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All Journal Biodiversitas Journal of Biological Diversity
DJONG HON TJONG
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Andalas. Jl. Raya Unand, Limau Manis, Padang 25163, West Sumatra, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Freshwater fish diversity from Siberut Island, a small island in the western part of Sumatra, Indonesia DEWI IMELDA ROESMA; DJONG HON TJONG; DYTA RABBANI AIDIL; FURQAN DWIKI LINTANG PRAWIRA; ANDRI SAPUTRA
Biodiversitas Journal of Biological Diversity Vol. 25 No. 2 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d250244

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Abstract. Roesma DI, Tjong DH, Aidil DR, Prawira FDL, Saputra A. 2024. Freshwater fish diversity from Siberut Island, a small island in the western part of Sumatra, Indonesia. Biodiversitas 25: 836-845. Indonesia is an archipelagic country with thousands of islands, including small islands with a variety of biodiversity, such as freshwater fish. Data and information on the fish biodiversity of small islands in the western part of Sumatra are limited, including Siberut Island. A study on freshwater fish diversity in Siberut Island was carried out using morphological and molecular methods. The study was conducted on seven rivers in the North and South Siberut Districts, Siberut Island. The study obtained 676 individuals, including 34 species, 26 genera, 16 families, and 10 orders. Oxudecidae is the family with the largest species (8), and Rasbora jacobsoni has the highest number of individuals (341). Species richness ranged from 2 to 18 species per site and was highest in the Srilanggai River. Siberut Island has low-moderate freshwater fish diversity. As many as 90 DNA barcodes of individuals from 34 species have been submitted to the Barcode of Life Data System. Freshwater fish groups do not receive enough attention from local communities and the government because of the richness of marine fish on Siberut Island. Apart from functioning as evidence of species richness, the results of this study are also useful for local communities' education.
Systematics molecular investigation of Palo fish (Betta sp.) in the Harau Valley, West Sumatra using the COI gene UMMI KURNIA PUTRI; DEWI IMELDA ROESMA; DJONG HON TJONG
Biodiversitas Journal of Biological Diversity Vol. 26 No. 2 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260217

Abstract

Abstract. Putri UK, Roesma DI, Tjong DH. 2025. Systematics molecular investigation of Palo fish (Betta sp.) in the Harau Valley, West Sumatra using the COI gene. Biodiversitas 26: 698-705. Palo fish (Betta sp.) is a local ornamental fish in the Harau Valley, Lima Puluh Kota, West Sumatra, Indonesia, which was suspected to be a new species from the Betta of the Pugnax group based on the Cytochrome b gene. Molecular investigations using more reliable genes were needed to validate the taxonomic status of Palo fish and determine the phylogenetic relationship with other Betta species. The cytochrome oxidase I (COI) gene has been recognized for identification at the species level. Liver tissue samples were taken from eight Palo fish individuals from four Rangkak Hill tributaries in Harau Valley. Eight Palo fish and 44 comparison sequences were analyzed using the Aliview, IQ Tree, and MEGA VII programs. The 641 bp COI gene sequences analysis showed that Palo fish from four tributaries in Harau Valley had 100% nucleotide base similarity (identical), which shared the same haplotype. Palo fish have a close relationship with Betta stigmosa and have the least genetic distance to Betta cf. apollon (2.6%), followed by Betta ferox (3.1%) and Betta apollon (3.7%). The genetic distance values show the differences at the subspecies level within the same species. Palo fish from Harau Valley confirmed as Betta cf. stigmosa. Comprehensive studies on Betta species need to be carried out to complete the systematics of the Betta group.
DNA barcoding of Mugilogobius mertoni and M. rambaiae from Siberut and Enggano Islands, the small outermost islands of Sumatra, Indonesia DEWI IMELDA ROESMA; DJONG HON TJONG; SYAIFULLAH SYAIFULLAH; DYTA RABBANI AIDIL
Biodiversitas Journal of Biological Diversity Vol. 26 No. 1 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260138

Abstract

Abstract. Roesma DI, Tjong DH, Syaifullah, Aidil DR. 2025. DNA barcoding of Mugilogobius mertoni and M. rambaiae from Siberut and Enggano Islands, the small outermost islands of Sumatra, Indonesia. Biodiversitas 26: 386-395. Siberut and Enggano Islands are the small and outermost islands of Sumatra, Indonesia. These two islands' unique geological history allows evolutionary processes to produce high levels of endemicity. One of the interesting fish genera from the Siberut and Enggano Islands is Mugilogobius. Based on morphological identification, it was estimated there are two Mugilogobius species in the Siberut and Enggano Islands. Molecular identification of Mugilogobius using the Cytochrome Oxidase I gene (known as DNA barcoding) needs to be done to prove it. The liver tissue was used for molecular analysis. The BLAST analysis showed that Mugilogobius from Siberut and Enggano Islands have a similarity range of 97.49%-96.06% with Mugilogobius GenBank. Based on the 558 bp sequence analyzed, Mugilogobius mertoni and Mugilogobius rambaiae from Siberut and Enggano Islands have a low sequence of divergences at 0.0%-0.4%, respectively. M. rambaiae from Siberut and Enggano Islands share the same haplotype. The ability of the species to maintain their genetics and the similarity of conditions between the two islands share their high genetic similarities. M. mertoni and M. rambaiae from Siberut and Enggano Islands have a high sequence of divergences at 3.0-4.6% with M. mertoni and M. rambaiae GenBank, respectively. The long-distance location, the presence of the ocean as a barrier, and differences in habitat conditions contribute to the high variations between Mugilogobius from two islands and other populations. Mugilogobius from Siberut and Enggano Islands has a sequence of divergence at 12.4%-17.3% compared to other Mugilogobius species, supporting their differences at the species level in the same genera. This study contributed to presenting the first molecular data of Mugiologius that can be used as a sequence reference for identification and the sequences became the genetic richness data of fish in the small and outermost islands of Sumatra, Indonesia (Siberut and Enggano Islands).
Co-Authors ANDRI SAPUTRA DEWI IMELDA ROESMA DEWI IMELDA ROESMA DYTA RABBANI AIDIL DYTA RABBANI AIDIL FURQAN DWIKI LINTANG PRAWIRA SYAIFULLAH SYAIFULLAH UMMI KURNIA PUTRI