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OLS Field Name OLS Field Data
Main Title Methods for Conducting Snail (Aplexa hypnorum) Embryo through Adult Exposures: Effects of Cadmium and Reduced pH Levels.
Author Holcombe, G. W. ; Phipps, G. L. ; Marier, J. W. ;
CORP Author Environmental Research Lab.-Duluth, MN.
Year Published 1984
Report Number EPA/600/J-84/157;
Stock Number PB85-148419
Additional Subjects Cadmium ; Toxicity ; Snails ; Water pollution ; Exposure ; Chlorides ; pH ; Bioassay ; Embryos ; Concentration(Composition) ; Life cycles ; Growth ; Survival ; Lake Superior ; Reprints ; Aplexa hypnorum
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB85-148419 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 10p
Abstract Two separate embryo through adult exposures were conducted with cadmium and with reduced pH levels to validate various test methodologies and to determine the feasibility of testing and ease of handling the freshwater snail (Aplexa hypnorum) in a test system designed for fish bioassays. Exposure of snails, from embryos through adult reproductive maturity to cadmium chloride produced delayed hatch, reductions in percentage hatch and survival, and reduced growth when compared to a control. Based on these effects, the maximum acceptable toxicant concentration in Lake Superior water was between 4.41 and 7.63 micrograms cadmium/l in one test and between 2.50 and 4.79 micrograms cadmium/l in another test. Adult snails were exposed to determine a 96-hr LC50 of 93 micrograms cadmium/l. Exposure of embryonic, larval and adult snails to a pH range of 5.00-5.75 caused delayed hatching, reduced combined hatchability and survival, reduced 26-day growth, and a reduction in the number of egg masses per adult snail.
Supplementary Notes Pub. in Archives of Environmental Contamination and Toxicology 13, p627-634 1984.
NTIS Title Notes Journal article.
Title Annotations Reprint: Methods for Conducting Snail (Aplexa hypnorum) Embryo through Adult Exposures: Effects of Cadmium and Reduced pH Levels.
PUB Date Free Form 1984
Category Codes 6C; 6T; 68D; 57Z; 57Y
NTIS Prices PC A02/MF A01
Primary Description 600/03
Document Type NT
Cataloging Source NTIS/MT
Control Number 510225105
Origin NTIS
Type CAT