60+ years of monitoring large river fishes in Illinois

Read the full story in Outdoor Illinois.

Survey and Assessment of Large-River fishes in Illinois (commonly referred to as LTEF for Long Term Electrofishing) has been tracking changes in the Illinois River fish community, water quality and habitat since 1957. Over the years, funding and program leadership has periodically changed, but monitoring has always been conducted by Illinois Natural History Survey (INHS) biologists out of Havana, Illinois, currently at the Illinois River Biological Station (IRBS). Since 1989, funding for the LTEF program is provided by the Illinois Department of Natural Resources/U.S. Fish and Wildlife Service Federal Aid in Sportfish Restoration program.

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