The effects of 17-β estradiol administration on growth and sex reversal Three-spot gourami (Trichogaster trichopterus)

Document Type : Physiology (Animal)

Authors

1 Fishery Science, Department of Fishery and Environment, Gorgan University of Agricultural Sciences and Natural Resources

2 Department of fisheries, Islamic Azad University Qaemshahr Branch, Iran

3 Department of Fisheries, Gorgan University of Agricultural Sciences and Natural Resources, Iran

Abstract

In this present study, 240 three-spot gourami (Trichogaster trichopterus) fallowing was exposed to 17-β estradiol at stage of development including prior to maturity (larvae) average (1.26±0.12 g). The 20 species per aquarium under the four treatments (0, 10, 25 and 50 mg per kg of food) in three replicates were performed in a period of 90 days. Hormone was added to fish food. Results showed that treatments had no significant difference in fish growth, which correlated with increased amounts of 17- β estradiol (P<0.05), but the most growth was observed in treatment 3 (25 mg/kg of 17-β estradiol per fish). Also had no significant difference in number of white blood cells and hematocrit percentage between treatments (P<0.05). Although sex reversal was not significantly different from other treatments, it had increasing effect with increasing 17-β estradiol rate.  

Keywords

Journal of Animal Environment
Volume 8, Issue 3
December 2016
Pages 237-244

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