Record Display for the EPA National Library Catalog

RECORD NUMBER: 5 OF 28

OLS Field Name OLS Field Data
Main Title Chronic Effects of 2,2'-Dichlorobiphenyl on Reproduction, Mortality, Growth, and Respiration of 'Daphnia pulicaria'.
Author Bridgham, S. D. ;
CORP Author Minnesota Univ., Minneapolis. Dept. of Ecology and Behavioral Biology.;Environmental Research Lab.-Duluth, MN.
Publisher c1988
Year Published 1988
Report Number EPA-R-810775; EPA/600/J-88/456;
Stock Number PB90-147638
Additional Subjects Toxicity ; Exposure ; Respiration ; Mortality ; Growth ; Graphs(Charts) ; Tables(Data) ; Lifespan ; Reprints ; Polychlorinated biphenyl compounds ; Daphnia pulicaria ; Dichlorobiphenyl ; Dose-response relationships ; Water pollution effects(Animals)
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-147638 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/15/1990
Collation 11p
Abstract
Previous studies have shown toxic effects of polychlorinated biphenyls (PCBs) on aquatic life only in the micro g/L range, well above normal ambient concentrations. Daphnia pulicaria was isolated from Lake Erie and exposed to 50 ng/L to 10 micro g/L of 2,2'-dichlorobiphenyl (DCB) in lifetable and physiological studies. Reproduction, mortality, growth, and respiration were measured for periods up to the entire lifespan of the animal with and without the use of an organic surfactant. Significant mortality and inhibition of reproduction were found at levels as low as 50-100 ng/L in lifetable studies, and no safe level could be determined. A unique, yet repeatable, dose-response curve occurred in lifetables with maximum inhibition at low to intermediate concentrations. Inhibition at the highest level tested, 10 micro g/L, occurred only after continuous exposure for three generations. Increasing concentrations of CBD stimulated growth, while respiration experiments yielded variable results. (Copyright (c) 1988 Springer-Verlag New York, Inc.)