Lao country information

Common names: Nyawn, Pa nyawn, Pba nyawn
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: commercial | Ref: Hill, M.T. and S.A. Hill, 1994
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from the Mekong basin (Ref. 43281). Occurs in the Khone Falls in the Mekong basin (Ref. 37772) and Ban Hang Khone at Don Khone, 3 km below the fall line of the great waterfalls of the Mekong basin at Lee Pee (Ref. 9497). Collected from Hatdokkeo, Tha Bo, Sai Fong, Sithan Tay, Hatsalao and Pathoun Phon of the Mekong basin (Ref. 4792). Among the most important species in the fisheries based on migrations in January-February and May-June (Ref. 9497). A strongly migratory fish species in the Khone area that does not go to Tam Ee Daeng, may be because it migrates upstream at a time when waters are low (April-early May) than when other species migrate. It goes only as far upstream as Boong Pba Jook (across from Hang Khone) before turning back and going up the channel to Hoo Sahong (Ref. 12369). Villagers catch them in the deep pools near the mouth of Hoo Sahong between Don Khone and Don Sadam (Ref. 12369). Fishers in Xayabury Province reported that it migrates downstream in October-November (Ref. 37770). Undertakes upstream migration during the wet season in May-June through Hoo Som Yai at the Great Fault Line on the Mekong River, Champassack Province (Ref. 37771). Museum: Mekong at Ban Hang Khone, just below Khone falls, CAS 94882 (Ref. 5515). Listed in Ref. 30857 as Pangasius cf. siamensis. P. macronema is an important fishery in the villages of Hang Sadam, Don Sahong, and Houa Sadam (Ref. 44002). Also Ref. 56905.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/la.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Roberts, T.R., 1993
National Database:

Common names from other countries

Pla ai duang, Cá xác soc, 大线鲶, ... more

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

Teleostei (teleosts) > Siluriformes (Catfishes) > Pangasiidae (Shark catfishes)
Etymology: Pangasius: The Vietnamese name of a fish (Ref. 45335).
More on author: Bleeker.

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

Freshwater; benthopelagic; potamodromous (Ref. 51243). Tropical

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

Asia.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 30.0 cm SL male/unsexed; (Ref. 4792)

Short description Morphology | Morphometrics

Dorsal spines (total): 1; Dorsal soft rays (total): 7; Anal soft rays: 30 - 38. Relatively deep body; lacks mid-lateral and abdominal stripes; lacks black spot at dorsal-fin origin; teeth on roof of mouth in 4 separate patches (2 vomerine and 3 palatine patches); maxillary barbel reaches tip of pectoral fin (Ref. 12693).

Facultative air-breathing (Ref. 126274); Occurs in rivers, lakes and reservoirs (Ref. 43281). Found in rapids (Ref. 37771). Forms large schools. Moves into tributary streams and flooded forests along with many species of cyprinids and other species of visually oriented catfishes such as P. pleurotaenia when water transparency decreases. Feeds on mollusks and chironomid insects (Ref. 12975), small fish and prawns (Ref. 56749). Marketed fresh (Ref. 12693).

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

Main reference Upload your references | References | Coordinator | Collaborators

Roberts, T.R. and C. Vidthayanon, 1991. Systematic revision of the Asian catfish family Pangasiidae, with biological observations and descriptions of three new species. Proc. Acad. Nat. Sci. Philad. 143:97-144. (Ref. 7432)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 07 June 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: commercial

FAO(Publication : search) | FishSource |

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Food consumption
Ration

Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance

References
Aquaculture
Aquaculture profile
Strains
Genetics
Electrophoreses
Heritability
Diseases
Processing
Mass conversion

Collaborators
Pictures
Stamps, Coins Misc.
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

Download XML

Summary page | Point data | Common names | Photos

Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00479 (0.00297 - 0.00772), b=2.96 (2.82 - 3.10), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trophic level (Ref. 69278): 3.2 ±0.40 se; based on food items.

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (27 of 100).

Price category (Ref. 80766): Unknown.

Back to Search

Random Species

Pangasius macronema Bleeker, 1850