Ecology of Cladocera, Copepoda and Ostracoda of a lentic ecosystem of Chapra Bihar

During present investigation, the primary peak of zooplankton population was observed in summer and secondary peak during winter at site 2, while at site 1, where the primary maxima was recorded in monsoon and winter months while the secondary maxima was in winter and summer during both the annual cycles, respectively. The maximum number of rotifer species was recorded during summer months which coincided with the period of high temperature agreeing with the findings of Michael(1963). Summer periodicity of rotifers in tropical ponds has also been recorded by George(1966).