Environmental Effects of Dredging. A Chronic Sublethal Sediment Bioassay with theMarine Polychaete Nereis (Neanthes) Arenaceodentata

摘要

This note provides a general overview of a new 28-day chronic sublethal sedimentbioassay designed for the regulatory evaluation of dredged material. The bioassay uses survival and growth rate endpoints with the polychaete Nereis (Neanthes) arenaceodentata. The primary technical reference for this new bioassay is Dillon, Moore, and Reish (in press), upon which this overview is based. Sediment bioassays are used to assess the aggregate toxicity of sediment associated anthropogenic chemicals. Historically, these bioassays have measured survival of highly sensitive species following acute exposures (10 days). A new generation of sediment bioassays is being developed in which the subtle, sublethal response of test species is measured following chronic sediment exposures (Dillon 1993). pg1. JMD.