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Schistura deansmarti

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII CYPRINIFORMES BALITORIDAE

Scientific Name: Schistura deansmarti
Species Authority: Vidthayanon & Kottelat, 2003

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2013
Date Assessed: 2011-02-25
Assessor(s): Vidthayanon, C.
Reviewer(s): Ng, H.H. & Allen, D.
Justification:
The species is only known only from subterranean streams in caves in Thung Salaeng Luang National Park, Pitsanulok Province, Thailand. Given the nature of the hydrological system and the likely limited Extent of Occurrence (less than 50 km2), the species is assessed as Vulnerable (D2). Current and potential threats are tourism development and degradation of the surrounding watershed and water quality, and combined with a very restricted Extent of Occurrence, the species could easily qualify  for a higher threatened category if further information becomes available on the scope and nature of threats. An irrigation dam has been proposed for the watershed, but this is currently suspended; the species would be greatly impacted by the dam and it should be reassessed if the dam is constructed.

Geographic Range [top]

Range Description: The species is known only from subterranean streams in Tham Phra Sai Ngam cave of Nernmaprang karst formation in Thung Salaeng Luang National Park, Pitsanulok Province, Thailand. The Extent of Occurrence, based on the extent of the karst limestone, is estimated at less than 50 km2.
Countries:
Native:
Thailand
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Limited information available; considered to occur in low numbers.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Specific to torrent subterranean streams. Inhabits cave with only stagnant water in the dry season and with reportedly only moderate flow in the rainy season. Described from c.200 m from the cave entrance. Mostly found resting on the bottom, sometimes free swimming, near crevices where they hide if chased.

Depend on cave micro-organism and organic matter, very sensitive to disturbance, water quality and hydrographic change.
Systems: Freshwater

Use and Trade [top]

Use and Trade: Very occasionally seen in the aquarium trade.

Threats [top]

Major Threat(s): Human disturbance from tourism activities may threaten the species. Agriculture and deforestation in the catchment are future major threats.

Conservation Actions [top]

Conservation Actions: Protected by Thai law. Monitoring of population and habitat trends is required, as well as research into threats.

Citation: Vidthayanon, C. 2013. Schistura deansmarti. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 23 August 2014.
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