||Effect of Chronic Exposure to EPN and to Guthion on the Critical Swimming Speed and Brain Acetylcholinesterase Activity of 'Cyprinodon variegatus'.
Cripe, G. M. ;
Goodman, L. R. ;
Hansen, D. J. ;
||Environmental Research Lab., Gulf Breeze, FL.
Water pollution ;
Phosphorus organic compounds ;
Life cycles ;
Cyprinodon variegatus ;
Sheepshead minnows ;
EPN insecticide ;
Phosphonothioic acid/(ethyl-ester)-(nitrophenyl-ester)-phenyl ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Swimming performance of the Sheepshead minnow, Cyprinodon variegatus, was measured in a stamina tunnel at the end of life-cycle toxicity tests with the organophosphate pesticides, EPN and Guthion. Swimming stamina was affected by 2.2 micrograms EPN/l but not by 0.88 micrograms EPN/l; these concentrations are about one half of those that significantly affect survival, growth or reproduction. Fish brain acetylcholinesterase (AChE) activity, assayed by the pH-Stat method, was inhibited 72% by 0.88 micrograms EPN/l and 83% by 2.2 micrograms EPN/l. Swimming performance was not affected by Guthion concentrations up to 0.5 micrograms/l; this concentration reduced survival and inhibited AChE 78%.
||Pub. in Aquatic Toxicology 5, p255-266 Aug 84.
|NTIS Title Notes
||Reprint: Effect of Chronic Exposure to EPN and to Guthion on the Critical Swimming Speed and Brain Acetylcholinesterase Activity of 'Cyprinodon variegatus'.
|PUB Date Free Form
||6C; 6T; 6F; 68D; 57Y; 57Z; 57P
||Not available NTIS