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OLS Field Name OLS Field Data
Main Title Acute Toxicity of Aqueous and Substrate-Bound Copper to the Midge, 'Chironomus decorus'.
Author Kosalwat, P. ; Knight, A. W. ;
CORP Author California Univ., Davis. Dept. of Land, Air and Water Resources.;Corvallis Environmental Research Lab., OR.;Lawrence Livermore National Lab., CA.
Publisher c1987
Year Published 1987
Report Number EPA/600/J-87/541;
Stock Number PB91-146324
Additional Subjects Toxicity ; Copper ; Chemical water pollution ; Dose-response relationships ; Larvae ; Environmental monitoring ; Bioassay ; Reprints ; Chironomus decorus
Library Call Number Additional Info Location Last
NTIS  PB91-146324 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/13/1991
Collation 10p
Abstract Fourth instar larvae of the midge, Chironomus decorus, were exposed to copper in water and copper in food and substrate (bound forms). Copper present in aqueous forms was more toxic than when it was present in bound forms. The relationship between copper in water and copper in midges could be described by an exponential equation while the relationship between copper in substrate and midges was best described by a simple linear regression equation. Midge larvae accumulated copper from water and possessed some mechanisms to regulate copper uptake and excretion when exposed to copper concentrations of 0.05-1.0 mg/L(aqueous forms) and lost that ability when the concentration exceeded 1.0 mg/L. On the contrary, the midge larvae were unable to accumulate copper from food, since the estimated bioconcentration factor was between 0.10 and 0.16. When the midge larvae were exposed to copper in water, the uptake rate increased rapidly from 0-10 hr and then the rate increased very slowly or in some cases it reached a steady state after 10 hr. The steady state was attained within 1 to 3 hr when the midges were exposed to copper in food and substrate. (Copyright (c) Springer-Verlag New York Inc.)
Supplementary Notes Pub. in Archives of Environmental Contamination and Toxicology, v16 p275-282 1987. See also PB91-146332. Sponsored by Corvallis Environmental Research Lab., OR., and Lawrence Livermore National Lab., CA.
NTIS Title Notes Journal article.
Title Annotations Reprint: Acute Toxicity of Aqueous and Substrate-Bound Copper to the Midge, 'Chironomus decorus'.
Category Codes 68D; 57Y; 57H
NTIS Prices PC A02/MF A01
Primary Description 600/02
Document Type NT
Cataloging Source NTIS/MT
Control Number 109130609
Origin NTIS
Type CAT