Contaminant concentrations in freshwater fish and birds were periodically measured. Fish were selected for monitoring aquatic ecosystems because of their tendency to accumulate pesticides and other contaminants. The U.S. Fish and Wildlife Service participated in a program to monitor the concentrations of pesticides and other long-lived toxic contaminants in all segments of the environment. C.E. Puckett, P.D. Doran, and M.J. Mac, eds. Accuracy depends on the accuracy of the individual datasets.
Methodology varies for each individual dataset.
Process varies for each individual dataset. Based on local reference names. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a U.S. Geological Survey server, and not indirectly through other sources which may have changed the data in some way.