Pond Boss Forums MANAGING AN EXISTING POND Evaluating and adjusting fish populations Stocking new fish dying

Is there a reason why on my shallower ponds the following trend happened: catfish most if not all died; HSB died (5); Bluegill died (3); walleye most survived (1 of 5 died); All LMB survived (5); most minnows survived. Triploid Amurs all survived (I think); Paddlefish died (only 1);

So I dont see a rhyme or reason to survival based on size; ALot of these fish died after the final freeze and had fungus on them. Several of the catfish had what appeared like oversized cigarette like burns on them that seemed exposed. What are these?

I guess I'm trying to figure out what about this super harsh winter got to certain species before others but struggle to find information on why one survived versus the other.

Also concerned on catfish in the main pond. I cant see the bottom in that one, its alot deeper and bigger but I'm concerned maybe all of them are dead I just won't know it cause unlike the smaller ponds where I found them all at the bottom dead, I cant see them in the larger one.