Keywords: walleye, alewife, economic impact

In southeastern United States reservoirs, alewife Alosa pseudoharengus were first introduced into several system to provide a stable forage base. A stable forage have enhanced some reservoir fisheries, but the loss of successful reproduction and recruitment of walleye Stizostedion vitreum has also occurred. Accidental introductions of alewife or range expansion have also occurred. One accidental introduction has lead to the recruitment failure of walleye in Norris Reservoir, Tennessee. The concern of losing the fishery resulted in the development of a walleye stocking model, which includes the economic benefits and costs of varying scenarios. No action by the state agency would cost the local economy over one million dollars in lost revenue annually. The stocking of 250,000 fingerlings would cost the agency $ 50,000 annually, but would result in a benefit:cost of $ 6.50:1.00. Increased stocking of walleye to 500,000 annually would result in a benefit:cost ratio of $ 8.75:1.00. The replacement of walleye natural reproduction would require the stocking of 1.2 million fingerling annually at a cost of $ 180,000. Consequently, the accidental introduction of alewife into Norris Reservoir will cost anglers both in loss of fishing opportunities and financially. Input to the local economy may also be affected, thus potentially influencing both employment and tax revenue.