Asian carp were found in the Lincoln Park lagoon being renovated at the zoo. That’s the lagoon on Chicago’s North Side lakefront, which was treated with rotenone in November.
Paul Bleers sent this photo, one of six from Bill Pohl. The skateboard was put in for perspective. Pohl guessed the weight around 20 pounds.
Mike Conlin , wildlife head for the IDNR, couldn’t tell for certain what the fish was, but confirmed Asian carp had been found during the renovation project. He did not think the finds were cause for concern.
Let’s set up with the e-mail from Bleers.
I wanted to reach out to you today about an unusual find my buddy Bill Pohl had yesterday….while biking around the south Lincoln Park zoo pond (the one currently being renovatated), he spied something of a notable size laying on the shoreline……..a beast of a fish……one that we’re having troubling identifing……Bill said that in trying to move it, it was at least 20lbs, if not more. The skateboard and beer bottle were put in the pics for perspective………we think it may be a silver carp. What do you think?
I’ve learned enough to ask people who know better than me.
Here’s Conlin’s answer on Friday.
I can’t really tell from the photos as the fish is long since dead (rotenone applied in early November). From the size estimated by Paul Bleers, it could be the remains of either a bighead carp or a silver carp. Several weeks after the rotenone application, Park District sent us several photos of what were either Bighead or Silver carp…..could not tell from the photos. These fish were estimated to be about 25 lbs. which would jive with Paul’s estimate of the size of the old fish remains he saw on the bank. Source is unknown. Could have been a cultural release, or they might have hitched a ride with a channel catfish stocking from a southern producer years ago. Lincoln Park South Lagoon is connected to Diversey Harbor via a12″ or so discharge tube (which is screened). Lake Michigan has been low for several years so the discharge tube is about 1.5 to 2 feet above the level of Lake Michigan (at least that was the case in November 2008). No need for concern here in my view.
Actually that sounds reasonable, considering three bigheads were confirmed over the years at the Mckinley Park lagoon.