The aim of this investigation is study of phytoplankton and saprobic index at warm water fishes ponds at East of Golestan province, Gonbade Kavous city. Phytoplankton and ciliate sampling was done monthly during one season culture from June to November 2011. Finally, 39 genuses from 7classes of phytoplankton's and 4 genuses from ciliate group were identified. Although, Between different classes...