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Carp tagged by Illinois DNR, USGS appear affected by underwater acoustics used as deterrent

Marybeth Brey, left, of the U.S. Geological Survey, teaches a student how to tag a silver carp. (Photo courtesy of USGS)

For the last two years, researchers on the Mississippi River have been studying the effectiveness of underwater acoustics as an invasive carp deterrent.
Halfway through the study, the results are promising.
Marybeth Brey, a research fish biologist with the U.S. Geological Survey and Christa Woodley, a research biologist with the Army Corps of Engineers, co-lead the project. They designed and installed a 16-speaker soundbar at Lock 19 in the Mississippi River, a section of the river between Keokuk, Iowa, and Hamilton, Ill.

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