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Research articles

ScienceAsia (): 367-370 |doi: 10.2306/scienceasia1513-1874...367

Comparative toxicity of mercury and cadmium to the juvenile freshwater snail, Filopaludina martensi martensi

Piansiri Piyatiratitivorakula,*, Pachanee Boonchamoib

ABSTRACT:     The toxicity bioassay of the juvenile freshwater snail, Filopaludina (Siamopaludina) martensi martensi exposed to mercury and cadmium was studied. The median lethal concentrations of mercury were lower than those of cadmium after 24, 48, 72, and 96 h of exposure. In metal bioaccumulation experiments, the mean residual concentrations of mercury and cadmium in the treated snail and the treatment water were assessed. However, more cadmium was found accumulated in its tissues.

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a Department of Zoology, Faculty of Science, Kasetsart University, Jatujak, Bangkok 10900, Thailand
b Urupong X-ray Lab, 1131/351-356 Therddamri Road, Nakornchaisri, Bangkok 10300, Thailand

* Corresponding author, E-mail: fsciprp@ku.ac.th

Received 25 Feb 2008, Accepted 28 Oct 2008