| Effect of 17 α-methyltestosteron, aromasin and green light radiation on the production of all male populations and some indicators of reproduction and growth in swordtail (Xiphophorus helleri) |
| Paper ID : 1060-ICIAQUA |
| Authors |
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Kimia . Alaei *1, Ali Hajibeglou2, Vali ollah Jafari3, Seyed Hossein Hoseinifar3, Ali Jafar4 1PhD Student in Aquatic Biotechnology, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources 2Member of the Faculty of Aquatic Reproduction and Breeding and vice president of Gorgan University of Agricultural Sciences and Natural Resources 3Member of the Faculty of Aquatic Reproduction and Breeding, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources 4Ph.D. Department of Fisheries |
| Abstract |
| In cases such as sexual maturation and reproduction in aquatic animals, this has a significant negative impact on the production process. The aim of this study was to investigate the effect of the hormone 17 alpha-methyltestosterone at a dosage (300, 400 and 500 mg/kg per feed), of aromasin at a dosage (30, 45 and 60 mg/kg per feed), of green light radiation (in the form of 12h light of and 12h of darkness) and a negative control (without gelatine) on the production of all-male populations and some reproductive and growth indices in swordtail (Xiphophorus helleri) in two parts of female pre-reproductive fish and larvae with active feeding at same time. In the first phase, the number of 12 pre-generative pieces of female swordtail and in the second phase, the number of 50 pieces of larvae with active feeding were carried out in 8 experimental treatments together with the control treatment (with gelatin) each with 3 replicates in a period of 95 days. Statistical analysis of the data was performed using Spss software, Duncan's test and one-way test of variance (ANOVA) and the coefficient of significance was P<0.05. Accordingly, no significant difference was found in the measurement of length and final weight (P>0.05). The amount of testosterone, estradiol and progesterone was not significantly different from the control groups in the larvae did. The amount of testosterone, estradiol and progesterone was not differ significantly from the control groups. In addition, the highest testosterone, estradiol and progesterone levels were found in broodstock in the test groups. According to the results of this study, Aromasin may be a suitable alternative for the hormone 17 α-methyltestosterone to induce masculinization in two life stages of swordtail. |
| Keywords |
| Xiphophorus helleri, Green light radiation, Aromatase inhibitor, Aromasin, 17α-methyltestosterone hormone, Propagation and cultivation of ornamental aquatic animals |
| Status: Abstract Accepted (Poster Presentation) |