Hudson River Fish Evolve Toxic PCB Immunity

National Geographic: Bottom-feeding fish in the Hudson River have developed a gene that renders them immune to the toxic effects of PCBs, researchers say. A genetic variant allows the fish to live in waters notoriously polluted by the now-banned industrial chemicals, and distinguishes the fish--Atlantic tomcod (Microgadus tomcod)--as one of the world’s fastest evolving populations. "This is very, very ra­­­­­­­­­­­­pid evolutionary change," said Isaac Wirgin, an environmental toxicologist at New York University’s......

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