ABSTRACT
ABSTRACT. The influence of fertilization and of fry stocking den sity on production of fingering walleye, Stizostedion vitreum, was evaluated in earthen ponds at North Platte State Fish Hatchery, North Platte, Nebraska. In 1990, five 0.4-ha ponds were fertilized with alfalfa pellets, and five were fertilized with soybean meal; four un fertilized ponds served as controls. All ponds were stocked with D2 (D1 = the day at hatch) walleye fry at 250,000/ha. Differences in yield, number of fingerlings harvested, mean length, and mean weight among treatments were not statistically significant (P > 0.05). In 1991, two fertilization schedules (no fertilizer and fertilization with alfalfa pellets) and two fry stocking rates (250,000 and 375,000 fry/ha) were evaluated. Four ponds were used for each treatment. Statistically significant treatment differences were found in yield,
Lloyd M. Harding and Robert C. Summerfelt, Department of Animal Ecology, Iowa State University, Ames, IA 50011-3221, USA.
