Peter Sorensen

dbe4d42c12164d10520f6a70670003cd.jpg

Peter Sorensen, left, a University of Minnesota professor of fisheries and aquatic biology, and doctoral student Dan Zielinski, right, sit in a 10,000- liter experiment tank on Wednesday, April 23, 2014, in their lab in St. Paul, Minn. in which they have created sound and bubble barriers to divert invasive Asian Carp. Sorensen, the director of the Aquatic Invasive Species Research Center, holds an underwater speaker. They hope to receive $60,000 in funding to order and install five 196-decibel speakers at the Lock & Dam #8 on the Mississippi River at Genoa, Wis. to stop the spread of bighead and silver carp, which are successfully breeding below the dam. (AP Photo/ Pioneer Press, Scott Takushi)