Cyprinus yilongensis

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	ACTINOPTERYGII	CYPRINIFORMES	CYPRINIDAE

Scientific Name:	Cyprinus yilongensis
Species Authority:	Yang <i>et al.</i>, 1977
Taxonomic Notes:

Assessment Information [top]

Red List Category & Criteria:	Extinct     ver 3.1
Year Assessed:	2011
Assessor/s:	Zhou, W.
Reviewer/s:	Allen, D., Zhao, H., Cui, K. & Chen, X.-Y.
Justification: Considered to have gone extinct as Yilong Lake dried up as a result of water abstraction for agriculture in the 1981. The species was surveyed for in 1983 and 1984, but was not found, and recent surveys by the Kunming Institute of Technology have also not found the species (W.  Zhou pers. comm, 2011). No live specimens exist in captivity.
History:	1996 – Extinct 1994 – Extinct? (Groombridge 1994)

Geographic Range [top]

Range Description:	The species is only known from Yilong Lake, Yunnan, southern China. The species was first described in 1977, from specimens collected in 1963-4.
Countries:	Regionally extinct: China (Yunnan)

Population [top]

Population:

The species is thought to be extinct. The lake was surveyed in 1983-84 (W. Zhou pers. comm. 2011), and the species was not recorded. Recent surveys by the Kunming Institute of Technology have also not found the species (W.  Zhou pers. comm, 2011). No live specimens exist in captivity.

Habitat and Ecology [top]

Habitat and Ecology:	Previously recorded from a lake.
Systems:	Freshwater

Threats [top]

Major Threat(s):

Overfishing depleted populations of the species. The water level of the lake declined since the 1950s. In 1981 the lake completely dried up (for about 20 days) as a result of water abstraction for agriculture. The lake is also polluted by increased organic pollution caused by sedimentation from the surrounding catchment. Urbanisation and pollution from agriculture are also threats.

Conservation Actions [top]

Conservation Actions:

No conservation actions are in place.

Bibliography [top]

Hilton-Taylor, C. 2000. 2000 IUCN Red List of Threatened Species. IUCN, Gland, Switzerland and Cambridge, UK. IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.2). Available at: http://www.iucnredlist.org. (Accessed: 10 November 2011). Jiang, C-L. and Xu, L-H. 1996. Diversity of aquatic actinomycetes in Lakes of the Middle Plateau, Yunnan, China. Applied and Environmental Microbiology 62(1): 249-253.