A few years ago a clients pond winterkilled when the wind conditons didn't favor windmill aeration. It was a relatively new pond (3 years old) that he had stocked lightly, and we had a very good idea of the number of fish in it.

You can read about it here: http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=280429&page=1

That following fall, the pond was drained and rotenoned. While only 49 HSB were counted floating, 0 were found in the pond when it was drained. So, 51% sunk and never surfaced.

IIRC not all the trout were accounted for either, and they were fished for before water temps increased. The amount of RES and YP that were in the pond were very low at the time of draining and rotenoning, nowhere the number of stocked fish.

I know that this isn't good news for you, but I don't want you to have false hopes.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).