Catch rates in gillnets and relative weight (Wr) of walleye Stizostedion vitreum, in Glen Elder
Reservoir, Kansas, were lowest during the summer (June–August) and highest during the
autumn (September–November). Approximately 80% of their annual growth in length and
mass was attained during late summer and autumn. Growth was minimal during winter
(January–February) and spring (March–May). The number of walleye with empty stomachs
was highest during the summer. Invertebrates (Cladocera, Chironomidae) were common in
walleye stomachs during the summer and spring, but contributed little to the ingested biomass.
Gizzard shad Dorosoma cepedianum dominated walleye diets (per cent by mass) throughout the
year. A bioenergetics model predicted that the proportion of maximum consumption (Pc) was
highest during the autumn and was probably due to spatial overlap of walleye and gizzard shad
once water temperatures were