Revisiting the diversity of barbonymus (Cypriniformes, cyprinidae) in sundaland using dna-based species delimitation methods

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Abstract

Biodiversity hotspots often suffer from a lack of taxonomic knowledge, particularly those in tropical regions. However, accurate taxonomic knowledge is needed to support sustainable management of biodiversity, especially when it is harvested for human sustenance. Sundaland, the biodiversity hotspot encompassing the islands of Java, Sumatra, Borneo, and Peninsular Malaysia, is one of those. With more than 900 species, its freshwater ichthyofauna includes a large number of medium-to large-size species, which are targeted by inland fisheries. Stock assessment requires accurate taxonomy; however, several species groups targeted by inland fisheries are still poorly known. One of those cases is the cyprinid genus Barbonymus. For this study, we assembled a consolidated DNA barcode reference library for Barbonymus spp. of Sundaland, consisting of mined sequences from BOLD, as well as newly generated sequences for hitherto under-sampled islands such as Borneo. A total of 173 sequences were analyzed using several DNA-based species delimitation methods. We unambiguously detected a total of 6 Molecular Operational Taxonomic Units (MOTUs) and were able to resolve several conflicting assignments to the species level. Furthermore, we clarified the identity of MOTUs occurring in Java.

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Dahruddin, H., Sholihah, A., Sukmono, T., Sauri, S., Nurhaman, U., Wowor, D., … Hubert, N. (2021). Revisiting the diversity of barbonymus (Cypriniformes, cyprinidae) in sundaland using dna-based species delimitation methods. Diversity, 13(7). https://doi.org/10.3390/d13070283

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