, 78:157 | Cite as

Induced sex reversal in Tilapia nilotica (Cichlidae) with methyl testosterone

  • Mark Owusu-Frimpong
  • Baldev Nijjhar


Gonadally undifferentiated Tilapia nilotica fry were fed with methyl testosterone at the dosage of 50 mg/kg of dry diet. The fry used in the investigation belonged to two age groups with a mean total length of 10 mm and 13.5 mm. Treatment lasted for a minimum of four weeks and a maximum of six weeks. 100% males were obtained in all the various groups under androgen treatment.


Induced sex reversal methyl testosterone Tilapia nilotica Cichlidae 


  1. Bardach, J. E., Ryther, J. H. & McLarney, W. O. 1972. Aquaculture: The Farming and Husbandary of Freshwater and Marine Organisms. Wiley-Interscience, New York. 350–384.Google Scholar
  2. Clemens, H. P. & Inslee, T. 1968. The production of unisexual broods by Tilapia mossambica sex reversed with methyl testosterone. Trans. Am. Fish. Soc., 97 (1): 18–21.CrossRefGoogle Scholar
  3. Da Silva, A. B., Sobrinho, A. C., Fernandes, J. A. & Lovshin, L. L. 1973. Observation préliminaires sur l'obtention d'hydrides tous males des espèces Tilapia hornorum et Tilapia nilotica. Notes et Documents sur la Pêche et la Pisciculture no7.Google Scholar
  4. Eckstein, B & Spira, M. 1965. Effects of sex hormones on gonadal differentiation in cichlid Tilapia aurea. Biol. Bull., 129: 483–489.CrossRefGoogle Scholar
  5. FAO, 1974. Lake Kossou Fishery Development Project. Ivory Coast. FAO Aquacult. Bull., 6 (2–3): 28.Google Scholar
  6. FAO, 1975a. Culture of Tilapia. FAO Aquacult. Bull., 7 (1–2): 7–8.Google Scholar
  7. FAO, 1975b. Sex-reversal of Tilapia. FAO Aquacult. Bull., 7 (3–4): 7.Google Scholar
  8. FAO, 1976. Sex reversal of Tilapia. FAO Aquacult. Bull., 8 (1): 5–6.Google Scholar
  9. FAO, 1977. Aquaculture development. FAO Aquacult. Bull., 8 (3–4): 9.Google Scholar
  10. Guerrero, R. D. Use of male hormones for the production of all-male Tilapia broods (personal communication).Google Scholar
  11. Guerrero, R. D. 1975a. Culture of monosex male Tilapia mossambica and Ophicephalus striatus in fertilized ponds with supplementary feeding. Philipp. J. Fish. 12 (1–2): 64–74.Google Scholar
  12. Guerrero, R. D., 1975b. Use of androgens for the production of all-male Tilapia aurea (Steindachner). Trans. Am. Fish. Soc. 104 (2): 342–348.CrossRefGoogle Scholar
  13. Guerrero, R. D. & Abella, T. A. 1976. Induced sex reversal of Tilapia nilotica with methyl testosterone. Fish. Res. J. Philipp. 1 (2): 46–49.Google Scholar
  14. Hickling, C. F. 1960. The Malacca tilapia hybrids. J. Genetics. 57 (1): 1–10.CrossRefGoogle Scholar
  15. Hickling, C. F. 1968. The farming of fish. Pergamon Press, New York. 88 p.Google Scholar
  16. Holden, M. & Reed, W. 1972. West African Fresh Water Fishes. Longman Group Ltd., London 51 p.Google Scholar
  17. Huet, M., 1970. Textbook of Fish culture: Breeding and Cultivation of fish. Fishing News (Books) Ltd., London.Google Scholar
  18. Institute of Aquatic Biology (I.A.B.) Report. 1973. Achimota, Ghana.Google Scholar
  19. Maar, A., Mortimer, M. A. E. & Van der Lingen, I. 1966. Fish Culture in Central East Africa. FAO Rome. 16o p.Google Scholar
  20. Mires, D. 1977. Theoretical and practical aspects of the production of all-male Tilapia hybrids. Bamidgeh 29: 94–101.Google Scholar
  21. Morissens, P. 1977. La production de tilapia hybride monosexe male en Israel. La Pisciculture francaise no 50. 13° annee 2° trimestre.Google Scholar
  22. Pagan, F. A. 1969. Cage culture of Tilapia. FAO Aquacult. Bull., 2 (1): 6.Google Scholar
  23. Pruginin, J. 1967. Report to the Government of Uganda on the experimental fish culture project in Uganda, 1965–1966. UNDP/FAO REPORT NO. TA 2446.Google Scholar
  24. Shell, E. W. 1968. Monosex culture of male Tilapia nilotica Linnaeus, in ponds stocked at three rates. Proc. FAO World Symposium on Warm-water Pond Fish Culture, May - 18–25, 1966, Rome, Italy. FAO Fish Rep. 44 (4): 353–356.Google Scholar
  25. Swingle, H. S. 1960. Comparative evaluation of two tilapias as pond fishes in Alabama. Trans. Am. Fish. Soc. 89 (2): 142–148.CrossRefGoogle Scholar
  26. Trewavas, E. & Irvine, F. R. 1947. Freshwater fishes. In the fishes and fisheries of the Gold Coast: 212–282. Irvine F. R. et al. (Eds) London: Crown Agents for the colonies.Google Scholar
  27. Van Someren, V. D. & Whitehead, P. J. 1960. The culture of Tilapia nigra (Gunther) in ponds. The early growth of males and females at comparable stocking rates, and the length/weight relationship. East Africa. Argric. J. 25 (3): 169–173.CrossRefGoogle Scholar
  28. Whyte, S. A. 1975. Distribution, trophic relationships and breeding habits of the fish population in a tropical lake basin (Lake Bosumtwe-Ghana). J. Zool., London 177, 25–56.CrossRefGoogle Scholar

Copyright information

© Dr. W. Junk b.v. Publishers 1981

Authors and Affiliations

  • Mark Owusu-Frimpong
    • 1
  • Baldev Nijjhar
    • 2
  1. 1.Building and Road Research InstituteGhanaSouth Africa
  2. 2.Department of Biological SciencesUniversity of Science and TechnologyGhanaSouth Africa

Personalised recommendations