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The Persian sturgeon,Acipenser persicus, is an endangered species the southern part of Caspian Sea, especially along the shores of Iran. During the few past decades many attempts have been made to augment their stocks in terms of supportive breeding in Iran. Successful management of sturgeon populations requires knowledge of the stock composition with regard to sex and maturational status. One of the problems in sturgeon broodstock is the slow and asynchronous ovarian maturation.Plasma sex steroid, vitellogenin (VTG, an egg protein precursor), and calcium profiles have provided valuable insights in to the reproductive cycles of sturgeon populations.