I have been finding a few dead yellow perch in my pond and no real clue as to why. I have always found a couple each spring time after ice out but never found any this late in the spring unless they were caught and released with injury that they later succumbed too. I am curious if it is old age? I do have some fish that were hand caught when I stocked in 2009 that could have been stunted, I'm not alarmed as with any body of water there are casualties I'm just curious if anyone has any ideas what causes this.

I found one this morning that was a 16 incher, biggest I've ever caught was 15 1/2 so I can't imagine my management is way off for my intended goals.