Morphology,Identification methods, distribution and a list of various species of Cladocera in different areas of Anzali wetland.

This study was carried out in 27 study stations in Shijan, Siakishim, Abkenar, Hendekhaleh and Rogaha(River outlets), during conducting research hydrology and hydrobiology and preparing Atlas of plankton in the Anzali wetland during the years 1373(1994) from 1393(2014). Sampling was done by (P.V.C) tube, at each station, 30 liters of water were filtered by a Zooplankton net with 30 microns mesh. The samples were fixed with 4% formalin and then transferred to the laboratory and after quantitative and qualitative studies with inverted microscope were taken picture them by Nikon Labophot microscop. The results of Zooplankton study reveal that there are totally 12 Phylum that include 133 genera and 211 speices in Anzali wetland , of which ,14genera and 25 speices in Order Cladocera was identified , They are belongs to phylum Arthropoda. The body of this group is composed of chondroitin, which is attached to the posterior region and is open on the abdominal side. Qualitative studies of zooplankton in this project and quantitative studies in the hydrologic and hydrobiological project of Anzali wetland indicate that the population of this order has decreased significantly in recent years. The most frequent species of this sequence are Moina rectirostris, Alona rectangula and  Chydrus sphaericus, whose highest population is related to Abkenar and the southern Hendekhaleh regions in spring and summer.