Umakant, Pandharinath Kamble
2012 Indian Journal of Fundamental and Applied Life Sciences   unpublished
Free living protozoa are the excellent model for providing the information about the vital process of life. They play a key role in the ecosystem defining and designing the nature saprobes, protozoa are the reliable indicator of pollution. They help in improvement of water quality. The present study regarding water quality of taxonomic importance will be a landmark to create the awareness in the masses of the society. The biodiversity of protozoa changes from place to place and time to time,
more » ... nd time to time, because of environmental make-up. Their presence, absence and abundance classifies the water quality (Chandraprakash 1983).Protozoan are free living as well as parasitic. Free living protozoans are present in vast number in nature and in great variety of habitats. The minute size, multiplication and formation of various stages facilitate their wide distribution in all possible environmental condition(Barkelo and calkins 1980).In free living aquatic protozoa most of them are ciliates. Many species of ciliated protozoa are used as indicator for the ecological monitoring of water quality. And they can also be used in ecological studies of aquatic habitats in which mosquitoes and intermediate hosts of disease causing organisms are breeding (Bhatia, 1936 and Bick, 1972). INTRODUCTION Protozoans are unicellular, eukaryotic organisms that are placed in kingdom Protista. The word protozoa comes from the Greek word 'protos and zoon 'meaning "first animal, are eukaryotic Protists. They occur generally as single cells and may be distinguished from other eukaryotic Protists by their ability to move at some stages of their life cycle and by their lack of cell wall Protozoa are predominantly microscopic in size. The majority are between 5 and 250 um in diameter. Colonies of protozoa also occur in a protozoan colony; the individual cells are joined by cytoplasmic threads or are embedded in a common matrix. Thus colonies of protozoa are essentially aggregates of independent cells. The study of these eukaryotic Protists called Protozoology. By a conservative estimate, there are more than 65,000 described species of protozoa distributed among seven named phyla. Curde et al., (1973) and built small-scale, activated sludge plant in which protozoa were present. The result were quite clear, the presence of protozoa reduced the amount of organic material, the viable count of bacteria and the turbidity of the effluent. This result indicated that protozoa represent a necessary component in the efficient biological treatment of sewage.