fa تخصصي Special پژوهشي Research <pre style="text-align:justify"> <span style="font-size:10pt"><span style="line-height:120%"><span style="font-family:Consolas"><span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times=""><span style="color:black">Arak Mighan Wetland is one of the highest salt marshes in Iran, which is located in the center of the country at a distance of 8 kilometers to the northeast of Arak city, and it is considered one of the valuable sources of <i>Artemia</i> in the country. <i>Artemia</i> has a great nutritional value for feeding the sensitive larval and brood stages of shrimp, sturgeon, ornamental and marine fish.</span></span></span></span> <span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times=""><span style="color:black">In this study, 18 different stations were selected in Arak Mighan lagoon with the aim of evaluating the cyst and bio mass of <i>Artemia parthenogenetica</i>, during March 2018 to February 2019. The amounts of cysts, nauplii, metanapulii, female and male adult <i>Artemia</i> present in Mighan lagoon were determined. The maximum amounts of cysts (1076 cysts per liter) and the biomass of <i>Artemia</i> (42.22 nauplii per liter, 412.44 metanauplii per liter, 16.22 pieces per liter of adult female <i>Artemia</i> and 4.22 pieces per liter of adult male <i>Artemia</i>) were observed in December. Appropriate management solutions for the sustainable use of these valuable reserves require further investigations, taking into account the special and unstable conditions of Mighan wetland depending on each season and year. It is recommended to create an integrated management of the Mighan Lake catchment area in order to protect the lake and its biodiversity as a unique ecological resource and ecosystem.</span></span></span></span></span></span></span></pre> Artemia, Mighan lagoon, Cyst, Biomass 73 76 http://injbir.com/browse.php?a_code=A-10-1-11&slc_lang=fa&sid=1 M. Hafezieh No Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran A. Nekoueifard No National Artemia Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Urmia, Iran M. Seidgar Yes National Artemia Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Urmia, Iran Zh. Alizadeh Osalou No National Artemia Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Urmia, Iran Sh. Nahali No National Artemia Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Urmia, Iran