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Ralph Loos: Examining some results from Chicago River bass study

Annual surveys are showing an increasing number of bass collected from the Chicago River, but many of those fish tend to be small. “We find it interesting that the Chicago River population does not seem to be producing larger largemouth bass, and we are investigating why this may be to see if it is possible to change this," wrote Austin Happel, a research biologist with the Shedd Aquarium. (Stock photo)

Even readers in deep southern Illinois are keeping a close eye on a largemouth bass tracking project taking place in waters most from the south will never drop a hook, line or sinker into.
The Chicago River, of all places. The project we speak of here is one that in 2024 placed numbered tags on largemouth bass to make it easy for anglers who catch bass in the Chicago River to report individual fish to a research team. The goal is to help biologists better understand movements and motivations.

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