PCBs AND OCPs IN FISH FROM LAKE BAIKAL, DELTA OF THE LENA RIVER AND BAUNT LAKES, RUSSIA

摘要

The PCBs and OCPs levels were investigated in valuable species of fish (family Coregonidae) from Lake Baikal, the delta of the Lena River and the Oron Lake (one of the Baunt Lakes). The mean levels of the organochlorine compounds in white-fish from Lake Baikal, the Lena River and Lake Oron were 94, 19 and 36 ng/g lipids for indicator PCBs, 120, 32 and 46 ng/g lipids for DDT and its metabolites, 2.9, 3.4 and 5.8 ng/g lipids for α- and γ-HCHs, and 20.4, 4.5 and 7.3 ng/g lipids for TNCL, accordingly. The levels of the organochlorines did not exceed Russian sanitary standards for freshwater fish for consumption by adult (SanPiN 2.3.31078-01). But DDT levels in some white-fish from Lake Baikal exceeded sanitary standards for primary products for the preparation of food for children. The organochlorines levels in fish from the Lena River are comparable to the levels in fish from other regions of Russian Arctic. A decrease in the levels of DDT and its metabolites was found in fish from Lake Baikal during the last decade. No marked decrease in the levels of other organochlorines was observed in Lake Baikal fish.