
Michigan Department of Natural Resources fisheries biologist Cleyo Harris makes an incision into the stomach cavity of a grass carp so the fish can be tagged with a transmitter.

An acoustic transmitter is shown being inserted into the stomach cavity of a grass carp. Blood is also being drawn from the fish to use in determining whether this carp was capable of reproducing (diploid) or sterile (triploid).

An incision on a grass carp is being sutured closed after a transmitter has been placed into the stomach cavity. Once suturing is complete, the fish is released.
Talk to anyone familiar with Michigan’s invasive species and you’re likely to hear their concern about carp – voracious, prolific, invasive carp.
News of electric barriers and fish flying into boats by the dozens may sound like a big fish story.
However, while they are sizable creatures, there is nothing exaggerated about the ecological and environmental damage that would occur if bighead and silver carp were ever to enter the Great Lakes.
Therefore, a good deal of attention is being paid to the work done by researchers and biologists in the Great Lakes states and Canada to help stop invasive bighead and silver carp from moving through the Chicago Area Waterway System toward Lake Michigan. Read more