“…Estimates of the half-life of biological degradation of TBT in fresh water from Toronto Harbor range from a few weeks to 4 months (Maguire and Tkacz, 1985;Maguire, 1986), substantially longer than the 4-19 d reported for seawater (Seligman et al, 1986b(Seligman et al, ,c, 1989Lee et al, 1987). Estimates of the half-life of biological degradation of TBT in fresh water from Toronto Harbor range from a few weeks to 4 months (Maguire and Tkacz, 1985;Maguire, 1986), substantially longer than the 4-19 d reported for seawater (Seligman et al, 1986b(Seligman et al, ,c, 1989Lee et al, 1987).…”