The PCBs, DDE, and mirex levels were measured in the subcutaneous fat and breast muscle of fifty-five waterfowl collected in New York State during 1981 and 1982. Levels were obtained by electron capture gas chromatography (EC-GC) on wet weight, dry weight, and lipid weight bases; results were confirmed by gas chromatography-mass spectrometry (GC-MS). The mean PCB levels were 6.1 (μg/g in fat and 0.25 μg/g in breast muscle on a wet weight basis. The mean DDE and mirex levels were 0.10 μg/g and 0.28 μg/g in fat and 0.01 μg/g and 0.002 μg/g in breast muscle on a wet weight basis, respectively.
The results of the present study confirm those of the previous study (Kimet al. 1984). The detailed comparison, however, shows that the levels of PCBs and DDE in fat continued to decline while the level of mirex increased slightly.