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All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL ILMIAH PLATAX ILMU KELAUTAN: Indonesian Journal of Marine Sciences Journal of Indonesian Tourism and Development Studies JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Juvenil: Jurnal Ilmiah Kelautan dan Perikanan AGRI-SOSIOEKONOMI
Rene Charles Kepel, Rene Charles
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Social Sciences

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First DNA Barcoding Records of Fish Species from Totok and Makalo Estuaries, North Sulawesi, Indonesia Menajang, Febry Susane Ivonne; Rondonuwu, Ari Berty; Kambey, Alex Denny; Kepel, Rene Charles
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 31, No 1 (2026): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.31.1.61-70

Abstract

The Totok and Makalo River estuaries in North Sulawesi, Indonesia, serve as vital habitats teeming with fish biodiversity, supporting coastal ecosystems and local fisheries. This study aimed to identify fish species and elucidate their genetic relationships through DNA barcoding of the Cytochrome Oxidase I (COI) gene. Fish samples were collected from both estuaries using nets and traps, followed by molecular analysis involving polymerase chain reaction (PCR) amplification and Sanger sequencing. The results confirmed the presence of 11 fish species, including Osteomugil engeli, Polydactylus plebeius, and Gazza minuta, with high identification accuracy (over 98% sequence similarity to reference databases). Notably, Paracentropogon rubripinnis and Nematalosa come were recorded for the first time in North Sulawesi waters, expanding the known distribution of these species. Significant genetic variation was detected in P. rubripinnis, potentially indicating cryptic speciation or local adaptation to environmental gradients. Phylogenetic analysis revealed close genetic affinities between certain species and populations from Taiwan and Bangladesh, suggesting historical migration patterns or shared ancestry, possibly facilitated by ocean currents. These findings underscore the rich genetic diversity in these estuaries, which are influenced by factors like salinity, temperature, and anthropogenic pressures. The study emphasizes the urgency of conservation strategies, including habitat protection and sustainable fishing practices, to preserve biodiversity and maintain ecosystem services. By providing baseline data on species composition and genetic connectivity, this research contributes to broader efforts in marine biodiversity monitoring and informs policy for coastal management in Indonesia's biodiversity hotspots. 
Co-Authors Abdul Latief Abadi Adnan Sjaltout Wantasen Adnan Wantasen Alex D. Kambey Alex Denny Kambey Anneke V. Lohoo Ari Berty Rondonuwu Deiske A. Sumilat Gaspar D. Manu, Gaspar D. Gaspar Duhar Manu Grevo S Gerung Hadath, Deandra Starsha Bianca Haryani Sambali Hengki Djemie Walangitan Hengky J Sinjal Irwan Baino Jane Sulinda Tambas Joshian Nicolas William Schaduw Joudy R.R. Sangari, Joudy R.R. Kandati, Feibe R. S. Katiandago, Theodora Maulina Kliwon Hidayat Kondoy, Khiristin Ivone Fisye Kristianto Parera, Kristianto Laurence J. L Lumingas Lawrence J. L Lumingas Lawrence J. L. Lumingas Mamonto, Riswanto Mandagi, Stephanus V. Mantiri, Desy M. H Mantiri, Rose O.S.E Menajang, Febry S. I. Menajang, Febry Susana Ivone Menajang, Febry Susane Ivonne Muhammad Aris Nasprianto, - - Nasprianto, . Ockstan Jurike Kalesaran Onibala, Hernie Preisy Meicy Meriam Watung Rangan, Jety Kornela Resya Ika Firmansyah Rey Wahyudi Simbala Ridwan Lasabuda Rini M Wowor Rose O. S. E. Mantiri, Rose O. S. E. Rose O.S.E. Mantiri Rumengan, Anton Salaki, Meiske Sofie Silvester B Pratasik Sinjal, Hengk Stephanus V. Mandagi Suria Darwisito Suzanne L. Undap Tamara, Giovanni Matthew A. J. Tamrin Tamrin Tamrin Tassi, Maltonius Taufiq Abdullah Tawaluyan, Marthen Hansen Turangan, Septiara Vivanda O.J. Modaso Wahidin, Nurhalis Winda Mercedes Mingkid