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Hudson River Amphibian Preliminary Investigation Information Released. Date Posted: September 2, 2008 The Hudson River Natural Resource Trustees have released a Data Report and Fact Sheet for a preliminary investigation of amphibian breeding habitat and screening of breeding pool sediments for PCBs conducted in 2004 as part of the Hudson River Natural Resource Damage Assessment (NRDA). The Hudson River Natural Resource Trustees -- New York State, the U.S. Department of Commerce, and the U.S. Department of the Interior -- are working cooperatively to conduct the NRDA. This preliminary investigation confirms that Hudson River amphibians are exposed to PCBs. Further, based on this investigation, PCB levels in sediments from known amphibian breeding areas of the Hudson River are at ecologically significant levels, suggesting the potential for injury to these organisms. However, it does not appear that the Hudson River study area contains suitably sized populations of the target species, in particular the northern leopard frog, to use in a future field-based amphibian injury study focused solely on resident frogs. Accordingly, the Trustees are investigating additional options to assess amphibian injury, including the potential conduct of a laboratory-based injury study.
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