I agree 100% the perch fishing has been down just check fisherman’s warf website in port Clinton totals for the last 5-10 years. I’m sure those spiny water fleas have something to do with it along with the abundance of walleye and the cormorants. Also the perch lately just don’t bite like before. It’s actually work to go out and catch a limit. Back in the day I could take out the kids and wife who don’t fish to much and they could feel a hit on there rig. It seems everyday is different they way they want the bait. Try a bunch of different presentations to try to feel the bite. Like I said it’s almost like work when trying to catch these yellow bellies the last few years. But I love the challenge. Goodluck