摘要：We investigated walleye (Stizostedion vitreum) prey selection by comparing results from feeding experiments and stomach content analysis. Walleye captured from Lake McConaughy, Nebraska in June through September, 1995, were presented treatments of three prey species-yellow perch (Perca flavescens), white sucker (Catostomus commersoni) and either alewife (Alosa pseudoharengus) or gizzard shad (Dorsoma cepedianum). In the feeding experiments, walleye selected white sucker and yellow perch over alewife and gizzard shad. However, alewife were the most abundant prey species in walleye stomachs and not significantly different from their proportion in the natural prey fish assemblage. Differences in prey selection between experiments and field studies suggest that walleye altered their foraging behavior to take advantage of vulnerable or more accessible prey.
