This project is determining concentrations of PCBs in sturgeon eggs above which fish populations may be harmed. We are evaluating reproductive effects of PCBs found in Areas of Concern and throughout the Great Lakes Basin. Hatchery sturgeon with varying levels of PCBs in their tissues or sturgeon eggs dosed with PCBs under controlled conditions have been used to determine thresholds in tissue that represent unacceptable risk and injury. We expect the results to influence cleanup and restoration decisions and natural resource damage assessments to improve habitat quality and fisheries.
Lake Sturgeon Health Assessment