Southwestern Illinois RC&D, Inc.

Southwestern Illinois RC&D - Current Projects

This project will determine the density of fish populations on certain lakes in the lower Kaskaskia River floodplain, as well as to determine the effects of variable hydrological regimes on the fish populations. This is a 3-year study, funded by IDNR, being conducted by Mr. Dave Wahl, Director, Illinois Natural History Survey. The project is located in St. Clair and Washington Counties.

The purpose of this project is to further evaluate physical characteristics (e.g., size, depth, flood intensity, distance from the river) that may affect fish community composition in oxbow lakes of an unchannelized reach of the lower Kaskaskia River. The areas chosen for this project include:

Results from this project, when compared to previously obtained results, will lead to conclusions on the effects of varying hydrological regimes on existing fish populations. This research will lead to future management plans that will maximize the production of fish in the various oxbows and wide range of aquatic habitats in the Kaskaskia River floodplain.

Staff from the Illinois Natural History Survey will conduct field sampling and data analysis at each site twice per year, once in fall and once in spring. Sampling will include shoreline electroshocking and seine hauling. In addition, water levels will be monitored throughout the year through the use of permanent gauging stations.

The University of Illinois at Urbana-Champaign will provide project fiscal information and prepare a scientific report upon completion of the sampling and data analysis.