An Assessment of Salinity Effects on the toxicity of Atrazine to Chesapeake Bay Species_Data Needs f
- Published:
- March 1, 1994
- Originator:
- Chesapeake Bay Program
this study was designed to determine the influence of a range of salinities (5, 15 and 25 ppt) on the acute toxicity of atrazine to the copepod, Eurytemore affinis and the sheepshead minow larvae, Cyprinodon variegatus. An additional objective of the study was to provide acute atrazine toxicity data for E. affinis to fill a data requirement for development of an estuarine water quality criterion. Niney-six hour LC50 values for the copepod were 0.5, 2.62 and 13.2 mg/L at salinities showed a statistical difference between 15 and 25 ppt but not between 5 and 15 ppt.