| Summary: | Zooplankton is a vital component of aquatic ecosystems and has become a significant aspect of research in estuarine areas or brackish water or freshwater. In the present study, the diversity of zooplankton was correlated with Physico-chemical characteristics brackish water at Chickan nearly 25 km in the north of Dadu City. Zooplanktons are important for the secondary types of animals. The selected area of water is very important to the community in the sense of fishing Chickan is a good feeding ground of important local and migratory birds. The study was carried out from January 2018 to 2018 December. During the study, period variations were observed in the content physicochemical parameters of the saline lake. Thus such variations in physicochemical parameters of the water may have adverse effects on the lower level creature.A large number of zooplankton such as rotifer recorded 58%, protozoan 28%, copepods found 36% and cladoceran were 6%. The maximum and minimum quantitative ranges are described. The highest temperature recorded is 36oC and the lowest 14oC in winter. The pH was recorded from 12.6 to 7.2. Transparency. Was 94 to 44 Hardness was found 190 to 325. And salinity was found 20.525% to11.5%. TDS were from 1248 to 1027 Dissolved Oxygen was 8.8 to6.1
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