Morphometric and Genetic Analyses of the Sheat Catfish Genus Ompok and Kryptopterus (Siluriidae) from the Mahakam River, East Kalimantan, Indone-sia

Authors

• Jusmaldi Jusmaldi, Department of Biology, Faculty of Science, Universitas Mulawarman, Samarinda 75123, IndonesiaFollow
• Rudhy Gustiano, Research Center for Biosystematic and Evolution, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Haryono Haryono, Research Center for Biosystematic and Evolution, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Rusdianto Rusdianto, Research Center for Biosystematic and Evolution, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Gema Wahyudewantoro, Research Center for Biosystematic and Evolution, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Syahroma Husni Nasution, Research Center for Limnology, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Yulianto Yulianto, Research Center for Applied Zoology, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Muhammad Hunaina Fariduddin Aththar, Research Center for Applied Zoology, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Safar Dody, Research Center for Biota Systems, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Amran Ronny Syam, Research Center for Biota Systems, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Irin Iriana Kusmini, Research Center for Applied Zoology, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow
• Yosmaniar Yosmaniar, Research Center for Freshwater Aquaculture, National Research and Innovation Agency, Cibinong 16911, IndonesiaFollow

Abstract

Anthropogenic impacts within the watershed threaten the survival of sheat catfish. Therefore, species of the genera Ompok and Kryptopterus should be conserved and domesticated to ensure their long-term persistence. Moreover, the accurate documentation of the existence and taxonomic validity of Ompok and Kryptopterus species is crucial. Accordingly, this study aims to assess the species diversity of the genera Ompok and Kryptopterus in the Mahakam River, East Kalimantan, Indonesia. The study was conducted between June and December 2014, with an update in August 2024. Fish samples were collected from the upstream and middle reaches of the Mahakam River. A total of 655 fish were biometrically examined. Scatter plots of the principal components are used to distinguish among types and identify the primary characteristics. In addition, COI gene sequence alignment, genetic variation analysis (SNP), genetic distance, and phylogenetic tree reconstruction via the Neighbor-Joining method were performed. As reference species, GenBank contains 19 partial COI gene sequences from the genera Ompok and Kryptopterus, along with the Notopterus notopterus gene sequence as an outgroup. The COI gene sequence of Silurus glanis (Siluridae) was also used as a reference. This study demonstrated that biometrics, morphology, and genetic analysis produce mutually supportive outcomes. A strong key for practical identification will be particularly valuable for clarifying distinctions among species, as well as for their conservation and sustainable use.

Recommended Citation

Jusmaldi, Jusmaldi; Gustiano, Rudhy; Haryono, Haryono; Rusdianto, Rusdianto; Wahyudewantoro, Gema; Nasution, Syahroma Husni; Yulianto, Yulianto; Aththar, Muhammad Hunaina Fariduddin; Dody, Safar; Syam, Amran Ronny; Kusmini, Irin Iriana; and Yosmaniar, Yosmaniar (2026) "Morphometric and Genetic Analyses of the Sheat Catfish Genus Ompok and Kryptopterus (Siluriidae) from the Mahakam River, East Kalimantan, Indone-sia," Makara Journal of Science: Vol. 30: Iss. 2, Article 14.
DOI: 10.7454/mss.v30i2.3334
Available at: https://scholarhub.ui.ac.id/science/vol30/iss2/14