Fisheries, Midwest Region
Conserving America's Fisheries
Barge Studies

Since early 2012, the U. S. Fish and Wildlife Service (USFWS) Carterville Fish and Wildlife Conservation Office (FWCO) has been performing fish-barge interaction evaluations at the electric dispersal barrier system in the Chicago Sanitary and Ship Canal (CSSC). Initial work consisted of placing wild-caught fish within a non-conductive cage alongside, in, and around different parts of a barge. The fish were then moved through the barrier and the effect of the barrier on the fish (incapacitated or not incapacitated) was recorded. Later we used unconfined Gizzard Shad (not placed in cages) that were tethered to floats. These fish were either placed directly into areas around barges as they traversed the barrier or placed in front of oncoming barges as they approached and traversed the barrier. Results of what happened (e.g. entrained or not; live or dead) were recorded. The interim report is a summary of this work to date.

 

DIDSON Fish Behavior Studies

Beginning in June 2011, the U.S. Fish and Wildlife Service’s (USFWS) Carterville Fish and Wildlife Conservation Office (FWCO) began evaluating wild fish populations and their behavior within the electric dispersal barrier located in the Chicago Sanitary and Ship Canal. Using a dual-frequency identification SONAR (DIDSON) unit, we evaluated fish populations throughout the entire barrier system, which covered the entire gradient of barrier voltages, and also performed concentrated evaluations directly over the strongest part of the barrier. The interim report is a summary of this work to date.