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They actually compete with gizzard shad and young-of-the-year fish. I saw my first skinny shad on the IL river shortly after they came through in 2000.
If I was a betting man, I would bet they won’t ever get too thick around here because from Keokuk north, we really are a series of reserviors, not a free flowing river. Their reproduction strategies don’t seem to link up this that type of water. When the 3-gorges dam was finished in China, it wiped them out over there. The IL river is a long, free flowing river compared to the Upper Miss.
They’re here already, just not reproducing.
Just my 2 cents.
JH
This would be outstanding. However, there are still “reservoir” pools all the way down to St. Louis and they’re thick in that part of the Mississippi, aren’t they?