Record Display for the EPA National Library Catalog


Main Title Effects of soluble fractions of drilling fluids and hexavalent chromium on the development of the crabs, Rhithropanopeus harrisii and Callinectes sapidus /
Other Authors
Author Title of a Work
Bookhout, Cazlyn Greer,
Publisher U.S. Environmental Protection Agency, Environmental Research Laboratory ; Center for Environmental Research Information [distributor],
Year Published 1982
Report Number EPA/600-S3-82-018
OCLC Number 09472175
Subjects Drilling muds--Environmental aspects
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-S3-82-018 In Binder Headquarters Library/Washington,DC 11/14/2018
ELBD ARCHIVE EPA 600-S3-82-018 In Binder Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
Collation 7 pages : illustrations ; 28 cm
Caption title. At head of title: Project summary. "June 1982." "EPA/600-S3-82-018."
Contents Notes
This study is part of a series of investigations undertaken to determine the effect of the discharge of drilling fluids on marine fauna. The first division of this project was to determine the range of concentrations of the mud aqueous fraction (MAP) and the suspended particulate phase (SPP) of a low-density lignosulfonate type mud with ferrochrome added (No. 4 mud) which would affect swimming behavior, survival and duration of development of the mud crab, Rhithropanopeus harrisii, and the blue crab, Callinectes sapidus, from the time of hatching until the 1 st crab stage is reached. As far as is known, this is the first investigation on the effect of MAP and SPP, soluble fractions of whole mud, on the complete larval development of crabs. These fractions would be found in the upper plume of discharges of an oil well. The percent survival from hatching to megalopa and to 1st crab stage was 90% or over in seawater control and in concentrations from 5% (5,000 ppm) to 100% (100,000 ppm) MAP and SPP in three replicate series of R. harrisii larvae tested. There was differential survival of Callinectes sapidus from hatching to 1 st crab stage in concentrations from 5% to 50% MAP and SPP, but no larvae reached the 1 st crab stage in 100% MAP or SPP. Statistical analyses of the data on survival, mortality and behavior are presented. A second division of the project was to determine the effect of hexavalent chromium, Na2CrO4, on the complete larval development of R. harrisii and C. sapidus from the time of patching to 1 st crab stage. The effects of different concentrations of Na2CrO4 on survival and duration from hatch to megalopa and hatch to 1 st crab stage are given, and the most sensitive stages of larval development were determined for each species. Statistical analyses of the data on survival, duration, rate of molting, mortality and behavior are presented.