Genetically-Improved Tilapia Strains in Africa: Potential Benefits and Negative Impacts

dc.contributor.authorAnsah, Yaw B.en
dc.contributor.authorFrimpong, Emmanuel A.en
dc.contributor.authorHallerman, Eric M.en
dc.contributor.departmentAgricultural and Applied Economicsen
dc.contributor.departmentFish and Wildlife Conservationen
dc.coverage.countryGhanaen
dc.date.accessioned2017-09-20T18:20:19Zen
dc.date.available2017-09-20T18:20:19Zen
dc.date.issued2014-06-10en
dc.date.updated2017-09-20T18:20:19Zen
dc.description.abstractTwo genetically improved tilapia strains (GIFT and Akosombo) have been created with <i>Oreochromis niloticus</i> (Nile tilapia), which is native to Africa. In particular, GIFT has been shown to be significantly superior to local African tilapia strains in terms of growth rate. While development economists see the potential for food security and poverty reduction in Africa from culture of these new strains of tilapia, conservationists are wary of potential ecological and genetic impacts on receiving ecosystems and native stocks of tilapia. This study reviews the history of the GIFT technology, and identifies potential environmental and genetic risks of improved and farmed strains and tilapia in general. We also estimate the potential economic gains from the introduction of genetically improved strains in Africa, using Ghana as a case country. Employing a combination of the Economic-Surplus model and Monte Carlo simulation, we found the mean net present value (NPV) of the introduction of the GIFT strain in Ghana to be approximately 1% of the country’s gross domestic product. Sensitivity analysis indicated that the difference in growth or yield between the GIFT and locally-available strains has the largest effect on mean NPV. We conclude that improvements in management practices and infrastructure could increase the yield and profitability of the local strains even if genetically-improved strains are not introduced. These improvements also will ensure the realization of the full potential of introduced strains.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationAnsah, Y.B.; Frimpong, E.A.; Hallerman, E.M. Genetically-Improved Tilapia Strains in Africa: Potential Benefits and Negative Impacts. Sustainability 2014, 6, 3697-3721.en
dc.identifier.doihttps://doi.org/10.3390/su6063697en
dc.identifier.urihttp://hdl.handle.net/10919/79206en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectsustainable aquacultureen
dc.subjectnative speciesen
dc.subjectgenetic improvementen
dc.subjectMonte Carlo simulationen
dc.subjecteconomic surplusen
dc.subjectrisk analysisen
dc.subjectGhanaen
dc.titleGenetically-Improved Tilapia Strains in Africa: Potential Benefits and Negative Impactsen
dc.title.serialSustainabilityen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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