His research broadly encompasses fisheries conservation and management issues. Working in the freshwaters of Southern New England, Dr. Vokoun has studied state endangered species and other fishes of imperiled status, defining the needed habitats and stream water quantities and quality necessary for sustainable populations into the future. His research recently documented how fish communities changed in rivers that receive increasing levels of water withdrawals for both human drinking water and agriculture. He has also worked with species that are abundant and recreationally fished, including largemouth bass, and sunfish/perch communities in lakes and ponds.