Technical Report 120

Fish chronic toxicity data

Fish chronic data are presented in Figure 5. More data are available for low solubility MoA 1 chemicals, perhaps due to a lack of acute narcosis with such substances. The chronic intercept is decreased by approximately 0.5 log units versus fish acute data (to -2.65 from -2.22), which is consistent with chronic effects occurring at lower concentrations. Interpretations of plots for MoA 2, as well as MoA 3 and 4 are not possible due to a lack of availability of high quality data.