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Some journal articles may be available online from: Ingenta or Science Direct


R6938 Improvement and regional evaluation of the YY male technology

Peer Reviewed


Abalos, J. L., Mair, G.C., Abucay, J.S and Abella, T.A. (1998).  Comparative study on sperm counts of XY and YY males in Nile Tilapia Oreochromis niloticus L. (abstract only). In: The Fifth Asian Fisheries Forum: Fisheries and Food Security Beyond the Year 2000. Asian Fisheries Society, Aquatic Resources Research Institute, Chulalongkorn University, Bangkok, Thailand. pp 1.

Abucay, J.A., Mair, G.C., Skibinski, D.O.F. and Beardmore, J.A. (1999). Environmental sex determination: the effect of temperature and salinity on sex ratio in Oreochromis niloticus L. Aquaculture 172, 219-234

Abucay, J.S. and Mair, G.C. (1997). Hormonal sex reversal of tilapia: Implications of hormone treatment application in closed water systems. Aquaculture Research 28, 841-845.

Abucay, J.S., Mair, G.C., Skibinski, D.O.F. and Beardmore, J.A. (1997). The occurrence of incidental sex reversal in Oreochromis niloticus. L. pp 729-738. In: Fitzsimmons, K. (Ed.) Tilapia Aquaculture, Proc. of the Fourth International Symposium on Tilapia in Aquaculture, Orlando, Florida, U.S.A. Northeast Regional Agricultural Engineering Service, New York. Vol. 2.

Ariel, A.M., Mair, G.C., Abucay, J.S. and Sevilleja, R.C. (1998). Evaluation of hapa design and broodstock replacement for improved breeding efficiency in Nile tilapia. (abstract only). p 249 In: The Fifth Asian Fisheries Forum: Fisheries and Food Security Beyond the Year 2000. Asian Fisheries Society, Aquatic Resources Research Institute, Chulalongkorn University, Bangkok, Thailand.

Bartolome, Z.B., Mair, G.C., Abucay, J.S. and Sevilleja, R.C. (1998). Evaluation of techniques for improved fry nursing efficiency in Nile tilapia Oreochromis niloticus L. (abstract only). p 248. In: The Fifth Asian Fisheries Forum: Fisheries and Food Security Beyond the Year 2000. Asian Fisheries Society, Aquatic Resources Research Institute, Chulalongkorn University, Bangkok, Thailand.

Capili, J.B., Mair, G.C., Asuncion, A.A. and Pascual, L.P. (1997). Evaluation of individual tagging and marking techniques in Nile tilapia (Oreochromis niloticus L.) (Abstract only). p 713. In: Fitzsimmons, K. (Ed.) Tilapia Aquaculture, Proc. of the Fourth International Symposium on Tilapia in Aquaculture, Orlando, Florida, U.S.A. Northeast Regional Agricultural Engineering Service, New York. Vol. 2.

Dunham, R., Majumdar, K., Hallerman, E., Hulata, G., Gjedrem, T., Mair, G., Bartley, D., Gupta, M. and Liu, Z. (2000). Aquaculture genetics in the third millennium. pp 139-144. In: International conference on aquaculture in the third millennium - Book of Synopses. NACA and FAO, Bangkok, Thailand.

Garcia-Abiado, M.A.R., Paras, H.J.S. and Mair, G.C. (1996). Correlation of oocyte diameter with some morphometric characters in the Nile tilapia, Oreochromis niloticus L. p 83-88. In: C.L. Marte, G.F. Quinitio and A.C. Emata (Eds.), Proceedings of the Seminar-Workshop on Breeding and Seed Production of Cultured Finfishes in the Philippines, May 4-5, 1993, Tigbauan, Iloilo, Philippines. SEAFDEC/AQD, Tigbauan, Iloilo, Philippines

Hai, N.H., Thien, T.M. and Tuan, P.A., (1998). Sex ratio variation and the feasibility of YY-male production in the Vietnamese strain of Oreochromis niloticus (L.). Paper presented at the National Workshop on Aquaculture, September 29-30,1998, Hanoi, Vietnam. (in Vietnamese).

Mair, G.C. and Van Dam, A.A. (1996). The effect of sex ratio at stocking on recruitment in Nile tilapia (Oreochromis niloticus L.) ponds. In: R.S.V. Pullin, J. Lazard, M. Legendre, J.B. Amon Kothias and D. Pauly (Eds.), The Third International. Symposium on Tilapia in Aquaculture, Abidjan, ICLARM Conf. Proc. 41: 100-107.

Mair, G.C., Abucay, J.S., Skibinski, D.O.F., Abella, T.A. and Beardmore, J.A. (1997). Genetic manipulation of sex ratio for the large scale production of all-male tilapia Oreochromis niloticus L. Canadian Journal of Fisheries and Aquatic Sciences 54(2), 396-404.

Mair, G.C., Capili, J.B., Skibinski, D.O.F., Beardmore, J.A., Pascual, L.P., Abucay, J.S., Danting, J.C. and Reyes, R.A. (1997). Sex ratios and growth performance of crossbred genetically male tilapia using YY males in Oreochromis niloticus L. pp 262-271. In: Fitzsimmons, K. (Ed.) Tilapia Aquaculture, Proc. of the Fourth International Symposium on Tilapia in Aquaculture, Orlando, Florida, U.S.A. Northeast Regional Agricultural Engineering Service, New York. Vol. 1.

Mair, G.C., Dahilig, L.R., Morales, E.J., Beardmore, J.A. and Skibinski, D.O.F. (1997). Application of genetic techniques for the production of monosex male tilapia in aquaculture: Early experiences from the Philippines. pp 225-227. In: Proceedings of the Fourth Central American Symposium on Aquaculture, Tegucigalpa, Honduras, April 22-24, 1997

Mair, G.C., Estabillo, C.C. and Dahilig, L.R. (1996). Artificial incubation for intensive fry production of Nile tilapia, Oreochromis niloticus (L.). pp 163-165. In: C.L. Marte, G.F. Quinitio and A.C. Emata (Eds.), Proceedings of the Seminar-Workshop on Breeding and Seed Production of Cultured Finfishes in the Philippines, May 4-5, 1993, Tigbauan, Iloilo, Philippines. SEAFDEC/AQD, Tigbauan, Iloilo, Philippines.

Tuan, P.A., Little, D.C. and Mair, G.C. (1998). Genotypic effects on comparative growth performance of all-male tilapia Oreochromis niloticus (L.). Aquaculture 159, 293-302.

Tuan, P.A., Mair, G.C. and Little, D.C. (1998). The effect of seasonal temperature variance on the sex ratio of genetically male tilapia (GMT) produced by YY males in the Egypt-AIT strain of Oreochromis niloticus L. (abstract only). p 249. In: The Fifth Asian Fisheries Forum: Fisheries and Food Security Beyond the Year 2000. Asian Fisheries Society, Aquatic Resources Research Institute, Chulalongkorn University, Bangkok, Thailand.

Tuan, P.A., Mair, G.C., Little, D.C. and Beardmore, J.A. (1999). Sex determination and the feasibility of genetically male tilapia production in the Thai-Chitralada strain of Oreochromis niloticus (L.). Aquaculture 172, 257-269

Other Outputs

Van Bang, N. (1999). Optimization of Feminization Techniques in Nile Tilapia (Oreochromis niloticus) and Implications for Studies on Sex Determination. M.Sc. Thesis, Asian Institute of Technology. 82p.

Abucay, J.S. (1997). Genetic and environmental factors affecting growth and sex ratio in the Nile tilapia Oreochromis niloticus L. Ph.D. thesis, University of Wales. 326p.

Badua, E.L. (1999). Agar-bound and loose feed comparison in feminization of genotypically YY Oreochromis niloticus (L.) fry by oral administration of Diethylstilbestrol. BS Thesis, Central Luzon State University, Philippines. 40p.

Ha, T.T and Tuan, P.A. (2000). Controlled ambient temperature and sex ratios in genetically male tilapia of the Egypt-Swansea strain of O. niloticus. RIA #1 Annual Report - 1999.

Mair, G.C. (1998). DFID Fish Genetics Programme at AIT. AASP Newsletter 3(2), 5-7.

Mair, G.C. (1999).  Genetic improvement of tilapias: application in aquaculture and future prospects. pp 86-107. In: The Fifth Roche Aquaculture Conference, Bangkok, August 26, 1999. Rovithai, Bangkok, Thailand

Mair, G.C. (2000). Genetics of Broodstock Management: Basic principles and practices. AARM Newsletter Vol. 4 (4), 4-6.

Mair, G.C. and Abella, T.A. (Eds.) (1997) Technoguide on the production of genetically male tilapia. Freshwater Aquaculture Centre, Central Luzon State University, N. Ecija, Philippines. 68p

Mair, G.C. and Beardmore, J.A. (2000). Aquaculture genetics in development. AARM Newsletter Vol. 4 (4), 2-4.

Tan, N.T. and Tuan, P.A. (2000). Investigation into several isoenzymes in O. aureus and the Thai, Vietnamese strains of O. niloticus RIA #1 Annual Report - 1999.

Thang, L.T. and Tuan, P.A. (1998). Sex reversal of tilapia Oreochromis niloticus (L.) by 17-methyltestosterone immersion. Paper presented at the National Workshop on Aquaculture, September 29-30,1998, Hanoi, Vietnam. (in Vietnamese).

Tuan, P.A. (1998). Assessment of sex ratio in hormonally treated tilapia population. Fisheries Science and Technology 6, 7-8. (in Vietnamese).

Tuan, P.A. (1998). YY-male technology: The recent achievements and application in Vietnam. Paper presented at the National Workshop on Aquaculture, September 29-30,1998, Hanoi, Vietnam. (in Vietnamese).

Tuan, P.A., Thien, T.M., Ninh, N.H. and Tri, T.T. (2000). Investigation into production of all-male tilapia in the Thai strain of O. niloticus and Blue tilapia O. aureus. RIA #1 Annual Report - 1999.

Tuan, P.A. (1998). Production of monosex male tilapia: Status and Prospects. Fisheries 1, 13-15. (in Vietnamese).

Tuyet, B.T., Tuan, P.A. and Tri, T.T., (1998). Preliminary investigation into the feasibility of all-male tilapia production by interspecific crosses and YY-male. Paper presented at the National Workshop on Aquaculture, September 29-30, 1998, Hanoi, Vietnam (in Vietnamese).


R6937 Socio-economic analysis of the dissemination and impact of genetically male tiliapia (GMT)

Final Technical Report [view pdf file: 4.2MB]


R6428 Development of Monosex Culture in Puntius Species.

Peer Reviewed


Pongthana, N., Penman, D. J., Baoprasertkul, P., Hussain, M. G., Islam, M. S., Powell, S. F. and McAndrew, B. J. (1999). Monosex female production in the silver barb (Puntius gonionotus Bleeker). Aquaculture 173, 247-256

Other Outputs

Azad, A. K. (in preparation). Sexual dimorphism of the silver barb (Puntius gonionotus Bleeker) in aquaculture. MSc thesis, Bangladeshi Agricultural University, Mymensingh, Bangladesh.

Powell, S.F. (2000) Genetic manipulations and sex determination in the rosy barb (Puntius conchonius) M.Sc. Thesis, University of Stirling, Scotland.

Lecture. Development of monosex female culture in the silver barb (Puntius gonionotus Bleeker). Research Institute for Aquaculture No. 1, Vietnam. 13th September 1996.

Training Course on monosex female silver barbs and monosex male tilapia. 25 DOF biologists. NAGRI, October 1996.

Training Course on monosex female silver barbs and monosex male tilapia. 44 farmers. NAGRI, December 1996.

Lecture. Monosex female culture in Puntius gonionotus. Bangladesh Fisheries Research Institute, Mymensingh, Bangladesh. 8th May 1997.

Oral presentation. Monosex female production in the silver barb (Puntius gonionotus Bleeker). Sixth International Symposium on Genetics in Aquaculture, 23-28th June 1997, Stirling, Scotland.

End of project workshop, 30-31 March 1998, NAGRI, Thailand. Twenty one participants and observers from project institutes (NAGRI, BFRI, IOA), government aquaculture research institutes in Vietnam, other institutes in Thailand and other DFID Fish Genetics Research Programme projects.

Training course on monsex female silver barbs. 30 DOF biologists. NAGRI, 30th April 1998. To be followed by distribution of neomales on request.

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