Battle on Bago- Does it hurt the fishery?

Hoping to get some clarity (especially from DNR experts or those who study or have studied in the field of fish conservation etc) on how big tournaments such as Battle on Bago affect the fishery.  Do fish populations suffer? What is the affect on the overall fish reproduction- are they still able to reproduce at a fast enough rate to overcome the burden of so many fish being caught/killed in one window of time (like a weekend tournament) or have been seen a slow decline in fish populations since the start of Battle on Bago?  From a conservation perspective, my initial reaction to these huge tournaments is usually one of disgust but that's because I am ignorant to how it affects the fisheries so I am looking to learn more.  With that said, I understand Battle on Bago also donates a ton of money for all sorts of youth programs and conservation efforts, so I understand the benefit that comes out of it.  I am not trying to make any debate or argument, rather just trying to better understand the effects that Battle on Bago has on Lake Winnebago as a fishery.

A number of year ago, the DNR did creel surveys at a couple of  bigger landings during the perch bite, thousands of perch per day were brought in. Don’t remember the exact numbers but I maybe able to make a call.

Since they lowered the limit of walleye from 5 to 3, not sure the battle hurts anything.  I thought the system was just fine with a 5 fish limit.  

That is a good question. The BOB certainly does add a considerable amount of fishing pressure during the tournament as well as a significant amount of harvesting more fish than a normal weekend. To try and justify the existence of the BOB Tournament because some of the proceeds goes to a just cause is the same as saying it’s ok I robbed the bank because I donated it to charity. LOL.