Butyltins, Organochlorines and Metal Levels in Green Mussel, Perna viridis L. from the Coastal Waters of the Philippines

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  • Butyltins, Organochlorines and Metal Levels in Green Mussel, <i>Perna viridis</i> L. from the Coastal Waters of the Philippines

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Contamination by butyltins (BTs), organochlorine compounds (OCs) and heavy metals was examined in green mussels collected along the coastal areas of the Philippines in 1994 and 1997. Significant BTs concentrations revealed widespread contamination along nearshore marine waters. Relatively high BTs concentrations were observed in samples collected from areas with high boating activities, suggestive that the source of TBT (tributyltin) is coming from antifouling paints. While TBT levels were found to be low in green mussels collected from aquaculture areas, implying minimal usage of BTs for aquaculture activities. The composition of BT derivatives in mussel was in the order of TBT>DBT>MBT, reflective of continuous input of TBT in the coastal waters. Considering the unregulated use of organotins in the country, BTs contamination in the aquatic environment of the Philippines may increase in the future. Concentrations of OCs in green mussels were less than BTs. Among OCs, PCBs concentrations were found to be relatively high particularly in mussels from Manila Bay. Moreover, metal concentrations found suggest that the anthropogenic loading of Hg, Pb and Cd to the coasts is relatively low, suggestive that the green mussels from these coastal waters are not adversely affected by these metal toxicants and pose no risk for human health. To our knowledge, this is the first comprehensive report on the concentrations of butyltins, organochlorine compounds and heavy metals in soft tissues of ereen mussels in the Philippines.

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