Acknowledgements
The authors wish to thank Dr. Shinsuke Tanabe and scientists who joined ‘‘Asian Mussel Watch Project’’ for kindly providing sediment samples from Cambodia,Indonesia, and India, Dr. Shin Takahashi and Dr.Daisuke Ueno for their managing the samples and Dr.
Pravakar Mishra for his assistance on collecting Kolkata samples. This work was financially supported by the Ministry of Education, Culture, Sports, Science and
Technology, Japan, under ‘‘Research Project for Sustainable Coexistence of Humans, Nature and the Earth’’. Our field trips were supported by Japanese International Cooperation Agency (JICA) under‘‘JICA/UPM Technical Collaborative Project on Malacca
Straits (MASDEC)’’ and ‘‘JICA/Can Tho University Project for Improvement of Environmental Education in Agricultural Sciences’’. Assistance by several graduates and undergraduates in our laboratories and fieldwork are kindly acknowledged.