Long-Term Trends in the Concentrations of Legacy Persistent Organochlorine Pollutants in Whole-Body Samples of Bottomfeeding Fish from Six Large River Monitoring Stations in Kansas

2018 
Although persistent organic pollutants (POPs) in bottom-feeding fish have been monitored for decades in Kansas, no information regarding long term trends has been published. Therefore, in this study we examined fish tissue data collected from six long-term, large-river, fish tissue monitoring stations in Kansas for trends in POP concentrations. Based on the findings we also forecasted future persistence and discussed the practical implications of our findings. The data we examined consisted of whole-body composited multi-fish samples collected over periods spanning 21–33 years. Common carp was the target species, but occasionally other bottom-feeding species were substituted when necessary. The sample constituents examined were dieldrin, technical chlordane, dichlorodiphenyltrichloroethanes (DDTs), and polychlorinated biphenyls (PCBs). Constituent data were normalized by lipid content prior to analysis, however, because lipid content was not measured during certain time periods, multiple imputation (MI) a...
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