en Ecology Ecology پژوهشي Orginal research papers <p dir="ltr" style="text-align: justify;">This study was performed to compare the efficiency of six microalgae namely <em>Dunaliella tertiolecta</em>, <em>Tetraselmis suecica,</em> <em>Nannochloropsis oculata,</em> <em>Chaetoceros </em>sp<em>., Chlorella </em>sp. and<em> Spirolina </em>sp<em>. </em>on the growth, survival rate and reproduction efficacy in <em>Artemia urmiana</em> in laboratory conditions. <em>Artemia</em> cysts were harvested from Urmia Lake and hatched according to the standard method. Live microalgae were cultured using the f/2 culture medium. <em>Artemia</em> survival was determined in treatments on days 8, 11, 14, 17 and 20. A highly significant difference (<em>p</em><0.01) were found among three microalgae in terms of length growth, survival rates and reproduction characteristics in <em>A. urmiana</em>. In spite of higher length growth of <em>A.urmiana</em> fed on <em>N. oculata</em> than <em>A. urmiana</em> fed by <em>T. suecica</em> but survival and reproduction in the latter was better than the first treatment. In general, <em>D. tertiolecta</em> was more efficient than other microalgae examined in the present study on <em>A. urmiana</em> concerning not only to growth and survival but also to reproduction mode. So, it is preferred to feed <em>A. urmiana</em></p> Artemia urmiana, Microalgae, Length growth, Survival rate 727 737 http://jifro.ir/browse.php?a_code=A-10-1272-195&slc_lang=en&sid=1 F. Mohebbi mohebbi44@gmail.com 100319475328460016071 100319475328460016071 Yes M. Hafezieh 100319475328460016072 100319475328460016072 No M. Seidgar 100319475328460016073 100319475328460016073 No H. Hosseinzadeh Sahhafi 100319475328460016074 100319475328460016074 No A. Mohsenpour Azari 100319475328460016075 100319475328460016075 No R. Ahmadi 100319475328460016076 100319475328460016076 No