhotsk and the Bering Sea).