Abstract
Bacterial tolerance to bis-tributyltin oxide (TBTO) and triphenyltin chloride (TPT) was compared at different contaminated areas by the agar plate method. The TBT concentration at which colony forming units (CFU) began to decrease (inhibitory concentration, IC) was almost the same within the range of 2 to 40 μg Sn/l of TBTO for all samples but one. The proportions of TBTO-tolerant bacteria were also not related to the ambient level of contamination. The Tolerance of bacteria in sediment samples was higher than that in water samples from each station, but was not proportional to the level of contamination. The numbers of TPT-tolerant bacteria did not reflect the numbers of TBTO-tolerant bacteria. These findings demonstrate that the distributions of TBT- and TPT-tolerant bacteria were independent to of the level of TBT contamination.
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