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Title: | Dataset to study the population genomics of introduced Nile tilapia (Oreochromis niloticus (Linnaeus, 1758)) in the Democratic Republic of the Congo: repeated introductions since colonial times with multiple sources | Data Creator - person: | GERAERTS, Mare Vangestel, Carl ARTOIS, Tom De Oliveira Fernandes, Jorge Manuel JORISSEN, Michiel Chocha Manda, Auguste Danadu Mizani, CĂ©lestin SMEETS, Karen Snoeks, Jos Sonet, Gontran Tingbao, Yang VAN STEENBERGE, Maarten Vreven, Emmanuel Lunkayilakio Wamuini, Soleil VANHOVE, Maarten Huyse, Tine |
Data Creator - organization: | Dryad | Data Curator - person: | GERAERTS, Mare | Rights Holder - person: | GERAERTS, Mare | Publisher: | Dryad | Issue Date: | 2022 | Abstract: | During colonial times, Nile tilapia Oreochromis niloticus (Linnaeus, 1758) was introduced in non-native parts of the Congo Basin (Democratic Republic of the Congo, DRC) for the first time. Currently, it is the most farmed cichlid in the DRC, and is present throughout the Congo Basin. Although Nile tilapia has been reported as an invasive species, documentation of historical introductions into this basin and its consequences are scant. Here, we study the genetic consequences of these introductions by genotyping 213 Nile tilapia from native and introduced regions, focussing on the Congo Basin. Additionally, 48 specimens from 16 other tilapia species were included to test for hybridisation. Using RAD sequencing (27 611 SNPs), we discovered genetic admixture with other tilapia species in several morphologically identified Nile tilapia from the Congo Basin, stressing their ability to interbreed and the potential threat they cause to the genetic integrity of native tilapias. Populations from the Upper Congo and those from the Middle-Lower Congo are strongly differentiated. The former show genetic similarity with Nile tilapia from the White Nile, while specimens from the Benue Basin and Lake Kariba are similar to Nile tilapia from the Middle-Lower Congo, suggesting independent introductions using different sources. We conclude that the presence of Nile tilapia in the Congo Basin results from independent introductions, reflecting the dynamic aquaculture history, and that their introduction probably leads to genetic interactions with native tilapias, which could lower their fitness. We therefore urge to avoid introductions of Nile tilapia in non-native regions and to use native tilapias in future aquaculture efforts. | Research Discipline: | Natural sciences > Biological sciences > Systems biology > Genomics (01061103) Natural sciences > Biological sciences > Animal biology > Vertebrate biology (01060112) Natural sciences > Biological sciences > Genetics > Population, ecological and evolutionary genetics (01060706) |
Keywords: | RAD Sequencing;Genetic integrity;independent introductions;FOS: Biological sciences;FOS: Biological sciences | DOI: | 10.5061/dryad.sxksn035k | Link to publication/dataset: | http://datadryad.org/stash/dataset/doi:10.5061/dryad.sxksn035k | Source: | Dryad. 10.5061/dryad.sxksn035k http://datadryad.org/stash/dataset/doi:10.5061/dryad.sxksn035k | Publications related to the dataset: | 10.1111/mec.16479 | License: | Creative Commons Zero v1.0 Universal (CC0-1.0) | Access Rights: | Open Access | Category: | DS | Type: | Dataset |
Appears in Collections: | Datasets |
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