EFFECTS OF 17 α-METHYLTESTOSTERONE AND TRIBULUS TERRESTRIS EXTRACT ON SEX RATIO AND GONADS HISTOLOGY OF RED TILAPIA HYBRID
Amer, M., Zaki, F., Tahoun, A., Said, M. (2021). EFFECTS OF 17 α-METHYLTESTOSTERONE AND TRIBULUS TERRESTRIS EXTRACT ON SEX RATIO AND GONADS HISTOLOGY OF RED TILAPIA HYBRID. EKB Journal Management System, 24(2), 189-198. doi: 10.21608/ejnf.2021.210947
M. A. Amer; Fatma M. Zaki; A. Tahoun; M. M. Said. "EFFECTS OF 17 α-METHYLTESTOSTERONE AND TRIBULUS TERRESTRIS EXTRACT ON SEX RATIO AND GONADS HISTOLOGY OF RED TILAPIA HYBRID". EKB Journal Management System, 24, 2, 2021, 189-198. doi: 10.21608/ejnf.2021.210947
Amer, M., Zaki, F., Tahoun, A., Said, M. (2021). 'EFFECTS OF 17 α-METHYLTESTOSTERONE AND TRIBULUS TERRESTRIS EXTRACT ON SEX RATIO AND GONADS HISTOLOGY OF RED TILAPIA HYBRID', EKB Journal Management System, 24(2), pp. 189-198. doi: 10.21608/ejnf.2021.210947
Amer, M., Zaki, F., Tahoun, A., Said, M. EFFECTS OF 17 α-METHYLTESTOSTERONE AND TRIBULUS TERRESTRIS EXTRACT ON SEX RATIO AND GONADS HISTOLOGY OF RED TILAPIA HYBRID. EKB Journal Management System, 2021; 24(2): 189-198. doi: 10.21608/ejnf.2021.210947

EFFECTS OF 17 α-METHYLTESTOSTERONE AND TRIBULUS TERRESTRIS EXTRACT ON SEX RATIO AND GONADS HISTOLOGY OF RED TILAPIA HYBRID

Egyptian Journal of Nutrition and Feeds
Article 23, Volume 24, Issue 2, November 2021, Page 189-198  XML PDF (1.04 MB)
Document Type: Original Article
DOI: 10.21608/ejnf.2021.210947
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Authors
M. A. Amer1; Fatma M. Zaki2; A. Tahoun2; M. M. Said2
1Department of Animal Production, Faculty of Agriculture, Ain shams University, Cairo, Egypt
2Department of Aquaculture, Faculty of Fish Resources, Suez University, Suez, Egypt
Abstract
Tribulus terrestris extract and 17α-methyltestosterone were added into the diets of red tilapia fry with an initial average weight of 0.02 ± 0.003g and an average length of 0.6 ± 0.012cm to study their effects on sex reversal and gonads histology. Two T. terrestris extract treatments (1 and 2g/kg diet); three hormonal treatments of 17α-methyltestosterone (30, 60 and 100 mg/kg diet) were used in this study and a control group, the study lasted 112 days. Results showed that T. terrestris extract and 17α-MT has a potential effect on directing gonadal sex differentiation of red tilapia towards males depending on the dose applied. The highest male percentage 90% was obtained by 60 mg 17α-MT /kg diet followed by 2g T. terrestris / kg diet (84.40%). Histological examination of the gonads showed a clear deterioration in their structure as a result of hormonal therapy, the intensity of which increased with an increase in the hormonal dose. The effect from using a high dose of T. terrestris was slight. It can be concluded that the addition of T. terrestris extract and 17α-MT to the ration of red tilapia hybrid fry directs the gonads of red tilapia towards males and negatively affects the structure of the gonads.
Keywords
Red tilapia; gonads histology; 17α-methyltestosterone; Tribiulus terrestris; sex reversal
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