Genetic diversity of Nile tilapia (Oreochromis niloticus) populations in Ethiopia: insights from nuclear DNA microsatellites and implications for conservation
Abstract Background Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) is among the economically most important freshwater fish species in East Africa, and a major source of protein for local consumption. Human induced translocations of non-native stocks for aquaculture and fisheries have been fou...
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| Format: | Article |
| Language: | English |
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BMC
2021-06-01
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| Series: | BMC Ecology and Evolution |
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| Online Access: | https://doi.org/10.1186/s12862-021-01829-2 |
| _version_ | 1818358166788767744 |
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| author | Genanaw Tesfaye Manuel Curto Paul Meulenbroek Gernot K. Englmaier Papius Dias Tibihika Esayas Alemayehu Abebe Getahun Harald Meimberg |
| author_facet | Genanaw Tesfaye Manuel Curto Paul Meulenbroek Gernot K. Englmaier Papius Dias Tibihika Esayas Alemayehu Abebe Getahun Harald Meimberg |
| author_sort | Genanaw Tesfaye |
| collection | DOAJ |
| description | Abstract Background Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) is among the economically most important freshwater fish species in East Africa, and a major source of protein for local consumption. Human induced translocations of non-native stocks for aquaculture and fisheries have been found as a potential threat to the genetic diversity and integrity of local populations. In the present study, we investigate the genetic structure of O. niloticus from 16 waterbodies across Ethiopia using 37 microsatellite loci with SSR-GBAS techniques. Results The samples are structured into three main clusters shaped either by biogeographic factors or stocking activities. High F ST values (Global F ST = 0.438) between populations indicate a high level of genetic differentiation and may suggest long term isolation even within the same drainage systems. Natural populations of the Omo-Turkana system and the lakes in the Southern Main Ethiopian Rift showed the highest genetic variability while low variability was found in stocked populations of lakes Hora, Hashenge and Hayq. Conclusions The results presented herein, may provide an essential basis for the management and conservation of the unique genetic resources in northern East Africa, and advance our understanding of biodiversity, phylogeny, evolution and development towards phylogenetically more accurate taxonomic classifications. |
| first_indexed | 2024-12-13T20:24:41Z |
| format | Article |
| id | doaj.art-f48c6b6f9ace44b4bd75556824b2a666 |
| institution | Directory Open Access Journal |
| issn | 2730-7182 |
| language | English |
| last_indexed | 2024-12-13T20:24:41Z |
| publishDate | 2021-06-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Ecology and Evolution |
| spelling | doaj.art-f48c6b6f9ace44b4bd75556824b2a6662022-12-21T23:32:35ZengBMCBMC Ecology and Evolution2730-71822021-06-0121111410.1186/s12862-021-01829-2Genetic diversity of Nile tilapia (Oreochromis niloticus) populations in Ethiopia: insights from nuclear DNA microsatellites and implications for conservationGenanaw Tesfaye0Manuel Curto1Paul Meulenbroek2Gernot K. Englmaier3Papius Dias Tibihika4Esayas Alemayehu5Abebe Getahun6Harald Meimberg7EIAR - National Fisheries and Other Aquatic Life Research CenterInstitute for Integrative Nature Conservation Research, University of Natural Resources and Life Sciences, ViennaInstitute of Hydrobiology and Aquatic Ecosystem Management (IHG), University of Natural Resources and Life Sciences, ViennaUniversity of Graz, Institute of BiologyNational Environment Management AuthorityEIAR - National Fisheries and Other Aquatic Life Research CenterDepartment of Zoological Sciences, Addis Ababa UniversityInstitute for Integrative Nature Conservation Research, University of Natural Resources and Life Sciences, ViennaAbstract Background Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) is among the economically most important freshwater fish species in East Africa, and a major source of protein for local consumption. Human induced translocations of non-native stocks for aquaculture and fisheries have been found as a potential threat to the genetic diversity and integrity of local populations. In the present study, we investigate the genetic structure of O. niloticus from 16 waterbodies across Ethiopia using 37 microsatellite loci with SSR-GBAS techniques. Results The samples are structured into three main clusters shaped either by biogeographic factors or stocking activities. High F ST values (Global F ST = 0.438) between populations indicate a high level of genetic differentiation and may suggest long term isolation even within the same drainage systems. Natural populations of the Omo-Turkana system and the lakes in the Southern Main Ethiopian Rift showed the highest genetic variability while low variability was found in stocked populations of lakes Hora, Hashenge and Hayq. Conclusions The results presented herein, may provide an essential basis for the management and conservation of the unique genetic resources in northern East Africa, and advance our understanding of biodiversity, phylogeny, evolution and development towards phylogenetically more accurate taxonomic classifications.https://doi.org/10.1186/s12862-021-01829-2Ethiopian Rift ValleyCichlidGenotypingAdmixtureFreshwater biodiversityStocking |
| spellingShingle | Genanaw Tesfaye Manuel Curto Paul Meulenbroek Gernot K. Englmaier Papius Dias Tibihika Esayas Alemayehu Abebe Getahun Harald Meimberg Genetic diversity of Nile tilapia (Oreochromis niloticus) populations in Ethiopia: insights from nuclear DNA microsatellites and implications for conservation BMC Ecology and Evolution Ethiopian Rift Valley Cichlid Genotyping Admixture Freshwater biodiversity Stocking |
| title | Genetic diversity of Nile tilapia (Oreochromis niloticus) populations in Ethiopia: insights from nuclear DNA microsatellites and implications for conservation |
| title_full | Genetic diversity of Nile tilapia (Oreochromis niloticus) populations in Ethiopia: insights from nuclear DNA microsatellites and implications for conservation |
| title_fullStr | Genetic diversity of Nile tilapia (Oreochromis niloticus) populations in Ethiopia: insights from nuclear DNA microsatellites and implications for conservation |
| title_full_unstemmed | Genetic diversity of Nile tilapia (Oreochromis niloticus) populations in Ethiopia: insights from nuclear DNA microsatellites and implications for conservation |
| title_short | Genetic diversity of Nile tilapia (Oreochromis niloticus) populations in Ethiopia: insights from nuclear DNA microsatellites and implications for conservation |
| title_sort | genetic diversity of nile tilapia oreochromis niloticus populations in ethiopia insights from nuclear dna microsatellites and implications for conservation |
| topic | Ethiopian Rift Valley Cichlid Genotyping Admixture Freshwater biodiversity Stocking |
| url | https://doi.org/10.1186/s12862-021-01829-2 |
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