TY - JOUR T1 - Annual cycle of ovarian development and sex hormones of grey mullet (Mugil cephalus) in captivity TT - JF - IFRO JO - IFRO VL - 11 IS - 3 UR - http://jifro.ir/article-1-639-en.html Y1 - 2012 SP - 693 EP - 703 KW - Mugil cephalus KW - Ovarian development KW - Sexual steroid hormones KW - Captivity N2 - The grey mullet fingerling were imported to Iran in 1997 from Hong Kong and in coastal fish pond of north part of Iran were successfully cultured in order to obtain broodstocks and induce artificial reproduction. Seasonal changes in serum concentrations of Testosterone, 17-β Estradiole (E2), 17-α Hydroxy Progesterone and also the level of calcium, Triglyceride and cholesterol in females grey mullet in captivity were measured by Radioimmunoassay or colorimetry, respectively. Investigating of sex steroids in different sexual maturity indicated that increasing of oocyte diameter and sexual maturity development serum testosterone was increased significantly (P M3 ER -