Abstract
Butyltin compounds (BTs) are considered as endocrine disruptors or environmental hormones. It has been applied as an antifouling paint in marine vessel, and extensively in commercial, industrial and agricultural applications. In order to investigate the decomposition and accumulation of BTs in benthic crustacean, concentrations of BTs including TBT (tributyltin) and its metabolic products, i.e. MBT (monobutyltin) and DBT (dibutyltin), accumulated in Thalamita crenata in Kaohsiung Harbor, Taiwan were analyzed. The analysis results indicate different concentrations of BTs contained in hepatopanceas and muscle for the crustacean trapped at different locations. Additionally, concentration and composition of BTs found in the crustacean hepatopanceas and muscle also show differences. Hepatopancreas has higher concentrations of BTs than muscle; the BTs contained in hepatopancreas are mostly metabolic products of BTs, whereas the muscle contain higher concentrations of TBT. By the estimates of BDI (butyltin degradation index) and BSAF (biota-sediment accumulation factors), T. crenata shows slow degradation ability of TBT and relatively strong TBT accumulation. The sources of BTs accumulated in T. crenata include harbor sediment and the food that contains BTs.
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