Spatial and temporal variation in organochlorine contaminants in the Antarctic minke whales, Balaenoptera bonaerensis
نویسندگان
چکیده
To evaluate environmental changes in the Antarctic Ocean, concentrations of organochlorines (PCBs, DDTs, HCHs, HCB and CHLs) were determined in the blubber of the mature males of Antarctic minke whales, Balaenoptera bonaerensis, (from 21 to 25 years) from the Antarctic Areas IV and V. The ranges of concentrations for each compound were, in ng/g fat wt: PCBs, 7.7-89; DDTs, 29-340; HCHs, 0.20-4.3; HCB, 75-430; CHLs, 10-120. Residue levels of PCBs, and DDTs in blubbers of Antarctic minke whales from the Antarctic Ocean were apparently lower than those levels of the other baleen whales from the middle latitude areas. Regional significant differences between the Areas IV and V were observed in PCBs, HCHs, HCB and CHLs levels in mature male of Antarctic minke whales. And also, their HCHs and HCB levels significantly decreased during 1988/89 and 2002/03 seasons in the Areas IV and V. Yearly changes of PCBs and DDTs were unclear during 1988/89 and 2002/03 seasons.
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