Short-Term Toxicity of Seven Chemicals Using the Fathead MInnow, Pimephales promelas or the Cladoceran Ceriodaphnia dubia
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Seven-day acute renewal toxicity_ tests were conducted using the fathead minnow (Pimephales promelas) or a cladoceran (Ceriodaphnia dubia) by exposing them to several concentrations of either ammonia, aniline, methyl parathion, carbaryl, copper, lead or cadmium. The toxicity tests generated median. lethal concentration values at various intervals of exposure and determined concentrations of the chemicals producing negative effects on reproduction and growth. The tests were conducted at the University of Wisconsin-Superior (UW S) testing facilities according to procedures recommended by the American Society for Testing and Materials (ASTM 1993) and the U.S. Environmental Protection Agency (EPA 1989).