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Cyclocheilichthys apogon (Valenciennes, 1842)

Beardless barb
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Cyclocheilichthys apogon
Picture by Roberts, T.R.


Thailand country information

Common names: Pla ngam lung, Pla nham lung, Pla sai tan
Occurrence: native
Salinity: freshwater
Abundance: abundant (always seen in some numbers) | Ref:
Importance: commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Occurs in the Maeklong, Chao Phraya, Mekong, Peninsular and Southeast Thailand river systems (Ref. 26336); also from Bangkok, Petchaburi, Kanchanaburi, Kalasin, Khon Kaen, Surat Thani, Chanthaburi, Nakhon Si Thammarat, Ubon Ratchathani, Prachuap Khiri Khan, Phitsanulok, Phrae, Narathiwat and Surat Thani (Ref. 37773). Widely distributed and an important element in the food supply of the people living along the large rivers (Ref. 4832). Also Ref. 9648, 26580, 36654, 43281, 57235.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/th.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Vidthayanon, C., J. Karnasuta and J. Nabhitabhata, 1997
National Database:

Common names from other countries

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Cypriniformes (Carps) > Cyprinidae (Minnows or carps) > Cyprininae
Etymology: Cyclocheilichthys: Greek, kyklos = round + Greek, cheilos = lip + Greek, ichtys = fish (Ref. 45335).
  More on author: Valenciennes.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic.   Tropical; 24°C - 26°C (Ref. 1672); 30°N - 10°S

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Asia: Myanmar to Indonesia.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 28.7 cm TL male/unsexed; (Ref. 108878); max. published weight: 340.60 g (Ref. 108878)

Short description Morphology | Morphometrics

No barbels; black blotch at caudal base; rows of black spots along scale rows (Ref. 43281).

Biology     Glossary (e.g. epibenthic)

Inhabits small streams, reservoirs, lakes (Ref. 4832), canals, ditches, and generally areas with slow moving or standing water (Ref. 12693). Occurs in medium to large-sized rivers (Ref. 12975, 57235). Stomach contents are composed of fish and insect remains (Ref. 56749). Typically found around surfaces, such as plant, leaves, branches and tree roots where it browses for small plankton and crustaceans. Moves into flooded forests and non-forested floodplains. Reported to breed late during high-water season from September to October as water levels peak and begin to decline (Ref. 12693). Found in the basin-wide tributary of the lower Mekong (Ref. 36667). Common foodfish in markets (Ref. 57235).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Rainboth, W.J., 1996. Fishes of the Cambodian Mekong. FAO species identification field guide for fishery purposes. FAO, Rome, 265 p. (Ref. 12693)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 13 January 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial; aquarium: commercial
FAO(Fisheries: production; publication : search) | FishSource |

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Internet sources

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes(genus, species) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5020   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00661 - 0.01659), b=3.04 (2.91 - 3.17), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278):  2.9   ±0.3 se; based on diet studies.
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (K=0.3).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (33 of 100).
Price category (Ref. 80766):   Unknown.