Fish DNA in Ozark streams reveals region’s complex geologic history

A fish-finding expedition not only detects unexpected species but also uncovers a living link to Missouri’s geological past.

By: David Duvernell, Missouri University of Science and Technology, The Conversation

Outlets: The Conversation

Published: August 24, 2026

Words: 832

Last Updated: 1 month, 3 weeks ago

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By David Duvernell, Missouri University of Science and Technology

My students and I encountered a mystery. We were partnering with the Missouri Department of Conservation to monitor for fish presence and abundance in the Missouri Ozarks. We visited half a dozen rivers and streams across the region and collected a few cups of water from each.

We were testing for DNA in the environment to determine which species had left behind their genetic material …

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