Acute toxicity of chlorine-produced oxidants (CPO) to the marine invertebrates Amphiporeia virginiana and Eohaustorius washingtonianus

The acute toxicity of chlorine-produced oxidants (CPOs) was determined for the Atlantic and Pacific marine amphipods, Amphiporeia virginiana and Eohaustorius washingtonianus, respectively. The CPOs were determined in seawater as Cl equivalents. Effects on amphipods were determined at 5, 10, 20, and 40 min, at 1, 3, 6, and 12 h, and at 12-h intervals thereafter until 168 h. Results showed that the LT sub(50) values for both species were related inversely to the CPO concentrations, and the 24-, 48-, and 168-h LC sub(50) values were determined to be 0.99, 0.63, and 0.134 mg/l for A. virginiana, respectively, and 1.85, 0.567, and 0.043 mg/l for E. washingtonianus, respectively. The overall results showed that CPOs were highly toxic to both species.