Record Display for the EPA National Library Catalog


Main Title Statistical Approach to Predicting Chronic Toxicity of Chemicals to Fishes from Acute Toxicity Test Data (for Microcomputers).
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Publisher Jun 92
Year Published 1992
Report Number EPA/SW/DK-92/047;
Stock Number PB92-503119
Additional Subjects Software ; Water pollution effects ; Fishes ; Toxicity ; Chemical compounds ; Diskettes ; Least squares method ; Exposure ; Concentration(Composition) ; Time series analysis ; Statistical analysis ; Fishkill ; Mortality ; Fish physiology ; Risk assessment ; Aquatic ecosystems ; Multifactor probit analysis
Library Call Number Additional Info Location Last
NTIS  PB92-503119 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 1 diskette
A methodology was developed to predict chronic toxicity based on acute data. The method is called Multifactor Probit Analysis (MPA) and uses the iteractive reweighed least squares method to estimate parameters of the probit surface. The independent variables are time of exposure and probit of the proportion responding to a concentration. MPA allows the user to predict the concentration of toxicant at any time and percent mortality, LC t,p. MPA calculates a point estimate and a measure of dispersion (95% Confidence limits). The MPA is versatile, entirely menu-driven and offers 7 probit models and transformation combinations of the independent variables.