This investigation determined broodstock densities, and assessed various life history characteristics of the broodstock populations (e.g. age-growth, mortality, etc.) for input into the General Inland Fisheries Simulator Model (GIFSIM). This was the first year of a 5 year study so few results are available. Simulations with the GIFSIM model will help determine which natural lake walleye fisheries may benefit from special harvest regulations and which lakes may not benefit from such regulations. These findings will be of direct benefit to management of walleye populations in other natural lakes, and will become an integral part of the overall strategy for maintenance and improvement of Iowa's walleye fisheries.