Deeply divergent freshwater fish species within a single river system in central Sulawesi
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- Utama, Ilham V.
- Tropical Biosphere Research Center, University of the Ryukyus National Research and Innovation Agency
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- Mandagi, Ixchel F.
- Faculty of Fisheries and Marine Science, Sam Ratulangi University
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- Lawelle, Sjamsu A.
- Faculty of Fisheries and Marine Science, Halu Oleo University
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- Masengi, Kawilarang W. A.
- Faculty of Fisheries and Marine Science, Sam Ratulangi University
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- Watanabe, Keiichi
- World Medaka Aquarium, Nagoya Higashiyama Zoo and Botanical Gardens
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- Sawada, Naomi
- World Medaka Aquarium, Nagoya Higashiyama Zoo and Botanical Gardens
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- Nagano, Atsushi J.
- Faculty of Agriculture, Ryukoku University Institute for Advanced Biosciences, Keio University
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- Kusumi, Junko
- Faculty of Social and Cultural Studies, Kyushu University
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- Yamahira, Kazunori
- Tropical Biosphere Research Center, University of the Ryukyus
Description
Sulawesi is a biodiversity hotspot for ricefishes (Adrianichthyidae), with many species endemic to the central part of this island in single ancient lakes or lake systems. Frequent vicariance by lake fragmentation since the Pliocene may be largely responsible for diversification in this family. In this study, we demonstrate that not only lacustrine species but also riverine species in this area are also deeply divergent even within a single river system. A mitochondrial phylogeny revealed that a ricefish population newly discovered from Cerekang River is sister to Oryzias dopingdopingensis Mandagi, Mokodongan, Tanaka, & Yamahira, another riverine species endemic to Doping-doping River. However, the Cerekang Oryzias was genetically isolated from O. dopingdopingensis, despite that Cerekang River and Doping-doping River share a connection across estuarine waters. This separation was supported by phylogenomic trees and population genetic structure analyses based on genome-wide single nucleotide polymorphisms. Coalescent-based demographic inference demonstrated that the ancestral population of these two riverine ricefishes had experienced a substantial population decrease and subsequently diverged into two sub-populations. Because the Cerekang Oryzias was also morphologically distinguished from O. dopingdopingensis, we described it as a new species, O. landangiensis. We infer that O. landangiensis and O. dopingdopingensis are of lake-origin and are relic species which were left in these rivers after the lake disappeared, and that they have lost their dispersal ability when inhabiting the ancient lake. The lost dispersal ability possibly contributed to the formation of the biodiversity hotspot for this fish group on this island.
Journal
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- Molecular Phylogenetics and Evolution
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Molecular Phylogenetics and Evolution 173 1-11, 2022-08
Elsevier
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Details 詳細情報について
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- CRID
- 1050302845900912768
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- ISSN
- 10959513
- 10557903
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- HANDLE
- 20.500.12000/0002020988
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- PubMed
- 35577301
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- Crossref
- KAKEN
- OpenAIRE
