Note
Fertilized clam eggs Mercenaria mercenaria were exposed to bis (tributyl)tin oxide (TBT) dissolved in seawater. Nominal initial exposure concentrations were 10, 25, 50, 100, 250 and 500 ng 1-1. Dosing protocol was daily renewal of static solutions. Chemical analysis indicated that initial dissolved TBT concentrations in seawater exposure solutions were ca 80% of nominal ones, but after 24 h, they fell to 20 to 30% of initial values.