Madison, Wisconsin: Wisconsin Department of Natural Resources
Summary
We reviewed over 100 publications and unpublished reports, contacted over 30 fisheries biologists from 20 universities and natural resource management agencies, and made on-site observations of projects in Illinois and Missouri to determine what is currently (early 1989) known about physical habitat improvement for fisheries in warmwater streams. Previous improvement work has focused on 3 main objectives: reducing bank erosion and in-stream sedimentation, modifying channel morphology and alignment, and increasing in-stream cover. A wide variety of techniques appear to be useful in achieving these objectives, although few have been adequately evaluated.