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RECORD NUMBER: 5 OF 5

OLS Field Name OLS Field Data
Main Title Toxicity of Vertical Sediments in the Trenton Channel, Detroit River, Michigan, to 'Chironomus tentans' (Insecta: Chironomidae).
Author Rosiu, C. J. ; Giesy, J. P. ; Kreis, R. G. ;
CORP Author Environmental Research Lab.-Duluth, MN. ;Michigan State Univ., East Lansing. Pesticide Research Center.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/346;
Stock Number PB90-216292
Additional Subjects Toxicity ; Diptera ; Sediments ; Larvae ; Bioassay ; Invertebrates ; Tables(Data) ; Great Lakes Region ; Reprints ; Water pollution effects(Animals) ; Chironomus tentans
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB90-216292 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/27/1990
Collation 12p
Abstract
The objective of the study was to determine the effects of sediment from various sediment core depths on survival and weight gain of larvae of the dipteran midge, Chironomus tentans, during 10-d laboratory exposures. Sediment cores were collected from 12 sites in the Trenton Channel of the Detroit River in 1987 and sectioned into 5-cm intervals to a depth of 25 cm. Percent reductions in larval weight gain, relative to that in control sediment, were calculated for each interval. Two sites were classified as very toxic, three sites as toxic, three sites as slightly toxic, and four sites as good quality benthic habitat. The utility of sediment core toxicity profiling and the C. tentans bioassay for three-dimensional sediment quality assessment are discussed, as well as comparisons between the results of laboratory assays and field surveys of benthic macroinvertebrates. The assay results are used to estimate the volume of toxic sediment at eight sites and determine the costs of dredging and disposal of the toxic sediments. Preliminary estimates of remedial actions were developed to achieve several levels of mitigation of the toxicity of sediment to macrozoobenthic populations in the Trenton Channel.