WAUKEGAN (AP) -- With such long periods of snow and thick ice covering Illinois lakes and ponds, there is a possibility of killing off fish.
The Lake County Health Department is advising residents to report fish kills. Dead fish along shores should be collected and disposed of in the trash.
The fish are dying because snow and ice block sunlight, reducing the amount of oxygen in the water. Trout are the most sensitive to the lack of oxygen. Walleye, large-mouth bass and bluegill also have some sensitivity to the problem.
Restocking a pond or lake is rarely necessary because enough fish usually survive to repopulate the body of water in a couple of years.