Wanted to add that I haven't noticed any recruitment since I've had my YP but I have seen a couple of ribbons, one a year almost, lol. Well recently I was laying on my dock looking at a piece of aluminum siding I put in (per John Monroe) when I saw a small perch swim by! I must have had some recruitment because it was smaller than an original stocker. I did try setting minnow traps to sample but never did catch one that way. I used stale bread as bait and a chicken neck one time, maybe I wasn't at the correct depth or maybe they are had to catch that way.