Studies on the biomass and production of the dominant zooplankton were done in Lake Kurifturnfrom August, 2008 to May, 2009. The cyclopoid copepod (Thermocyclops consimilis)rnconstituted 71% in abundance in Lake Kuriftu, but cladocerans and rotifers are also presentrnalmost in equal proportions. Brachionus calyciflorus (12%) was the second dominant speciesrnnext to T. consimilis. T. consimilis was raised in the laboratory to obtain life historyrninformation (duration of embryonic and post-embryonic development) at 20 and 25.90C, andrnfed mixed algal food enhanced with F/2 culture medium. Laboratory data on the duration ofrndevelopment and biomass, together with population abundance data obtained in the field, werernused to estimate the biomass and production of this species in Lake Kuriftu. The mean biomassrnand production of T. consimilis, attained during the study period, were 23.8 mg dry weightrn(DW) m-3 and 0.78 mg DW m-3day-1, respectively with daily and annual P:B ratio 0.033andrn13.10, respectively. The dry mass of B. calyciflorus was determined from its biovolume byrnapproximating the nearest geometric formula. Dry weight and recruitment of new individualsrnwere used to calculate the production of B. calyciflorus. The mean biomass and production ofrnthis species were 629.66 Î¼g DW m-3 and 180.38 Î¼g DW m-3 day-1, respectively with daily andrnannual P:B ratio 0.29 and 21.31, respectively. Zooplankton production rates were lowrncompared to values reported in the literature for the same or other species of equivalent sizedrncopepods, from both tropical and subtropical regions.