Summary
Static acute toxicity bioassays with adult softshell clams and salts of copper, cadmium, zinc, lead, manganese, and nickel were conducted at 30 ‰ salinity and 22°C. Concentrations fatal to 50% in 168 hours, in mg/ℓ (ppm) metal added at start, were 0.035 for Cu, 0.150 for Cd, 1.55 for Zn, 8.80 for Pb, 300.0 for Mn, and >50.0 for Ni. Additional tests were conducted with Zn2+ and Cu2+ at 30 ‰ during fall (17.5°C) and winter (4°C); clams displayed increasing survival with decreasing temperature. For Cu, LC-50 (336 hr) values at 17°C and 4°C were 0.086 and >3.00 mg/ℓ, respectively; for Zn these were 2.65 and >25.0, respectively.
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Eisler, R. Acute toxicities of selected heavy metals to the softshell clam,Mya arenaria . Bull. Environ. Contam. Toxicol. 17, 137–145 (1977). https://doi.org/10.1007/BF01685540
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DOI: https://doi.org/10.1007/BF01685540