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Producing largemouth bass at Illinois’ Jake Wolf Hatchery is a mechanical process

Above, a female largemouth bass about to be transferred into a holding tank after being removed from a broodstock pond at the Jake Wolf Fish Hatchery in Mason County. (Photos by Frank Sladek)

Largemouth bass spawning season at the hatchery begins with a turn of a wheel.
In nature, spawning season begins as soon as the water is warm enough to let the bass know that it’s time, but at Jake Wolf Memorial Fish Hatchery, Illinois DNR’s Mason County facility where water levels and temperatures are controlled by humans, it’s a more mechanical process.

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