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(Chemical Oxygen Demand) parameter was measured on same location, for a while phytoplankton and heterotrophyc bacteria data from secondary data. There were five genus zooplankton, namely Ceriodaphnia (Cladocera), Diaptomus, Cyclops (Copepoda), Brachionus and Filinia (Rotifera). It was not found zooplankton at rivers, therefore average of abundance in lake water body ranged 37 - 376 ind.l-1, and based of depth stratum their abundance show to maximize at three meters depth. Zooplankton abundance seem correlate support factors quadratically, positively to COD and abundance of heterothrophyc bacteria, but negatively to phytoplankton abundance.
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