By Bill Bartodziej, District Natural Resources Specialist
|Jim Levitt, DNR Fisheries Specialist prepares to release sunfish
at Casey Lake in North St. Paul
|Left: Jim Levitt removes fish from the holding tank that is temperature controlled.
Right:Levitt releases sunnies in Casey Lake
One of Minnesota’s favorite fish species, the bluegill sunfish, will be a welcome addition to Casey Lake. This native species will be fun to observe along the shore, a feisty fighter with hook and line, and a ferocious carp egg consumer. The latter quality will not only help Casey Lake, but will keep this system from becoming a carp nursery, which benefits the Phalen Chain of Lakes. How so? Well, University of Minnesota research has shown that juvenile carp can become overabundant and move from small storm water ponds, like Casey, into larger lake systems, like Kohlman, Gervais, and Lake Phalen. A key to controlling carp in larger lake systems is to stop reproduction in smaller connecting ponds and wetlands. Sunfish are sensitive to low dissolved oxygen levels, especially in the winter, so an aeration system will be installed by the City of North St. Paul, the Watershed, and the MN DNR. The goal is to have a sustainable sunfish population, which will provide an important neighborhood fishery, and at the same time, protect the Phalen Chain of Lakes from the invasive common carp.