Abstract
Acute toxicity bioassays conducted at various salinities demonstrated that mercury (as mercuric chloride) at low concentrations was lethal to Petrolisthes armatus. Ninety-six hour LC50 values varied from 50 to 64 parts per billion (ppb) of mercury, depending on test salinities. Lower salinities. decreased the time to death of mercuryexposed crabs. Differences in survival after 96 h due to salinity were not statistically significant. Blood chloride concentrations were regulated hyperchloride to the medium at low salinities and hypochloride at high salinities by acclimated crabs. The salinity isochloride to blood was 20‰ S. Transfer of crabs from 15‰ S to salinities ranging from 7 to 35‰ S resulted in new steadystate chloride levels within 12 h. Exposure to 50 ppb mercury did not alter chloride ion regulation of either acclimated crabs or crabs adjusting to new salinities.
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Communicated by O. Kinne, Hamburg.
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Roesijadi, G., Petrocelli, S.R., Anderson, J.W. et al. Survival and chloride ion regulation of the porcelain crab Petrolisthes armatus exposed to mercury. Marine Biology 27, 213–217 (1974). https://doi.org/10.1007/BF00391946
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DOI: https://doi.org/10.1007/BF00391946