We used to put them in formaldehyde and ship them off to the sea lamprey control in Sault Ste. Marie. Funding was cut for that for the southern half, so now we cut them in half. We make sure they don't go back alive.
We used to put them in formaldehyde, and then they would study them to see if their reproduction organs were still in place—male, female, those are the types of things that were done.
I believe they still do that in the north; they just don't do it with the south half of the lake.