Record Display for the EPA National Library Catalog


Main Title Cadmium Toxicity to Three Species of Estuarine Invertebrates.
Author Pesch, Gerald G. ; Stewart, Nelson E. ;
CORP Author Environmental Research Lab., Narragansett, RI.
Year Published 1981
Report Number EPA-600/J-80-235 ;ERLN-J134;
Stock Number PB81-184707
Additional Subjects Cadmium ; Toxicology ; Invertebrates ; Toxicity ; Estuaries ; Metals ; Bioassay ; Lethal dosage ; Reprints ; Palaemonetes pugio ; Grass shrimp ; Pagurus longicarpus ; Hermit crab ; Argopecten irradians ; Bay scallop ; Bioaccumulation
Library Call Number Additional Info Location Last
NTIS  PB81-184707 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
Three species of estuarine invertebrates, Palaemonetes pugio (grass shrimp), Pagurus longicarpus (hermit crab) and Argopecten irradians (bay scallop), were exposed to Cd in flowing seawater at concentrations of 0.06, 0.12, 0.25, 0.5 and 1.0 mg/litre. Incipient LC50 values of 0.53 and 0.07 mg/litre were estimated for bay scallop and hermit crab, respectively. The toxicity curve for grass shrimp had not stabilized, but the incipient LC50 value was estimated to fall within a range of 0.2 to 0.3 mg/litre. Short-term response, as measured by time to 50% mortality at the highest Cd concentration, was 10, 21 and 23 days for the bay scallop, hermit crab and grass shrimp, respectively. Scallop growth was inhibited at all exposure concentrations with a measured 42-day EC50 value of 0.078 mg/litre Cd. Byssal thread detachment precedes death in bay scallops. An EC50 value of 0.54mg/litre Cd for gyssal detachment was measured on day 8 of the bioassay before appreciable mortality. This compared favorably with the incipient LC50 value of 0.53mg/litre Cd. Cadmium accumulation occurred at all concentrations in bay scallop and grass shrimp.