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•Deepwater ciscoe(bloaters), sculpins, lake
herring, smelt, and alewives constitute the bulk of the prey biomass
availible to trout and salmon in the colder deeper areas of the lake.
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•Alewife, smelt, gizzard shad, spottail, emerald
shiners, young whitefish, and yellow perch, and now goby(Saginaw Bay) are
important seasonally in the diets of nearshore predators.
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•With the majority of prey species not being
controlled by either predation nor fishing, abundance usually varies within
wide limits. Species diversity(including prey species) imparts some overall
stability to the prey base by minimizing effects of year-to-year variations
within single species.
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•Overall balance implied in the prey objective
is normally achieved by manipulating predator numbers through harvest
controls and stocking.
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