||Toxicity of Ammonia to Early Life Stages of the Smallmouth Bass at Four pH Values.
Broderius, S. ;
Drummond, R. ;
Fiandt, J. ;
Russom, C. ;
||Environmental Research Lab.-Duluth, MN.
Water pollution ;
Life cycles ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||Early life stages of smallmouth bass (Micropterus dolomieui Lacepede) were exposed to ammonia concentrations at four different pH values (from 6.5 to 8.7). Acute lethal tests were conducted with juveniles, and partial chronic tests were initiated at the late embryo stage and extended through 32 d of exposure. The 96-h LC50 ammonia concentrations at pH 6.53, 7.16, 7.74 and 8.71 were 371, 117, 39.5 and 7.43 mg/l total ammonia-N (NH3-N) and 0.694, 1.00, 1.20 and 1.78 mg/l un-ionized NH3, respectively. The acute toxicity of ammonia in terms of NH3-N was directly related to test pH, and in terms of NH3 was inversely related to pH.
||Pub. in Jnl. of Environmental Toxicology and Chemistry, v4 p87-96 1985.
|NTIS Title Notes
||Reprint: Toxicity of Ammonia to Early Life Stages of the Smallmouth Bass at Four pH Values.
|PUB Date Free Form
||6C; 6T; 68D; 57Z; 57Y
||PC A02/MF A01