Main Title |
Method for Determining Gut Uptake Efficiencies of Hydrophobic Pollutants in a Deposit-Feeding Clam. |
Author |
Lee, H. ;
Boese, B. L. ;
Randall, R. C. ;
Pelletier., J. ;
|
CORP Author |
Environmental Research Lab.-Narragansett, Newport, OR. Mark O. Hatfield Marine Science Center. |
Publisher |
c1990 |
Year Published |
1990 |
Report Number |
EPA/600/J-90/073 ;ERLN-N073; |
Stock Number |
PB90-245549 |
Additional Subjects |
Clams ;
Carbon ;
Feces ;
Sediments ;
Intestines ;
Reprints ;
Macoma nasuta ;
Water pollution effects(Animals) ;
Hexachlorobenzenes ;
Biological availability ;
Pharmacokinetics
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB90-245549 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
7p |
Abstract |
Deposit-feeding invertebrates select particles for ingestion that are richer in organic carbon, and thus higher in pollutant concentration, than the mean values of bedded sediment. To estimate the ingested pollutant dose, a method was developed that uses the enrichment of the total organic carbon concentration (TOC) of the feces compared to the TOC of the bedded sediment as a measure of pollutant enrichment in the ingested particles. The deposit-feeding clam Macoma nasuta (Conrad) was exposed for 7 d in clamboxes to either bulk or fine sediment fractions that varied in TOC. Feces were collected and the TOC of sediment and feces estimated. The TOC of the feces was corrected for the carbon lost during digestion. The selectivity index (SI), the ratio between the corrected TOC of the feces and TOC of the bedded sediment, was determined to be 4.36 and 1.72 for the bulk and fine sediment fractions, respectively. The SI was then applied to data from a companion study in which M. nasuta was exposed to hexachlorobenzene (HCB) dosed sediment. The efficiency of gut uptake of HCB sorbed on ingested sediment ranged from 38 to 56%, with the lower value the more reliable. The effects of selection by deposit feeders for organically rich, high pollutant particles needs to be considered in experiments measuring the bioavailability of sediment-sorbed pollutants or in experiments attempting to determine the routes of pollutant uptake. |
Supplementary Notes |
Pub. in Environmental Toxicology and Chemistry, v9 p215-219 1989. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Method for Determining Gut Uptake Efficiencies of Hydrophobic Pollutuats in a Deposit-Feeding Clam. |
Category Codes |
68D; 47D |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/05 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
024228097 |
Origin |
NTIS |
Type |
CAT |