| http://www.w3.org/ns/prov#value | - But it is hard to detect problems in bigger channel catfish that store the residue in the muscle that people eat, said Fred Pinkney, a biologist for the U.S. Fish and Wildlife Service who analyzed Anacostia fish for the DDOE.???You could have a beautiful-looking channel catfish and it could be loaded with PCBs and other cancer-causing chemicals,??? he said.But up and down the 8.4-mile tidal river
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