Table of Contents
Overview
Comprehensive Description
Biology
Lives in the edge of the lake with plenty of waterweeds. Carnivore. Stays at bottom of water by day and comes out to the surface seeking food by dawn and dusk (Ref. 45563).
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Kobayakawa, M. 1989 Systematic revision of the catfish genus Silurus, with description of a new species from Thailand and Burma. Jap. J. Ichthyol. 36(2):155-186. (Ref. 9417)
http://www.fishbase.org/references/FBRefSummary.php?id=9417&speccode=6566
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Distribution
Asia: endemic to Dian Chi Lake, Yunnan, China.
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IUCN, International Union for Conservation of Nature and Natural Resources 1994 1994 IUCN red list of threatened animals. International Union for Conservation of Nature and Natural Resources, Gland, Switzerland and Cambridge, U.K. (Ref. 6376)
http://www.fishbase.org/references/FBRefSummary.php?id=6376&speccode=9781
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Range Description
Endemic to Lake Dianchi, Yunnan Province, China. The species is not yet known from elsewhere but it maybe exists in some reservoirs, such as Songhuaba.
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Lakes of Dianchi and Yilong, Yunnan Province, China.
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Physical Description
Morphology
Dorsal soft rays (total): 4 - 6; Analsoft rays: 61 - 73
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Wang, S. (ed.) 1998 China red data book of endangered animals. Pisces. National Environmental Protection Agency. Endangered Species Scientific Commision. Science Press, Beijing, China. 247p. (Ref. 45563)
http://www.fishbase.org/references/FBRefSummary.php?id=45563&speccode=8737
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Diagnostic Description
Head depressed; eyes small and located in anterior section of head; snout short; lower jaw longer than upper one and its end extending nearly to anterior edge of eyes; barbels 2 pairs, body naked. Body dark gray on back and sides, with cloudy streaks and milky white on belly.
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Wang, S. (ed.) 1998 China red data book of endangered animals. Pisces. National Environmental Protection Agency. Endangered Species Scientific Commision. Science Press, Beijing, China. 247p. (Ref. 45563)
http://www.fishbase.org/references/FBRefSummary.php?id=45563&speccode=8737
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Ecology
Habitat
Habitat and Ecology
Habitat and Ecology
Systems
Lives in the littoral zone of the lake with plenty of waterweeds and is carnivorous. It stays at bottom of water by day and comes out to the surface of water seeking food by dawn and dusk.
Systems
- Freshwater
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Trophic Strategy
Lives in the edge of the lake with plenty of waterweeds. Carnivore. Stays at bottom of water by day and comes out to the surface seeking food by dawn and dusk.
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Wang, S. (ed.) 1998 China red data book of endangered animals. Pisces. National Environmental Protection Agency. Endangered Species Scientific Commision. Science Press, Beijing, China. 247p. (Ref. 45563)
http://www.fishbase.org/references/FBRefSummary.php?id=45563&speccode=8737
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Conservation
Conservation Status
IUCN Red List Assessment
Red List Category
CR
Critically Endangered
Red List Criteria
B1ab(ii,iii);D
Version
3.1
Year Assessed
2008
Assessor/s
Chen, X.-Y. & Yang, B.
Reviewer/s
Kullander, F. (Freshwater Fish Red List Authority) & Smith, K. (IUCN Freshwater Biodiversity Assessment Unit)
Contributor/s
Justification
Silurus mento is endemic to Lake Dianchi (surface area 292.6 km²), Yunnan Province, China. The species occurs only in the littoral zone of the lake so its extent of occurrence is estimated at about 20% of the lake area: 63.5 km². It was common before 1950s, started to become rare in late 1950s, and has not been found in the lake since the 1970s. This is most likely due to habitat loss and introduced species. It is most likely extinct from the lake, but further surveys are needed to confirm this and the possibility that a population may be present in connected reservoirs such as Songhuaba.
History
- 1996Endangered(Baillie and Groombridge 1996)
- 1994Insufficiently Known(Groombridge 1994)
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Trends
Population
Population
Population Trend
Only ever known from Lake Dianchi itself, there hass no record of this species since 1970s. The population size is probably very small.
Population Trend
Unknown
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Threats
Critically Endangered (CR) (B1ab(ii,iii); D)
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IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
http://www.fishbase.org/references/FBRefSummary.php?id=57073
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Major Threats
Its loss from the lake is likely due to habitat loss and introduced fish species. This fish is relying on littoral zone with macrophytes, its disappearance from the lake is obviously related to loss of macrophytes, which result in these big fishes exposed in the shallow water and increased mortality from its natural enemy and human beings, and being short of food etc. Predation of eggs and juveniles by introduced species may also play an important role.
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Management
Wikipedia
Kunming catfish
The Kunming catfish, Silurus mento, is a species of fish in the Siluridae family. It is endemic to China where it occurs in Dian Chi Lake. This species grows to a length of 21.5 centimetres (8.5 in) TL.
Source
- ^ Chen, X.-Y. & Yang, B. (2008). "Silurus mento". IUCN Red List of Threatened Species. Version 2011.1. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/20227. Retrieved 9 August 2011.
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