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- Xin, Q., E. Zhang and W.-X. Cao 2009 Onychostoma virgulatum, a new species of cyprinid fish (Pisces: Teleostei) from southern Anhui Province, South China. Ichthyol. Explor. Freshwat. 20(3):255-266. (Ref. 82789)
Habitat and Ecology
Molecular Biology and Genetics
Statistics of barcoding coverage: Onychostoma gerlachi
Public Records: 0
Specimens with Barcodes: 2
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
It is thought that these threats exist throughout the range of O. gerlachi, however this may not be to the extent of the threats in the Mekong and Chao Phraya basins; this species has been assessed as Near Threatened, with an inferred total population decline of 20-29% over the past three generations.
There are a number of large dams and other water diversion projects in both the Chao Phraya and Mekong basins, which are an additional threat to O. gerlachi; effects of developments such as these to the freshwater ecosystem include alterations to the hydrological cycle, and changes to the levels of sedimentation and dissolved O². More dams are currently under construction and planned for the future. Water from both the Chao Phraya and Mekong Rivers is used for agricultural irrigation and to supply urbanised areas, causing further disruption to the natural hydrological cycle.
Details of the threats within the Nam Ma, Hong and Nanpangjiang basins are not known, however it is likely that these are also affected to at least some extent by pollution and man made hydrological changes; the Hong (Red) river basin in particular is known to have a relatively high population density, and therefore pollution associated with urbanisation is likely.
Relevance to Humans and Ecosystems