Record Display for the EPA National Library Catalog


Main Title Increased Toxicity of Ammonia to Rainbow Trout 'Salmo gairdneri' Resulting from Reduced Concentrations of Dissolved Oxygen.
Author Thurston, Robert V. ; Phillips, Glenn R. ; Russo, Rosemarie C. ;
CORP Author Montana State Univ., Bozeman. Fisheries Bioassay Lab.;Environmental Research Lab.-Duluth, MN.
Year Published 1981
Report Number EPA-R-800861 ;EPA-R-803950; EPA-600/J-81-587;
Stock Number PB83-131177
Additional Subjects Ammonia ; Toxicology ; Fishes ; Oxygen ; Reprints ; Salmo gairdneri ; Water pollution effects(Animals)
Library Call Number Additional Info Location Last
NTIS  PB83-131177 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
The median lethal concentration (LC50) of aqueous ammonia at reduced dissolved oxygen (D.O.) concentrations was tested in acute toxicity tests with rainbow trout (Salmo gairdneri) fingerlings. Fifteen 96-h flow-through tests were conducted over the D.O. range 2.6-8.6 mg/L, the former concentration being the lowest at which control fish survived. There was a positive linear correlation between LC50 (milligrams per liter un-ionized ammonia) and D.O. over the entire D.O. range tested; ammonia toxicity increased as D.O. decreased. Ammonia LC50 values were also computed for 12, 24, 48, and 72 h; the correlation with D.O. was greater the shorter the time period.