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:: Volume 11, Issue 3 (7-2012) ::
IJFS 2012, 11 Back to browse issues page
Annual cycle of ovarian development and sex hormones of grey mullet (Mugil cephalus) in captivity
S. Yelghi , S. A. Shirangi, R. Ghorbani, H. A. Khoshbavar Rostami
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Abstract:   (17006 Views)
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<0.05). Although Biochemical parameters concentrations in blood serum of grey mullet diminished significantly until third stage of sexual maturity (P< 0.05), their level showed a rising trend at the fourth stage. A significant increase was observed in the serum protein and cholesterol concentrations (P<0.05), while, in contrast, serum Calcium ion and triglyceride levels didn’t have significant differences in third and fourth stages of sexual development (P> 0.05). These results suggest that the seasonal changes in serum lipids and gonadal steroids were associated with reproductive development. The data also support the hypothesis that the shortening photoperiod is a major factor in stimulating reproductive activity in striped mullet.
Keywords: Mugil cephalus, Ovarian development, Sexual steroid hormones, Captivity
Full-Text [PDF 560 kb]   (3315 Downloads)    
Type of Study: Orginal research papers | Subject: Biology & physiology
Received: 2012/09/1 | Accepted: 2015/09/13 | Published: 2015/09/13
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Yelghi S, Shirangi S A, Ghorbani R, Khoshbavar Rostami H A. Annual cycle of ovarian development and sex hormones of grey mullet (Mugil cephalus) in captivity. IJFS. 2012; 11 (3) :693-703
URL: http://jifro.ir/article-1-639-en.html


Volume 11, Issue 3 (7-2012) Back to browse issues page
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
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