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Steroid Hormone Profile and Sperm Quality of Silver Pompano (Trachinotus blochii) Fed Tribullus terrestris Extract and Gonadotropin Hormone
Corresponding Author(s) : Munti Sarida
Jurnal Ilmiah Perikanan dan Kelautan, 2025: IN PRESS ISSUE (JUST ACCEPTED MANUSCRIPT, 2025)
Abstract
Graphical Abstract
Highlight Research
1. Hormonal approaches are needed for the maturation of the broodstock's gonads;
2. The use of gonad maturation stimulants, both hormonal and herbal, in the aquaculture sector has been widely used, where hormonal and phyto-biotic induction can enhance gonad maturation in fish.
3. The use of phyto-biotic, such as Tribulus terrestris, has been tested to enhance reproduction in fish.
4. Feeding Tribulus terrestris extract enhances the reproductive performance of male silver pompano broodstock by improving weight growth, testosterone levels, gonad maturation, and sperm volume.
Abstract
Male broodstock of silver pompano often exhibit delayed gonadal development, which prolongs the broodstock maintenance period and increases production costs. To address this issue, dietary supplementation with bioactive compounds and hormonal inducers has been explored to stimulate reproductive maturation. Among these, plant-derived extracts such as Tribulus terrestris and exogenous hormones like human Chorionic Gonadotropin (hCG) are of interest due to their potential to enhance steroidogenesis and accelerate gonadal development. This study examined the impact of T. terrestris extract (ETT) and hCG on the steroid hormone profile, sperm quality, and gonadal histology of male silver pompano. Five treatment groups were established with varying ETT (mg/kg of diet) and hCG (IU/kg of body): T1 (0 + 0), T2 (50 + 0), T3 (250 + 0), T4 (50 + 1000), and T5 (250 + 500), each replicated eight times. Results revealed that ETT at 250 mg/kg (T3) significantly improved reproductive parameters, including absolute weight gain, gonadal development, and semen volume. Histological analyses further indicated advanced stages of gonadal maturation in treated groups, accompanied by increased plasma testosterone levels, which stimulated spermatogenesis and sperm cell formation. Optimal sperm quality—characterized by enhanced motility and seminal volume—was observed at the T3 dosage, although sperm density showed limited variation. These findings underscore the potential of T. terrestris extract as a practical dietary strategy to enhance reproductive efficiency in silver pompano aquaculture, contributing to improved productivity and sustainability. Further studies are recommended to refine dosages and ensure consistent outcomes across production systems.
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- Abinawanto, A., Lestari, S., Bowolaksono, A., Dwiranti, A., Lestari, R., Gustiano, R., & Kristanto, A. H. (2023). The effect of different honey concentrations on the ultrastructure profile of spermatozoa in Dewa Mahseer (Neolissochilus soro). Biodiversitas Journal of Biological Diversity, 24(2):1025-1031.
- Ahmed, I., Jan, K., Fatma, S., & Dawood, M. A. O. (2022). Muscle proximate composition of various food fish species and their nutritional significance: A review. Journal of Animal Physiology and Animal Nutrition, 106(3):690-719.
- Akbari, N. E., Gorouhi, D., & Falahatkar, B. (2024). Efficacy of sGnRHa in combination with domperidone on the sperm quality, seminal fluid metabolites, and fertilization ability of spermatozoa in Caspian kutum, Rutilus frisii. Aquaculture International, 32(1):817-832.
- Aydin, İ., Öztürk, R. Ç., Polat, H., Beken, A. T., Terzi, Y., Özel, O. T., Erbay, E. A., Düzgüneş, Z. D., Altuntaş, A., & Küçük, E. (2022). Sperm characteristics of wild-caught and hatchery-reared turbot, Scophthalmus maximus, originated from the Black Sea. Journal of Applied Ichthyology, 38(1):73-83.
- Badran, M. F., El-Danasoury, M. A., & Sharaf, S. M. (2015). Hormonal induced spawning of marine sea bass Dicentrarchus labrax L. Journal of Animal, Poultry and Fish Production, 3(1):1-5.
- Caldas, J. S., da Silva, A. L., de Sousa, L. M., de Sousa, E. B., Monteiro, I. L. P., de Barros, F. J. T., & Godoy, L. (2021). Effects of hormonal treatment on induced spermiation and semen quality in the endangered Amazonian fish Hypancistrus zebra (Siluriformes, Loricariidae). Aquaculture, 533(4):1- 6.
- Ciji, A., Sharma, P., Rajesh, M., Kamalam, B. S., Sharma, A., Dash, P., & Akhtar, M. S. (2021). Intra-annual changes in reproductive indices of male and female Himalayan snow trout, Schizothorax richardsonii (Gray, 1832). Aquaculture Research, 52(1):130-141.
- Dawood, M. A. O. (2021). Nutritional immunity of fish intestines: Important insights for sustainable aquaculture. Reviews in Aquaculture, 13(1):642-663.
- Dhas, S. A., Selvaraj, T., Citarasu, T., Punitha, S. M. J., & Babu, M. M. (2015). Effect of supplemented diet with maturation plant extract on reproductive performance of Etroplus suratansis. Aquaculture Reports, 2(1):58-62.
- Do, J., Choi, S., Choi, J., & Hyun, J. S. (2013). Effects and mechanism of action of a Tribulus terrestris extract on penile erection. Korean Journal of Urology, 54(3):183-188.
- Dziewulska, K., Rzemieniecki, A., & Domagała, J. (2008). Basic physico-chemical parameters of milt from sea trout (Salmo trutta m. trutta), brook trout (Salvelinus fontinalis) and rainbow trout (Oncorhynchus mykiss). Journal of Applied Ichthyology, 24(4):497-502.
- Ebeneezar, S., Vijayagopal, P., Srivastava, P. P., Gupta, S., Varghese, T., Prabu, D. L., Chandrasekar, S., Varghese, E., Tejpal, C. S., Anikuttan, K. K., Sayooj, P., & Wilson, L. (2020). Optimum dietary methionine requirement of juvenile silver pompano, Trachinotus blochii (Lacepede, 1801). Animal Feed Science and Technology, 268(10):1-13.
- El-Greisy, Z. A., & El-Gamal, A. E. (2012). Monosex production of tilapia, Oreochromis niloticus using different doses of 17α-methyltestosterone with respect to the degree of sex stability after one year of treatment. Egyptian Journal of Aquatic Research, 38(1):59-66.
- El-Kady, M. A., Hussein, M. S., Abd-Elghany, M. F., & Mabrouk, M. M. (2022). Effect of adding Tribulus terrestris extract to the diets of nile tilapia Oreochromis niloticus larvae on sex ratio and growth performance. Al-Azhar Journal of Agricultural Research, 47(1):123-132.
- Falahatkar, B., Nargesi, E. A., Efatpanah, I., & Żarski, D. (2022). The effectiveness of human chorionic gonadotropin in stimulation of second spermiation in pikeperch Sander lucioperca during the spawning season. Animal Reproduction Science, 245(10):1-10.
- FAO. (2022). The state of world fisheries and aquaculture. towards blue transformation. Rome: Food and Agriculture Organization of the United Nations.
- Gamblin, A. P., & Morgan‐Smith, R. K. (2020). The characteristics of seminal fluid and the forensic tests available to identify it. Wiley Interdisciplinary Reviews: Forensic Science, 2(3):1-13.
- Handrianto, R., Razai, T. S., & Putra, W. K. A. (2017). The effect of human chorionic gonadotropin HCG and pregnant mare serum gonadotropin (PMSG) on gonad maturation of star pomfret fish Trachinotus blochii. Jurnal Intek Akuakultur, 1(2):16-22.
- Hartami, P., Hartami, P., Mahdaliana, M., & Ayuzar, E. (2022). Production of Clarias gariepinus seeds through accelerated female broodstock rematuration. Depik, 11(1):34-41.
- Hassona, N. N., Zayed, M. M., Eltras, W. F., & Mohamed, R. A. (2020). Dietary supplementation of Tribulus terrestris extract improves growth and reproductive performances of the male Nile tilapia (Oreochromis niloticus). Aquaculture Research, 51(10):4245-4254.
- Homrum, E., Óskarsson, G. J., Ono, K., Hølleland, S., & Slotte, A. (2022). Changes towards stable good somatic condition and increased gonad investment of Norwegian spring-spawning herring (Clupea harengus) after 2005 are linked to extended feeding period. Frontiers in Marine Science, 9(1):1-19.
- Honji, R. M., Araújo, B. C., Caneppele, D., Nostro, F. L. Lo, & Moreira, R. G. (2022). Dynamics of ovarian maturation during the annual reproductive cycle of the endangered fish Steindachneridion parahybae (Siluriformes: Pimelodidae) in captivity. Journal of Fish Biology, 101(1):55-68.
- Knowles, J., Boryshpolets, S., Kholodnyy, V., Rahi, D., Vysloužil, J., Muselík, J., Stejskal, V., Kouřil, J., & Podhorec, P. (2022). Effects of gonadotropin-releasing hormone agonist administered in microparticles on sperm quality and quantity, and plasma sex steroid levels in northern pike. Animal, 16(1):1-8.
- Li, W., Xiong, Y., Wang, Z., Zhang, Q., Shen, X., Liu, Q., Yan, H., Gao, R., Liu, Y., Pang, H., & Wang, X. (2023a). Effects of different photoperiod conditions on survival, growth, and gonadal development of Takifugu rubripes adults. Aquaculture, 564(4):1-16.
- Li, Y., Yang, H., Li, Z., Li, S., & Li, J. (2023b). Advances in the biosynthesis and molecular evolution of steroidal saponins in plants. International Journal of Molecular Sciences, 24(3):1-19.
- Mansour, A. T., Alsaqufi, A. S., Omar, E. A., El-Beltagi, H. S., Srour, T. M., & Yousef, M. I. (2022). Ginseng, tribulus extracts and pollen grains supplementation improves sexual state, testes redox status, and testicular histology in Nile tilapia males. Antioxidants, 11(5):875-880.
- Maulianawati, D., Awaludin, A., & Rachmawati, M. (2021). Development of catfish and tilapia cultivation through the application of feed modification technology with katuk leaf extract, artificial spawning, and sexreversal in Karang Harapan Village, Tarakan City, North Kalimantan. Indonesian Collaboration Journal of Community Services (ICJCS), 1(4):254-261.
- Merino, O., Risopatrón, J., Valdebenito, I., Figueroa, E., & Farías, J. G. (2023). Effect of the temperature of activation medium on fish sperm quality: Impact on fertilization in vitro in aquaculture practice. Reviews in Aquaculture, 15(2):434-451.
- Putra, W. K. A, & Razai, T. S. (2017). Effect of pure and combine hormone of pregnant mare serum (PMSG) on gonadosmatic index, hepatosomatic index of silver pompano fish (Trachinotus blochii). Journal of Aquaculture Science, 2(1):61-71.
- Putra, W. K. A., & Raza’i, T. S. (2020). Hormonal induction maturation of silver pompano Trachinotus blochii. Jurnal Akuakultur Indonesia, 19(1):61-73.
- Saha, N., Koner, D., & Sharma, R. (2022). Environmental hypoxia: A threat to the gonadal development and reproduction in bony fishes. Aquaculture and Fisheries, 7(5):572-582.
- Saiyed, A., Jahan, N., Makbul, S. A. A., Ansari, M., Bano, H., & Habib, S. H. (2016). Effect of combination of Withania somnifera Dunal and Tribulus terrestris Linn on letrozole induced polycystic ovarian syndrome in rats. Integrative Medicine Research, 5(4):293-300.
- Santos, H. O., Howell, S., & Teixeira, F. J. (2019). Beyond tribulus (Tribulus terrestris L.): The effects of phytotherapics on testosterone, sperm and prostate parameters. Journal of Ethnopharmacology, 235(1):392-405.
- Sarida, M., Lusiani, L., Putri, A. Y., Elisdiana, Y., & Adiputra, Y. T. (2025). Early gonadal differentiation, sex ratio, and growth performance of nile tilapia (Oreochromis niloticus) with Tribulus terrestris extract supplementation. Journal of Aquaculture and Fish Health, 14(1):103-113.
- Shahid, M., Riaz, M., Talpur, M. M. A., & Pirzada, T. (2016). Phytopharmacology of Tribulus terrestris. Journal of Biological Regulators and Homeostatic Agents, 30(3):785-788.
- Sultana, T., Mazumder, S. K., Kubra, J., Nishad, N., Khalil, S. M. I., Das, S. K., Khan, M. A. R., & Hasan, M. T. (2023). A multidisciplinary method to assess the reproductive biology of Mystus bleekeri. Aquaculture and Fisheries, 8(3):280-287.
- Sun, J. L., Song, F. B., Wang, L., Zhang, W. W., Chen, Y. M., Zhou, L., Gui, J. F., & Luo, J. (2022). Sexual size dimorphism in golden pompano (Trachinotus blochii): Potential roles of changes in energy allocation and differences in muscle metabolism. Frontiers in Marine Science, 9(1):1-18.
- Swaroop, A., Maheshwari, A., Verma, N., Tiwari, K., Kumar, P., Bagchi, M., Preuss, H. G., & Bagchi, D. (2017). A novel protodioscin-enriched fenugreek seed extract (Trigonella foenum-graecum, family Fabaceae) improves free testosterone level and sperm profile in healthy volunteers. Functional Foods in Health and Disease, 7(4):235-245.
- Tang, U., Amin, B., Sukendi, S, & Pamukas, N. A. (2020). Osmotic performance rate, stress response and growth performance of silver pompano (Trachinotus blochii) reared in different salinities using recirculating culture. AACL Bioflux, 13(3):1546-1556.
- Walker, W. H. (2021). Androgen actions in the testis and the regulation of spermatogenesis. Advances in Experimental Medicine and Biology, 1288(1):175-203.
- Zhu, W., Du, Y., Meng, H., Dong, Y., & Li, L. (2017). A review of traditional pharmacological uses, phytochemistry, and pharmacological activities of Tribulus terrestris. Chemistry Central Journal, 11(1):1-16.
References
Abinawanto, A., Lestari, S., Bowolaksono, A., Dwiranti, A., Lestari, R., Gustiano, R., & Kristanto, A. H. (2023). The effect of different honey concentrations on the ultrastructure profile of spermatozoa in Dewa Mahseer (Neolissochilus soro). Biodiversitas Journal of Biological Diversity, 24(2):1025-1031.
Ahmed, I., Jan, K., Fatma, S., & Dawood, M. A. O. (2022). Muscle proximate composition of various food fish species and their nutritional significance: A review. Journal of Animal Physiology and Animal Nutrition, 106(3):690-719.
Akbari, N. E., Gorouhi, D., & Falahatkar, B. (2024). Efficacy of sGnRHa in combination with domperidone on the sperm quality, seminal fluid metabolites, and fertilization ability of spermatozoa in Caspian kutum, Rutilus frisii. Aquaculture International, 32(1):817-832.
Aydin, İ., Öztürk, R. Ç., Polat, H., Beken, A. T., Terzi, Y., Özel, O. T., Erbay, E. A., Düzgüneş, Z. D., Altuntaş, A., & Küçük, E. (2022). Sperm characteristics of wild-caught and hatchery-reared turbot, Scophthalmus maximus, originated from the Black Sea. Journal of Applied Ichthyology, 38(1):73-83.
Badran, M. F., El-Danasoury, M. A., & Sharaf, S. M. (2015). Hormonal induced spawning of marine sea bass Dicentrarchus labrax L. Journal of Animal, Poultry and Fish Production, 3(1):1-5.
Caldas, J. S., da Silva, A. L., de Sousa, L. M., de Sousa, E. B., Monteiro, I. L. P., de Barros, F. J. T., & Godoy, L. (2021). Effects of hormonal treatment on induced spermiation and semen quality in the endangered Amazonian fish Hypancistrus zebra (Siluriformes, Loricariidae). Aquaculture, 533(4):1- 6.
Ciji, A., Sharma, P., Rajesh, M., Kamalam, B. S., Sharma, A., Dash, P., & Akhtar, M. S. (2021). Intra-annual changes in reproductive indices of male and female Himalayan snow trout, Schizothorax richardsonii (Gray, 1832). Aquaculture Research, 52(1):130-141.
Dawood, M. A. O. (2021). Nutritional immunity of fish intestines: Important insights for sustainable aquaculture. Reviews in Aquaculture, 13(1):642-663.
Dhas, S. A., Selvaraj, T., Citarasu, T., Punitha, S. M. J., & Babu, M. M. (2015). Effect of supplemented diet with maturation plant extract on reproductive performance of Etroplus suratansis. Aquaculture Reports, 2(1):58-62.
Do, J., Choi, S., Choi, J., & Hyun, J. S. (2013). Effects and mechanism of action of a Tribulus terrestris extract on penile erection. Korean Journal of Urology, 54(3):183-188.
Dziewulska, K., Rzemieniecki, A., & Domagała, J. (2008). Basic physico-chemical parameters of milt from sea trout (Salmo trutta m. trutta), brook trout (Salvelinus fontinalis) and rainbow trout (Oncorhynchus mykiss). Journal of Applied Ichthyology, 24(4):497-502.
Ebeneezar, S., Vijayagopal, P., Srivastava, P. P., Gupta, S., Varghese, T., Prabu, D. L., Chandrasekar, S., Varghese, E., Tejpal, C. S., Anikuttan, K. K., Sayooj, P., & Wilson, L. (2020). Optimum dietary methionine requirement of juvenile silver pompano, Trachinotus blochii (Lacepede, 1801). Animal Feed Science and Technology, 268(10):1-13.
El-Greisy, Z. A., & El-Gamal, A. E. (2012). Monosex production of tilapia, Oreochromis niloticus using different doses of 17α-methyltestosterone with respect to the degree of sex stability after one year of treatment. Egyptian Journal of Aquatic Research, 38(1):59-66.
El-Kady, M. A., Hussein, M. S., Abd-Elghany, M. F., & Mabrouk, M. M. (2022). Effect of adding Tribulus terrestris extract to the diets of nile tilapia Oreochromis niloticus larvae on sex ratio and growth performance. Al-Azhar Journal of Agricultural Research, 47(1):123-132.
Falahatkar, B., Nargesi, E. A., Efatpanah, I., & Żarski, D. (2022). The effectiveness of human chorionic gonadotropin in stimulation of second spermiation in pikeperch Sander lucioperca during the spawning season. Animal Reproduction Science, 245(10):1-10.
FAO. (2022). The state of world fisheries and aquaculture. towards blue transformation. Rome: Food and Agriculture Organization of the United Nations.
Gamblin, A. P., & Morgan‐Smith, R. K. (2020). The characteristics of seminal fluid and the forensic tests available to identify it. Wiley Interdisciplinary Reviews: Forensic Science, 2(3):1-13.
Handrianto, R., Razai, T. S., & Putra, W. K. A. (2017). The effect of human chorionic gonadotropin HCG and pregnant mare serum gonadotropin (PMSG) on gonad maturation of star pomfret fish Trachinotus blochii. Jurnal Intek Akuakultur, 1(2):16-22.
Hartami, P., Hartami, P., Mahdaliana, M., & Ayuzar, E. (2022). Production of Clarias gariepinus seeds through accelerated female broodstock rematuration. Depik, 11(1):34-41.
Hassona, N. N., Zayed, M. M., Eltras, W. F., & Mohamed, R. A. (2020). Dietary supplementation of Tribulus terrestris extract improves growth and reproductive performances of the male Nile tilapia (Oreochromis niloticus). Aquaculture Research, 51(10):4245-4254.
Homrum, E., Óskarsson, G. J., Ono, K., Hølleland, S., & Slotte, A. (2022). Changes towards stable good somatic condition and increased gonad investment of Norwegian spring-spawning herring (Clupea harengus) after 2005 are linked to extended feeding period. Frontiers in Marine Science, 9(1):1-19.
Honji, R. M., Araújo, B. C., Caneppele, D., Nostro, F. L. Lo, & Moreira, R. G. (2022). Dynamics of ovarian maturation during the annual reproductive cycle of the endangered fish Steindachneridion parahybae (Siluriformes: Pimelodidae) in captivity. Journal of Fish Biology, 101(1):55-68.
Knowles, J., Boryshpolets, S., Kholodnyy, V., Rahi, D., Vysloužil, J., Muselík, J., Stejskal, V., Kouřil, J., & Podhorec, P. (2022). Effects of gonadotropin-releasing hormone agonist administered in microparticles on sperm quality and quantity, and plasma sex steroid levels in northern pike. Animal, 16(1):1-8.
Li, W., Xiong, Y., Wang, Z., Zhang, Q., Shen, X., Liu, Q., Yan, H., Gao, R., Liu, Y., Pang, H., & Wang, X. (2023a). Effects of different photoperiod conditions on survival, growth, and gonadal development of Takifugu rubripes adults. Aquaculture, 564(4):1-16.
Li, Y., Yang, H., Li, Z., Li, S., & Li, J. (2023b). Advances in the biosynthesis and molecular evolution of steroidal saponins in plants. International Journal of Molecular Sciences, 24(3):1-19.
Mansour, A. T., Alsaqufi, A. S., Omar, E. A., El-Beltagi, H. S., Srour, T. M., & Yousef, M. I. (2022). Ginseng, tribulus extracts and pollen grains supplementation improves sexual state, testes redox status, and testicular histology in Nile tilapia males. Antioxidants, 11(5):875-880.
Maulianawati, D., Awaludin, A., & Rachmawati, M. (2021). Development of catfish and tilapia cultivation through the application of feed modification technology with katuk leaf extract, artificial spawning, and sexreversal in Karang Harapan Village, Tarakan City, North Kalimantan. Indonesian Collaboration Journal of Community Services (ICJCS), 1(4):254-261.
Merino, O., Risopatrón, J., Valdebenito, I., Figueroa, E., & Farías, J. G. (2023). Effect of the temperature of activation medium on fish sperm quality: Impact on fertilization in vitro in aquaculture practice. Reviews in Aquaculture, 15(2):434-451.
Putra, W. K. A, & Razai, T. S. (2017). Effect of pure and combine hormone of pregnant mare serum (PMSG) on gonadosmatic index, hepatosomatic index of silver pompano fish (Trachinotus blochii). Journal of Aquaculture Science, 2(1):61-71.
Putra, W. K. A., & Raza’i, T. S. (2020). Hormonal induction maturation of silver pompano Trachinotus blochii. Jurnal Akuakultur Indonesia, 19(1):61-73.
Saha, N., Koner, D., & Sharma, R. (2022). Environmental hypoxia: A threat to the gonadal development and reproduction in bony fishes. Aquaculture and Fisheries, 7(5):572-582.
Saiyed, A., Jahan, N., Makbul, S. A. A., Ansari, M., Bano, H., & Habib, S. H. (2016). Effect of combination of Withania somnifera Dunal and Tribulus terrestris Linn on letrozole induced polycystic ovarian syndrome in rats. Integrative Medicine Research, 5(4):293-300.
Santos, H. O., Howell, S., & Teixeira, F. J. (2019). Beyond tribulus (Tribulus terrestris L.): The effects of phytotherapics on testosterone, sperm and prostate parameters. Journal of Ethnopharmacology, 235(1):392-405.
Sarida, M., Lusiani, L., Putri, A. Y., Elisdiana, Y., & Adiputra, Y. T. (2025). Early gonadal differentiation, sex ratio, and growth performance of nile tilapia (Oreochromis niloticus) with Tribulus terrestris extract supplementation. Journal of Aquaculture and Fish Health, 14(1):103-113.
Shahid, M., Riaz, M., Talpur, M. M. A., & Pirzada, T. (2016). Phytopharmacology of Tribulus terrestris. Journal of Biological Regulators and Homeostatic Agents, 30(3):785-788.
Sultana, T., Mazumder, S. K., Kubra, J., Nishad, N., Khalil, S. M. I., Das, S. K., Khan, M. A. R., & Hasan, M. T. (2023). A multidisciplinary method to assess the reproductive biology of Mystus bleekeri. Aquaculture and Fisheries, 8(3):280-287.
Sun, J. L., Song, F. B., Wang, L., Zhang, W. W., Chen, Y. M., Zhou, L., Gui, J. F., & Luo, J. (2022). Sexual size dimorphism in golden pompano (Trachinotus blochii): Potential roles of changes in energy allocation and differences in muscle metabolism. Frontiers in Marine Science, 9(1):1-18.
Swaroop, A., Maheshwari, A., Verma, N., Tiwari, K., Kumar, P., Bagchi, M., Preuss, H. G., & Bagchi, D. (2017). A novel protodioscin-enriched fenugreek seed extract (Trigonella foenum-graecum, family Fabaceae) improves free testosterone level and sperm profile in healthy volunteers. Functional Foods in Health and Disease, 7(4):235-245.
Tang, U., Amin, B., Sukendi, S, & Pamukas, N. A. (2020). Osmotic performance rate, stress response and growth performance of silver pompano (Trachinotus blochii) reared in different salinities using recirculating culture. AACL Bioflux, 13(3):1546-1556.
Walker, W. H. (2021). Androgen actions in the testis and the regulation of spermatogenesis. Advances in Experimental Medicine and Biology, 1288(1):175-203.
Zhu, W., Du, Y., Meng, H., Dong, Y., & Li, L. (2017). A review of traditional pharmacological uses, phytochemistry, and pharmacological activities of Tribulus terrestris. Chemistry Central Journal, 11(1):1-16.