M. Lalande, B. Pinel‐Alloul
Environmental Toxicology and Chemistry
This study deals with cultures of Tropocyclops prasinus mexicanus, a Cyclopoid copepod from three Quebec lakes (one polluted and two unpolluted), in a comparative toxicity test involving four heavy metals. Experiments were performed according to a static toxicity protocol. The 48-h EC50 of each individual metal and of the combination of metals were determined for each culture. The overall toxicity trend is mixture > Hg > Cu ≥ Cd ≥ Zn. Cultures from unpolluted and low-hardness lakes showed lower EC50 mean values than did the strain originating from the polluted lake with high water hardness.