The report, published in the current issue of Fish & Shellfish Immunology, adds to a growing body of research pointing to problems with estrogen in the nation's waterways.
Other research has found evidence of estrogen exposure in freshwater and some marine fish populations. In a previous report, USGS scientists found widespread occurrences of fish in the Potomac and Shenandoah rivers with "intersex" characteristics -- male fish carrying immature female egg cells in their testes. Other scientists observed similar problems in fish in Southern California and in labs in Canada and the United States.
Scientists have not targeted the source of estrogen, but many suspect it stems from certain pollutants and drugs in waterways.
(Via The Keyhoe Report.)
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