Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Automated Device (AGARS) for Studying Avoidance of Pollutant Gradients by Aquatic Organisms.
Author Cripe, C. R. ;
CORP Author University of West Florida, Pensacola. Dept. of Biology.;Environmental Research Lab., Gulf Breeze, FL.
Year Published 1978
Report Number EPA-R-804458; EPA/600/J-79/003;
Stock Number PB-294 863
Additional Subjects Marine fishes ; Aquatic animals ; Water pollution ; Toxicity ; Chlorine ; Avoidance responses ; Animal behavior ; Monitoring ; Exposure ; Concentration(Composition) ; Near infrared radiation ; Bioassay ; Canada ; Water analysis ; Chemical analysis ; Laboratory equipment ; Reprints ; Aquatic gradient avoidance response system ; Water pollution detection ; GAARS system
Library Call Number Additional Info Location Last
NTIS  PB-294 863 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 9p
Most apparatus designed to detect avoidance of pollutants by aquatic organisms require visual observations of test organisms in steep pollutant gradients. GAARS (Aquatic Gradient Avoidance Response System) was developed to eliminate these limitations. This system allows animals to choose between one uncontaminated zone and three increasingly toxic zones in a gradient trough that is monitored for extended time periods by infrared light sources, sensors, and a microprocessor. Data are accumulated hourly and processed by a paper tape reader/calculator/plotter system that records the time test animals remain in each zone and compares behavior before and during test exposures. Initial tests indicate that pinfish (Lagodon rhomboides) tested in the apparatus will avoid chlorine-produced oxidants at concentrations of 0.02-0.04 mg/L.