International Science Community Association International Research Journal of Environmental Sciences 2319 - 1414 4 8 2015 August 22 Taxonomical study and Diversity of Rotifers in Chikkadevarayana canal of Cauvery river, Karnataka, India 13 21 EN Kyayesimira Juliet 1 Department of Biological Sciences, Kyambogo University, UGANDA Lejju JuliusB. 2 Department Biology, Mbarara University of Science and Technology, UGANDA Prasad M.S.V.K.V. 1 Swarnandhra Engineering College, Narsapur, A.P., INDIA G.Siva Praveena 2 Dept. of Environmental sciences, Andhra University, Visakhapatnam, A.P., INDIA Prasad Ch.Durga 3 Rao P.V.V.Prasada 4 Venkataramana G.V. 1 Department of Studies in Environmental Science, University of Mysore, Manasagangotri, Mysore-570006, INDIA P.N SandhyaRani 2 Smitha 3 > Research Paper 2015 3 31 2015 August 22 The study was undertaken to assess the diversity and taxonomical observations of rotifers in Chikkadevaraya canal (CDC). The investigation revealed that 27 species belonging to 15 genera and 9 families coming under 3 orders and 2 classes, were observed, photographed and also identified up to species level and are reported for the first time in this region. Among 22 genera of rotifers, the maximum of 11 species belonged to family Brachionidae followed by 5 species from family Lecanidae, 2 species of Euchlanidae, Collurellidae, Notommatidae and Philodinidae respectively. One species each from family Trichocercidae, Testudinellidae and Filinidae. The genus Brachionus, Keratella and Euchlanis was found in all the five sampling points. Euchlanis dialata was abundant while Macrotrachela quadricornifera was found to be least. Species abundance was higher at Gandehosahalli followed by Darsaguppe, Kannalu, Edmuri and lowest in Pandavapura sampling stations. Shannon’s diversity was also found to be highest at Gandehosahalli (2.63) while low in Pandavapura (1.78). The samples of water were used to conduct physico-chemical parameters like temperature, electrical conductivity, pH, dissolved oxygen, total alkalinity, total hardness, chlorides, total solids, total dissolved solids, total suspended solids, sulphate, phosphate and nitrate etc. Statistical interpretations of data were presented based on correlation analysis. The population of rotifes were positively correlated with pH, total alkalinity, hardness and negativly correlated with total suspended solids and total solids of water samples. Copyright@ International Science Community Association