Genetic diversity, population genetic structure and demographic history of the Ribbontail stingray Taeniura lymma (Fabricius, 1775) (elasmobranchii: myliobatiformes: dasyatidae) along the Tanzanian coastline
| dc.contributor.author | Nehemia, Alex | |
| dc.date.accessioned | 2025-07-11T15:05:05Z | |
| dc.date.available | 2025-07-11T15:05:05Z | |
| dc.date.issued | 2024 | |
| dc.description | Journal Article | |
| dc.description.abstract | The Ribbontail stingray Taeniura lymma is an economically important fish and attractive species for the aquarium trade industry. Overfishing, habitat degradation, and pollution, however, pose a threat to this species. This study used partial mitochondrial cytochrome oxidase subunit I (COI) sequences (603 base pairs long) from 96 samples of T. lymma collected at five fish-landing sites (Deep Sea-Tanga, Malindi-Unguja, Kaole-Bagamoyo, Kivukoni-Dar es Salaam, and Bandarini-Mtwara) located along the coast of Tanzania to determine the species’ genetic diversity, population genetic structure, and demographic history. The findings revealed an average nucleotide diversity of 0.24 ± 0.16% and a haplotype diversity of 0.75 ± 0.04. Nucleotide and haplotype diversities were relatively low at Kaole-Bagamoyo compared to the other studied localities. An Analysis of Molecular Variance (AMOVA) indicated limited but statistically significant genetic differences among populations (Overall FST = 0.09, p < 0.01). Pairwise AMOVA revealed genetic difference between the Deep Sea-Tanga population and all other populations studied with exception of Malindi-Unguja. Analyses of mismatch distribution, demographic history, and a haplotype network support a scenario of historical population expansion in the studied species. Immediate effort is required to protect population exhibiting low genetic diversity in this commercially important ray. | |
| dc.identifier.citation | Alex Nehemia (18 Nov 2024): Genetic diversity, population genetic structure and demographic history of the Ribbontail stingray Taeniura lymma (Fabricius, 1775) (elasmobranchii: myliobatiformes: dasyatidae) along the Tanzanian coastline, Mitochondrial DNA Part A, DOI: 10.1080/24701394.2024.2427841 | |
| dc.identifier.uri | https://doi.org/10.1080/24701394.2024.2427841 | |
| dc.identifier.uri | https://www.suaire.sua.ac.tz/handle/123456789/6798 | |
| dc.language.iso | en | |
| dc.publisher | Taylor & Francis | |
| dc.subject | lasmobranch | |
| dc.subject | stingray | |
| dc.subject | haplotype network | |
| dc.subject | effective population size | |
| dc.subject | demographic history | |
| dc.title | Genetic diversity, population genetic structure and demographic history of the Ribbontail stingray Taeniura lymma (Fabricius, 1775) (elasmobranchii: myliobatiformes: dasyatidae) along the Tanzanian coastline | |
| dc.type | Article |