Abstract
The detection of high levels of mirex in Lake Ontario fish has raised many questions regarding the utilization of this fishery for the present and future. Continuous monitoring programs, including trend analysis, are presently being conducted, but whether salmonids such as lake trout, Salvelinus namaycush, can effectively eliminate mirex is not known. IVIE et al. (1974) found that mosquito fish (Gambusia affinis) fed a diet containing 50 ppm mirex for 15 days contained 24 ppm mirex after that period. After being placed on clean feed for 130 days, the residues had dropped to 13 ppm, and the researchers reported that the half-life was, therefore, 130 days. LOWE et al. (1971) reported that the body burden of mirex in pinfish (Lagodon rhomboides) dropped from 30-40 ppm to 18 ppm after an elimination time of 56 days.
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