The effects of mercuric chloride on the survival and chloride ion regulation of Petrolisthes armatus (Crustacea: Porcellanidae).




Roesijadi, G.
Petrocelli, S.R.
Anderson, J.W.

Journal Title

Journal ISSN

Volume Title



Petrolisthes armatus was exposed to mercury concentrations of 0.035-1.0 micro g/ml in 15 parts per thousand (ppt) salinity Instant Ocean synthetic seawater. The 96 hour TLm concentration was approximately 0.05 micro g/ml. Newly molted crabs appeared to be more susceptible to mercury toxicity than intermolt crabs. Exposure of crabs to mercury in salinities of 7-35 ppt indicated that salinity modified the effect of mercury on survival. In 0.1 micro g/ml mercury, maximum survival after 96 hours exposure occurred in salinities of 21 and 28 ppt. P. armatus acclimated to salinities of 7-35 ppt regulated internal chloride ions hyperosmotically below 24 ppt and hypoosmotically above 24 ppt. Internal and external chloride ion concentrations were isosmotic at 24 ppt salinity. Preliminary studies showed that short-term exposure to 0.05 migri g/ml mercury did not significantly affect the ability of P. armatus to regulate internal chloride ion concentrations.


p. 260-262.


Petrolisthes armatus, crabs, chemical compounds, salinity, survival, molting, toxicity, ion accumulation