Hemoglobin concentration and acetylcholinesterase activity of oligochaetesin relation to lead concentration in spiked sediments from Ignacio Ramirezreservoir

This paper presents toxicity and uptake data of Limnodrilus hoffmeisteri ge nerated by lead in systems using natural sediments from Ignacio Ramirez res ervoir. Lead uptake, hemoglobin concentration, and acetylcholinesterase act ivity were studied in L, hoffmeisteri exposed to spiked sediments, All assa ys of lead uptake were conducted using whole sediments. Sediment texture wa s also considered, Acetylcholinesterase activity and hemoglobin concentrati on decreased after treatment with lead. Acetylcholinesterase activity and h emoglobin concentration tests indicated a response to the concentration of lead. These results suggest the usefulness of a diversity of bioassays to e valuate the toxicity of sediments polluted with heavy metals. (C) 2001 Acad emic Press.