PARENT SESSION
PW7 - Biotransformation / Metabolisms / Degradation
Wednesday, 20 November 2002
8:00 AM to 6:30 PM
Exhibit Hall
(P803) Accumulation of p,p'-DDT in marine organisms exposed to DDT and TBT.
Hong, Sang Hee*,1, Shim, Won Joon1, Shin, Yeong Beom1, Jeon, Joong Kyun2, Jin, Fenji1, Oh, Jae Ryoung1, 1 Korea Ocean Research and Development Institute, Ansan, Korea2 Kangnung National University, Kangnung, Korea
ABSTRACT- Olive flounder (Paralichthyls olivaceus), clam (Gomphina veneriformis melanaegis) and rock shell (Thais chlavigera) were exposed to DDT with (or without) TBT for 60 days to evaluate the effects of mixed-chemical exposure on DDT accumulation. Concentrations of DDT and its degradation products (DDD, DDE, DDMU, and DBP) increased in all target species according to exposure duration. Among the metabolites, DDD was dominant with 43 - 97% of total DDT concentrations, which is followed by DDE (1 - 55%), DDMU (0.3 - 2%), and DBP (0.2 - 3.6). After 60-day exposure, metabolites accounted for the large portion of total DDT concentration (DDT / total DDT = 0.15) in fish liver of the DDT only exposure group, while DDT was predominant in liver of the DDT + TBT exposure group (DDT / total DDT = 0.83). Similar effect was also observed in gastropod, but not in bivalve. These results imply that TBT affect on degradation of DDT compound in liver of olive flounder and gastropod.
Key words: DDT, Tributyltin, Accumulation, Metabolism