Effects of metal and organophosphate mixtures on Ceriodaphnia dubia survival and reproduction

  title={Effects of metal and organophosphate mixtures on Ceriodaphnia dubia survival and reproduction},
  author={Amy M. Mahar and Mary C. Watzin},
  journal={Environmental Toxicology and Chemistry},
The toxicity of mixtures of copper, zinc, and diazinon were determined for Ceriodaphnia dubia using 7‐d survival and reproduction tests. Fifteen treatments, including combinations of the chemicals at 0, 25, 50, 75, and 100% of their individual median lethal concentrations, adding up to one toxic unit (TU) were tested. The TU was then used to classify each mixture response as additive, greater than additive, or less than additive. For survival, additive responses occurred in the 75% zinc plus 25… 
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