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The Crustacea of
Plankton from July 1894 to December 18 Reprinted from Transactions of
Birge Edmvard A and Chancey Juday
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abundant acid algae alkaline April ash free basis August autumn average bottom water catches cent centrifuge chemical chitin Cladocera contained copepod crude fiber crude protein cubic meter curve Cyclops Daphnia Daphnia hyalina decline decrease depth determinations diagram Diaptomus diatoms dissolved oxygen dry organic matter dry weight early epilimnion ether extract fixed carbon dioxid forms free carbon dioxid hectare hypolimnion increase July June kilograms kilograms per hectare Lake Kegonsa Lake Mendota Lake Monona Lake Waubesa large numbers larger liter lower water material meter of water milligrams per cubic nannoplankton of Lake nauplii nitrogen free extract number of Crustacea observations obtained October pentosans percentage of ash percentage of nitrogen period photosynthesis phytoplankton plankton of Lake pounds per acre quantity of organic rotifers samples season September silica smaller species spring strata stratum summer temperature thermocline tion total plankton upper water variation varied vertical distribution winter Wisconsin