If you are still looking I found this on the Texas Parks and Wildlife site.

http://www.texasaquaculture.org/id86.htm

As far as the stocking or age of the pond. I don't know. My problem was a old pond with little to no forage. Along with other several measures I added 8+" Tilapia to get things going. It has helped greatly and hopefully won't lose all of them during the winter.