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ARS Home » Southeast Area » Stuttgart, Arkansas » Harry K. Dupree Stuttgart National Aquaculture Research Cntr » Research » Publications at this Location » Publication #151663
Title: GMT VS. MIXED-SEX NILE TILAPIA PRODUCTION IN A GREENHOUSE RECIRCULATING SYSTEM

Author
item PERSHBACHER, PETER - UAPB
item Pfeiffer, Timothy
item WHITE, JEFFERY - UAPB
item JALALUDDIN, MOHAMMED - UAPB

Submitted to: Book of Abstracts World Aquaculture Society
Publication Type: Proceedings
Publication Acceptance Date: 12/1/2002
Publication Date: 1/27/2002
Citation: PERSHBACHER, P., PFEIFFER, T.J., WHITE, J., JALALUDDIN, M. GMT VS. MIXED-SEX NILE TILAPIA PRODUCTION IN A GREENHOUSE RECIRCULATING SYSTEM. BOOK OF ABSTRACTS WORLD AQUACULTURE SOCIETY. 2002. p.20.

Interpretive Summary:

Technical Abstract: Nile tilapia is a popular food and cultured fish with U.S. imports many times higher than domestic production. A promising strain of Nile tilapia is the genetically male tilapia (GMT), which reduces over-production and enhances growth characteristics due to the preponderance of males. Growth of GMT and mixed-sex strains of Nile tilapia in a recirculating aquaculture system with six 1-m diameter tanks was evaluated. The six tanks were stocked with one-hundred 38-g fish, three tanks with GMT and three tanks with mixed-sex Nile tilapia. All fish were fed a floating 32% protein pelleted feed at four different daily feed rates: 2, 2.5, 3, and 4% of body weight. Fish were harvested after 103 days with survival averaging above 96% for all tanks. GMT fish grew faster under all rations except for the 2.5% BW and averaged a growth increase of 11% over all four rations. GMT also has superior food conversion ration (FCR), with the highest FCR at a feed rate of 4% BW. The resulting combination of increased growth and food conversion is certainly an advantage to producing all male populations for small-scale indoor systems.