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RECORD NUMBER: 3 OF 130

OLS Field Name OLS Field Data
Main Title Acute Toxicity of Ammonia to Rainbow Trout.
Author Thurston, R. V. ; Russo, R. C. ;
CORP Author Montana State Univ., Bozeman. Fisheries Bioassay Lab.;Environmental Research Lab.-Duluth, MN.
Year Published 1983
Report Number EPA-R-803950; EPA-600/J-83-155;
Stock Number PB84-172444
Additional Subjects Ammonia ; Toxicology ; Fishes ; Reprints ; Rainbow trout ; Salmo gairdneri ; Water pollution(Animals)
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB84-172444 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 11p
Abstract
The acute toxicity of ammonia to hatchery-reared rainbow trout Salmo gairdneri was measured in 86 flow-through tests, 96 hours to 35 days long. Fish ranged in age from 1-day-old fry (<0.1 g) to 4-year-old adults (2.6 kg). The 96-hour median lethal concentrations (96-hour LC50) ranged from 0.16 to 1.1 mg/l un-ionized ammonia (11 to 48 mg/l total ammonia-nitrogen). Susceptibility to ammonia decreased as the fish developed from sac fry to juveniles, and increased thereafter. Acute toxicity decreased as temperature increased over the range 12 to 19C. No significant differences in toxicity were observed in tests with different ammonium salts. The LC50 values obtained for 12- and 35-day tests were not appreciably different from those for tests of shorter time periods.