A scientist has discovered a chemical compound that attracts
an invasive fish. The Great Lakes Radio Consortium’s Mike Simonson
reports that this could be a breakthrough in controlling harmful fish
A scientist has discovered a chemical compound that attracts an invasive fish. The
Radio Consortium’s Mike Simonson reports that this could be a break through in
harmful fish populations:
Eurasian ruffe were introduced in the Duluth-Superior harbor from ballast water of
ships in the 1990’s. Ruffe reproduced so quickly, they now make up 80 to
90-percent of the fish
population, squeezing out native fish. Now, they’re spreading eastward across Lake
toward the lower Great Lakes.
University of Minnesota Fisheries Professor Peter Sorenson says he’s isolated a
will cause the fish to cluster in great numbers of male ruffe who are tricked into
thinking it’s time
“It causes a great deal of sexual arousal and excitement. So to help detect this
thing, I suppose
like a dog they get a little crazy and just start swimming around like crazy and
inspecting the fish in the tank.”
Once they’re clustered, Sorenson says it may be possible to find a way to cut their
Sorenson hopes to find a similar pheromone in carp and sea lamprey, other invasive
which threaten native fish in the Great Lakes.
For the Great Lakes Radio Consortium, I’m Mike Simonson.