Authors: ChungMin Liao ShengFeng Jau ChiehMing Lin LiJohn Jou ChenWuing Liu Vivian HsiuChuan Liao FiJohn Chang
Publish Date: 2009/04/25
Volume: 18, Issue: 5, Pages: 567-576
Abstract
We developed an inductancebased valvometry technique as a detection system to measure the valve daily activity in freshwater clam Corbicula fluminea in response to waterborne arsenic Our findings reveal that C fluminea experiences a valve opening in the absence of arsenic predominantly in the morning hours 0300–0800 with a mean daily opening/closing period of 2132 95 CI 2058–2205 h Amplification of daily activity occurred in the presence of arsenic Behavioral toxicity assays revealed arsenic detection thresholds of 060 95 CI 053–066 mg l−1 and 035 95 CI 030–040 mg l−1 for response times of 60 and 300 min respectively The proposed valve daily activity model was linked with response timespecific Hill doseresponse functions to predict valve opening/closing behavior in response to arsenic The predictive capabilities were verified satisfactory with the measurements Our results implicate a biomonitoring system by valve daily activity in C fluminea to identify safe water uses in areas with elevated arsenicThe authors acknowledge the National Science Council of Republic of China for financial support under the Grant NSC 952313B002052MY3 We also thank Biosystems Modeling and Control Lab members for assistance with collection of field samples and assays This work was inspired by the original paper appeared in Environmental Toxicology and Chemistry 22 914920 2003 by Dr Tran and coworkers
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