Investigation of the distribution and frequency of plankton in lin with the development of aquaculture in Khandghloo Dam Lake

Lakes behind the dam are one of the most important structures for controlling and supplying water for different uses that can have wide environmental, social and economic effects. This quarterly study was conducted in 2011 with the aim of providing appropriate solutions for optimal and sustainable exploitation of the aquatic animals of Khandaghloo Reservoir Dam Lake. For phytoplankton sampling, one liter of water (unfiltered) and for sampling, zooplankton, also 30 liters of water from the station was collected by means of a 30 micron zooplankton net.The samples were fixed with formalin at a ratio of % 4 and identified and counted in the laboratory after preparation of the samples under an inverted microscope. In phytoplankton studies, 41 genera and 6 Phyla identified, including Cyanophyta, Bacillariophyta, Chlorophyta, Euglenophyta, Pyrrophyta and Xanthophyta, Cyanophyta with %74.3 had the highest percentage of phytoplankton population during the study. In zooplankton study, 4 Phyla and 11 genera were identified, which included the Phyla Rhizopoda, Ciliophora, Rotifera and Arthropoda, which have the highest percentage of zooplankton population belongs to the Phylum Rotifera with 67.7%. Comparison of planktonic observations and physical and chemical data of water, showed that Khandaghloo lake have talents and suitable planktonic species for feeding and rearing their fish. Thus, Natural reserves of this source can be used to increase the value of fishery fish.