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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Tjong, Djong
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Agriculture, Biological Sciences & Forestry Environmental Science

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Haplotype diversity of Nemacheilus pfeifferae on the two sides of the Bukit Barisan Mountain Range, West Sumatra: Haplotype diversity of Nemacheilus pfeifferae Aidil, Dyta Rabbani; Roesma, Dewi Imelda; Tjong, Djong
Journal of Tropical Life Science Vol. 15 No. 1 (2025)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/

Abstract

Nemacheilus pfeifferae is one of the native species from Sumatra Island. The previous morphological study on Nemacheilus pfeifferae from several locations on the two sides of the Bukit Barisan Mountain Range, West Sumatra, showed a significant differentiation. The Bukit Barisan Mountain Range is considered to contribute to that differentiation. This hypothesis was tested by identifying the haplotype diversity of N. pfeifferae from the two sides of the Bukit Barisan Mountain Range using the cytochrome b gene from mitochondrial DNA. The samples were collected from seven geographical populations consisting of four rivers flowing west and three rivers flowing east of the Bukit Barisan Mountain range. The tissue samples were DNA extracted, DNA amplified, DNA sequenced, and analyzed using molecular software. Overall, the result showed that N. pfeifferae from West Sumatra has a sequence divergence of 0.6%-5.5%. No haplotypes were shared between populations of N. pfeifferae from West Sumatra. N. pfeifferae in West Sumatra has high haplotype diversity and moderate nucleotide diversity. The sequence divergences of N. pfeifferae within the western populations are higher than in the eastern populations. Nemacheilus pfeifferae from the western part of Bukit Barisan has high sequence divergences (2.9%-4.8%) with the eastern part of Bukit Barisan. The phylogenetic tree shows the separation of N. pfeifferae populations on the two sides of the Bukit Barisan Mountain Range. Nemacheilus in Asia forms a polyphyletic group supported by a high bootstrap value. The Bukit Barisan Mountain Range has played a significant role in the presence of genetic variation
Unraveling Genetic Relationship and Morphological Divergence of Rasbora tornieri (Ahl, 1922) across Sumatra Island: Genetic and Morphological Study of Rasbora tornieri Prawira, Furqan; Syaifullah; Tjong, Djong; Aadrean; Maideliza, Tesri; Roesma, Dewi
Journal of Tropical Life Science Vol. 15 No. 1 (2025)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/

Abstract

Previous research indicates that the genetic diversity of Rasbora tornieri (Ahl, 1922) from the Musi River population in South Sumatra is notably low compared to populations from Borneo. Historical river connections between Sumatra and Borneo likely influence this low genetic diversity. However, the distribution of Rasbora tornieri across multiple geographic locations in Sumatra may contribute to significant genetic and morphological variations within this species. This study aims to elucidate the phylogenetic relationships and morphological variation of Rasbora tornieri across its known distribution in Sumatra. A comprehensive approach integrating molecular and morphological analyses was employed. Mitochondrial genes, Cytochrome c Oxidase subunit 1 (COI, 655 bp) and Cytochrome B (Cyt B, 629 bp), were sequenced, and morphological assessments were conducted. Phylogenetic and genetic diversity analyses revealed high genetic differentiation among populations. Morphological variations were statistically supported by the Mann-Whitney test, Principal Component Analysis (PCA), and Unweighted Pair Group Method with Arithmetic Mean (UPGMA) clustering, further highlighting population divergence. These findings indicate that geographic isolation and environmental factors influence the genetic and morphological diversity of Rasbora tornieri. Understanding these variations is crucial for conservation efforts, particularly amid habitat degradation and overfishing. This study provides valuable insights into freshwater fish biodiversity in Southeast Asia
Co-Authors Aadrean Aidil, Dyta Rabbani Dewi Imelda Roesma Prawira, Furqan Roesma, Dewi Syaifullah Tesri Maideliza