|Scientific Name:||Schistura quasimodo|
|Species Authority:||Kottelat, 2000|
|Red List Category & Criteria:||Endangered B1ab(i,ii,iii)+2ab(i,ii,iii) ver 3.1|
|Reviewer(s):||Gibson, C. & Allen, D.|
The species is currently known from the Nam San stream in the Nam Ngum basin, Lao PDR, where it is only known from upstream of the Nam Ngum 1 dam (completed in 1971). The Nam San is one of a several streams that now enter into the Nam Ngum 1 reservoir. The distribution, if different, prior to the construction of the dam of the species in the river is not known, and it is not known if the species is present in other tributaries within the Nam Ngum drainage. A number of further dams are now in operation (e.g., the Nam Ngum 2), nearing completion, or are proposed within the Nam Ngum drainage, however impacts from these dams on the species are uncertain without better knowledge of the species' distribution. For example, the species is known from the Nam San, whilst the Nam Ngum 2 dam that is nearing completion is on the Nam Ngum.
This species is known from the lower and upper Nam San catchment, a tributary of the Nam Ngum, northern Lao PDR (Kottelat 2000). The Extent of Occurrence is estimated at less than 898 km2 and the Area of Occupancy at 98 km2, both based on the extent of the Nam San above the Nam Ngum 1 reservoir.
Native:Lao People's Democratic Republic
|Estimated area of occupancy (AOO) - km2:||98|
|Continuing decline in area of occupancy (AOO):||Yes|
|Estimated extent of occurrence (EOO) - km2:||898|
|Continuing decline in extent of occurrence (EOO):||Yes|
|Range Map:||Click here to open the map viewer and explore range.|
This species is known from a single sampling effort in 1997 and has not been observed again as no further research has been carried out (Kottelat 2000). Populations are inferred to be declining as a result of mining activities reported within the watershed in 2012 (M. Kottelat pers. comm. 2012).
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||
Observed in streams with moderate to fast water, in riffles, over gravel to stone substrate.
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Use and Trade:||
This species is utilised as part of local subsistence fisheries (M. Kottelat pers. comm. 2011).
The surrounding habitat has been deforested and agriculture occurs in the area. Associated impacts such as soil erosion, sedimentation and agricultural pollution are expected to impact the aquatic environment (M. Kottelat pers. comm. 2011). Additional survey in the area in 2012 found extensive small-scale gold mining excavations in the area that impact several kilometres of stream downstream, there is also a large-scale Australian-owned company (Phu Bia Mining Ltd.) operating there, and it is possible that iron ore extraction may occur in the future.
The impact of dams within the Nam Ngum drainage on the species is uncertain as current and proposed dams are below the Nam Ngum 1 reservoir or are on other rivers.
Research is needed into the species' distribution and ecology, and the impacts of threats including dams.
|Citation:||Kottelat, M. 2012. Schistura quasimodo. The IUCN Red List of Threatened Species 2012: e.T180931A1679325. http://dx.doi.org/10.2305/IUCN.UK.2012-1.RLTS.T180931A1679325.en . Downloaded on 04 October 2015.|
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