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Killifish survive polluted waters thanks to genes from another fish

from The Scientist

The population of Gulf killifish in the Houston Ship Channel had been steadily declining for decades, likely a result of the toxins pouring in from industrial activity, when suddenly and mysteriously, in the 1970s, it started trending upwards. The waters hadn't changed. Over the past six decades, the activity of several refineries and a petrochemical complex has led to large concentrations of halogenated and polycyclic aromatic hydrocarbons that are known to disrupt cardiac development — often lethally — in invertebrates. more

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