The Effects of Dechlorinated Industrial Effluent on Striped Bass 'Morone saxatilis' Ichthyoplankton

摘要

The effects of sulfur dioxide (SO2) dechlorination on estuarine striped bass, Morone saxatilis, eggs and larvae were evaluated by exposing the organisms to the following conditions: (1) total residual chlorine (TRC); (2) SO2; (3) TRC-SO2 dechlorination, and (4) control. Continuous exposure to TRC concentrations ranging from 0.06 to 2.0 mg/L were lethal to both life stages over a 96-h exposure period. The same range of SO2 (sulfite) concentrations caused an effect on the eggs after 36 h; however, percent mortality did not increase with concentration of SO2. Dechlorination caused significant reductions in TRC toxicity at all exposure periods less than 36 and 96 h for eggs and larvae, respectively.