Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Toxicity of Pentachlorophenol to Aquatic Organisms under Naturally Varying and Controlled Environmental Conditions.
Author Hedtke, S. F. ; West, C. W. ; Allen, K. N. ; Norberg-King, T. J. ; Mount, D. I. ;
CORP Author Environmental Research Lab.-Duluth, Monticello, MN. Monticello Ecological Research Station.
Year Published 1986
Report Number EPA/600/J-86/466;
Stock Number PB88-224977
Additional Subjects Toxicity ; Toxicology ; Concentration(Composition) ; Invertebrates ; Fishes ; Reproduction(Biology) ; Reprints ; Water pollution effects(Animals) ; Phenol/pentachloro ; Toxic substances ; Aquatic organisms
Library Call Number Additional Info Location Last
NTIS  PB88-224977 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 12/29/1988
Collation 14p
The toxicity of pentachlorophenol (PCP) was determined in the laboratory for 11 aquatic species. Tests were conducted seasonally in ambient Mississippi River water and under controlled conditions in Lake Superior water. Fifty-one acute toxicity tests were conducted, with LC50 values ranging from 85 micrograms/L for the white sucker Catastomus commersoni during the summer to greater than 7,770 micrograms/L for the isopod Asellus racovitzai during the winter. The effect of PCP on growth and/or reproduction was determined for seven species. The most sensitive chronically exposed organisms were the cladoceran Ceriodaphnia reticulata and the snail Physa gyrina. The greatest variation in toxicity was due to species sensitivity. Within a given season there was as much as a 40-fold difference in LC50 values between species. For any one species, the maximum variation in LC50 between seasons was approximately 14-fold. There were also substantial differences in acute-chronic relationships, with acute/chronic ratios ranging from greater than 37 for C. reticulata to 1 for Simocephalus vetulus. It is suggested that the composition of the aquatic community should be the most important consideration in estimating the potential environmental effects of PCP.