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Accelerated of Sex Reversal use 17α-methyltestosterone Induced Female, Orange-Spotted Grouper Epinephelus coioides
Corresponding Author(s) : Odang Carman
Jurnal Ilmiah Perikanan dan Kelautan, Vol. 15 No. 2 (2023): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Abstract
Highlight Research
- Sex reversal for orange-spotted grouper Epinephelus coioides
- The application of 17α-methyltestosterone induce sex change
- The stability of sex change need more investigation
Abstract
The occurance of hermaphrodites in grouper fish causes a scarcity of male parents, so an alternative is needed to accelerate sexchange to male at a young age. The present study was expected to scrutinize the mechanisms of sex-change in fish in the early change process, and whether the testis converted from immature ovary using 17α-methyltestosterone (MT) would recover after the termination of MT treatment. MT-induced sex-change and 5-aza-2'-deoxycytidine (5-Aza) were connected as DNA methylation inhibitors to comprehend the alternation of gonadal soma cells. The orange-spotted groupers were used at the developmental ages and fed a diet containing MT at 50 mg/kg for three months and then a normal diet for a month. In the first week and second week fish injected with 5-Aza intraperitoneally during the MT-oral administration. Most of the fishes in the control group had immature ovaries, but all the females fed with MT, had immature spermatogenesis. However, one month after the withdrawal of MT treatment, the sex of the fish returned to female-like even though the fish have undergone MT-induced masculinization. This outcome demonstrates precocious sex-change from under yearling, orange-spotted grouper utilizing oral MT treatment is impermanent. All the females of 5-aza treatments showed no spermatogenic cells. In this study, lower growth rates were demonstrated by the MT-treated groups. The impact of this metabolic change was clear after the end of the hormone oral administration since the decreased growth of the groups treated for three months.
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References
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Aoki, Y., Nakamura, S., Ishikawa, Y., & Tanaka, M. (2009). Expression and syntenic analyses of four nanos genes in medaka. Zoological Science, 26(2):112-118.
Bancroft, J. D., & Cook, H. C. (1994). Manual of histological techniques and their diagnostic application. London: Churchill Livingstone.
Bellaiche, J., Lareyre, J.-J., Cauty, C., Yano, A., Allemand, I., & Le Gac, F. (2014). Spermatogonial stem cell quest: nanos2, marker of a subpopulation of undifferentiated A spermatogonia in trout testis. Biology of Reproduction, 90(4):71-79.
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Blazer, V. S. (2002). Histopathological assessment of gonadal tissue in wild fishes. Fish Physiology and Biochemistry, 26:85-101.
Blázquez, M., Piferrer, F., Zanuy, S., Carrillo, M., & Donaldson, E. M. (1995). Development of sex control techniques for European sea bass (Dicentrarchus labrax L.) aquaculture: Effects of dietary 17 α-methyltestosterone prior to sex differentiation. Aquaculture, 135(4):329-342.
Cardwell, J. R., & Liley, N. R. (1991). Hormonal control of sex and color change in the stoplight parrotfish, Sparisoma viride. General and Comparative Endocrinology, 81(1):7-20.
Chan, S. T. H., & Yeung, W. S. B. (1983). 4 sex control and sex reversal in fish under natural conditions. Fish Physiology, 9(Part B):171-222.
Chang, C. F., Lau, E. L., & Lin, B. Y. (1995). Estradiol-17β suppresses testicular development and stimulates sex reversal in protandrous black porgy, Acanthopagrus schlegeli. Fish Physiology and Biochemistry, 14(6):481-488.
Chen, F. Y., Chow, M., Chao, T. M., & Lim, R. (1977). Artificial spawning and larval rearing of the grouper, Epinephelus tauvina (Forskal) in Singapore. Singapore Journal of Primary Industries, 5(1):1-21.
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Li, Y., Liu, F. (2021). DNA methylation rehapes sex development in zebrafish. Genomics Proteomics Bioinformatics, 19: 44-47.
Li, G. L., Liu, X. C., & Lin, H. R. (2006). Effects of aromatizable and nonaromatizable androgens on the sex inversion of red-spotted grouper (Epinephelus akaara). Fish Physiology and Biochemistry, 32(1):25-33.
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Murata, R., Kobayashi, Y., Karimata, H., Kishimoto, K., Kimura, M., & Nakamura, M. (2014). Transient sex change in the immature Malabar grouper, Epinephelus malabaricus, androgen treatment. Biology of Reproduction, 91(1):21-25.
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Nakamura, M., Bhandari, R. K., & Higa, M. (2003). The role estrogens play in sex differentiation and sex changes of fish. Fish Physiology and Biochemistry, 28(1):113-117.
Nakamura, S., Kobayashi, K., Nishimura, T., Higashijima, S., & Tanaka, M. (2010). Identification of germline stem cells in the ovary of the teleost medaka. Science, 328(5985):1561-1563.
Navarro-Martin, L., Vinas, J., Ribas, L., Diaz, N., Gutierrez, A., Croce, L. D., Piferrer, F. (2011). DNA methylation of the gonadal aromatase (cyp19a) promotor is involved in temperature-dependent sex ratio shifts in the European sea bass. PloS Genetics, 12:1002447.
Nirmala, A. R. C., & Pandian, T. J. (1983). Effect of steroid injection on food utilization in Channa striatus. Proceedings: Animal Science, 92:221-229.
Oh, S. R., Kang, H. C., Lee, C. H., Hur, S. W., & Lee, Y. D. (2013). Sex reversal and masculinization according to growth in longtooth grouper Epinephelus bruneus. Development & Reproduction, 17(2):79-85.
Overturf, K. (2009). Molecular research in aquaculture. New Jersey: Blackwell Publishing.
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