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Description |
Asia: Mekong basin (Ref. 12693). Reported from Chao Phraya and Maeklong basins (Ref. 26336).
Geographic Range [top]
Range Description: This species occurs in the Mekong basin. It is recorded in Cambodia north of Kratie, in Thailand (including, as its synonym, Osteochilus tatumi Fowler, 1937, from the Chao Phraya River in Thailand at least as far north as Chiang Mai), Lao PDR, Viet Nam (in Srepok) and Yunnan province, China.
Countries occurrence:
Native:
Cambodia; China (Yunnan); Lao Peoples Democratic Republic; Thailand; Viet Nam
Additional data:
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: This is an abundant species throughout its range. However a population decline of approximately 30-50% is inferred due to heavy fishing pressure. It is expected to continue decline in the future at this rate or higher, as proposed dam constructions within its range will have a significant and immediate impact on migrations (Baird and Flaherty 2004; Baird 2009a, 2009b).
Current Population Trend: Decreasing
Additional data:
? Population severely fragmented: No
Habitat and Ecology [top]
Habitat and Ecology: This species is found in large rivers and streams. In the Mekong basin, the juveniles migrate out of the Sesan, Srepok and Srepok (the 3S) rivers into the mainstream Mekong, turn downstream to the border of Kratie and Stung Treng Province, and then turn upstream to southern Laos PDR and northeastern Thailand for feeding purposes. They graze on algae on rocks (Baird and Flaherty 2004). The species spawns in the middle of the Sekong River in July and August. The maximum size recorded is 60 cm (Sokheng 1999).
Systems: Freshwater
Generation Length (years): 10
Movement patterns: Full Migrant
Use and Trade [top]
Use and Trade: This species is commercially fished for human consumption. It also very occasionally occurs in the international aquarium trade (M. Kottelat pers. comm. 2011).
Threats [top]
Major Threat(s): The species is targeted during the spawning season with gillnets. Heavy gillnetting during the feeding migrations is also a threat. Dams proposed on the Mekong and 3S rivers could have a major negative effect on the species during its migration (Baird 2009a, 2009b).
Conservation Actions [top]
Conservation Actions: In Attapeu and Sekong Provinces, southern Laos, attempts have been made to ban fishing during the spawning season. Village level protected areas throughout its range have benefited the species in the dry season. More research is needed for this species, and it would benefit from increased conservation planning throughout its range. The need is urgent to gain further information on the ecology of the species, in particular to understand the impact of proposed mainstream dams on the long distance migration of the species within the Mekong.
Citation: Rainboth, W. 2011. Bangana behri. The IUCN Red List of Threatened Species 2011: e.T180773A7651418. http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T180773A7651418.en. Downloaded on 08 January 2019.
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