Production of Walleye, Stizostedion vitreum, in Earthen Ponds Fertilized with Organic and Inorganic Fertilizers and Stocked at Three Rates

Abstract

Walleye, Stizostedion vitreum, fry were raised at densities of 20,30 and 40/m³ in ponds initially fertilized with alfalfa and yeast and supplementally fertilized with liquid inorganic fertilizers. Liquid fertilizers were added weekly to maintain N and P concentrations of 600 and 30 ug/L, respectively. Fish growth was not affected by stocking rate, but survival was significantly (P < 0.05) reduced in ponds stocked at the two higher rates. The fertilization procedure we used did not provide a sufficient forage base to support more that 20 walleye/m³.