Record Display for the EPA National Library Catalog


Main Title Effects of Lowered Dissolved Oxygen Concentration on the Toxicity of 1,2,4-Trichlorobenzene to Fathead Minnows.
Author Carlson, A. R. ;
CORP Author Environmental Research Lab.-Duluth, MN.
Year Published 1987
Report Number EPA/600/J-87/083;
Stock Number PB88-123922
Additional Subjects Aeration ; Oxygen ; Dissolved gases ; Fishes ; Bioassay ; Reprints ; Benzene/trichloro
Library Call Number Additional Info Location Last
NTIS  PB88-123922 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
Fathead minnows Pimephales promelas were exposed for 32 days, starting with embryos and continuing through early juvenile development, to five concentrations of 1,2,4-trichlorobenzene (1,2,4-TCB) with a control. Each series of treatments was completed at three dissolved oxygen (DO) concentrations: 8.1 (near air saturation), 5.6 and 4.5 mg/liter. For fish exposed to a mean toxicant concentration of 920 micrograms/liter at 8.1 mg/liter DO mean survival and mean weight was less than in controls. At the comparable toxicant concentration at 5.6 mg/liter DO, survival and growth of test fish were not statistically different (P = 0.95) from those of control fish. At the comparable mean toxicant concentration of 920 micrograms/liter at 4.5 mg/liter OD, more marked toxic effects on survival and growth occurred. No toxic effects on survival, growth, and bioconcentration were evident at 500 microrams/liter 1,2,4-TCB or lower concentrations.