| 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
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB91-146324 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| 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 |
