Abstract
Seasonal changes in energy content of 500–600 cal/g occurred in whole walleye within a 1-year period. Energy content was lowest in spring and highest in fall. Seasonal changes in species, weight, and energy occurred among prey, but fish were the major diet contributors in terms of weight and energy. Gammarus lacustris appeared in all stomachs taken from walleyes but were minor nutrient contributors. Wide ranges in caloric values occurred within most taxa examined, and the importance of any taxon varied with the form of analysis, i.e., number versus calories.
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