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Description |
Geographic Range [top]
Range Description:
This species is thought to be restricted to the Kaek River (the Maenam Kaek; Chao Phraya basin) upstream of the Sakunothayan rapids, ca. 33 km west of Phitsanulok, in lower northern Thailand. It was formerly recorded from the northern tributary Huai Chieng Nam of the Kaek River (Phitsanulok Province) (Brandt 1974, Glaubrecht and Köhler 2004). Decline in habitat quality in Huai Chieng Nam has resulted in the loss of all Brotia species from the river (F. Köhler pers. comm. 2011).
Countries occurrence:
Native:
Thailand
Additional data:
? Number of Locations: 3
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: Locally abundant when present, however the decline in water quality in the Huai Chieng Nam has resulted in the loss of all Brotia species from a tributary river (F. Köhler pers. comm. 2011).
Current Population Trend: Decreasing
Additional data:
? Population severely fragmented: No
Habitat and Ecology [top]
Habitat and Ecology:
Like other Brotia species this species occurs in fast flowing well oxygenated water in rivers, rapids and waterfalls attached to rocks. Intolerant of stagnant water. Buries into sandy substrata in quiet parts of the swift river.
Systems: Freshwater
Continuing decline in area, extent and/or quality of habitat: No
Use and Trade [top]
Use and Trade: No information available.
Threats [top]
Major Threat(s):
No known specific threats to this species, but it would be vulnerable to water pollution and sedimentation, as like other Brotia species, it requires clean fast flowing water. Populations in the Huai
Chieng Nam (Brandt 1974) have been lost as a result of habitat degradation (F. Köhler pers. comm. 2011).
Conservation Actions [top]
Conservation Actions: The species lies within a protected area, and hence a species specific management plan would ensure the consideration of the species during management of the catchment. General actions include education and awareness of the biodiversity in the natural habitat, especially the importance of fast flowing rivers and streams. Habitat and populations should be monitored.
Citation: Simonis, J. & Köhler, F. 2012. Brotia microsculpta. The IUCN Red List of Threatened Species 2012: e.T184908A1763950. http://dx.doi.org/10.2305/IUCN.UK.2012-1.RLTS.T184908A1763950.en. Downloaded on 11 February 2019.
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