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Silurus asotus
Picture by Kim, I.-S.
Pictures | Google image
Picture by Kim, I.-S.
China country information
Common names:
Chinese catfish, 廉仔, 廉仔
Occurrence: native
Salinity: freshwater
Abundance: common (usually seen) | Ref: Nichols, J.T., 1943
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Recorded from the Yili river (Ref. 41093) and from almost all of drainages in China (Ref. 45657) and Tungting (=Dong Ting) Lake where it is known as "nian-y" (Ref. 35840). Introduced from its native range to other regions in the country (intensive culture and extensive stocking in all kinds of inland waters) (Ref. 55380).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ch.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Hwang, H.C., P.C. Yueh and S.F. Yu, 1982
National Database:
Occurrence: native
Salinity: freshwater
Abundance: common (usually seen) | Ref: Nichols, J.T., 1943
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Recorded from the Yili river (Ref. 41093) and from almost all of drainages in China (Ref. 45657) and Tungting (=Dong Ting) Lake where it is known as "nian-y" (Ref. 35840). Introduced from its native range to other regions in the country (intensive culture and extensive stocking in all kinds of inland waters) (Ref. 55380).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ch.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Hwang, H.C., P.C. Yueh and S.F. Yu, 1982
National Database:
Common names from other countries
Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) > Siluriformes (Catfishes) > Siluridae (Sheatfishes)
Etymology: Silurus: Greek, silouros = a cat fish + Greek, odous = teeth (Ref. 45335).
More on author: Linnaeus.
Etymology: Silurus: Greek, silouros = a cat fish + Greek, odous = teeth (Ref. 45335).
More on author: Linnaeus.
Environment: milieu / climate zone / depth range / distribution range Ecology
Freshwater; demersal. Temperate; 5°C - 25°C (Ref. 13614); 53°N - 23°N, 95°E - 143°E
Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Asia: Honshu, Shikoku and Kyushu in Japan, the Korean Peninsula, Taiwan, China, and Russia.
Length at first maturity / Size / Weight / Age
Maturity: Lm 36.0, range 35 - 37 cm
Max length : 130 cm TL male/unsexed; (Ref. 56557); common length : 37.0 cm SL male/unsexed; (Ref. 35840); max. published weight: 30.0 kg (Ref. 56557)
Max length : 130 cm TL male/unsexed; (Ref. 56557); common length : 37.0 cm SL male/unsexed; (Ref. 35840); max. published weight: 30.0 kg (Ref. 56557)
Short description Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 4; Anal soft rays: 67 - 84. The side of the dorsal is dark grey; white stomach; with irregular white dots on the side. One pair of maxillary barbel, longer than the head; one pair of mandibular barbels, about 1/5-1/3 the length of the maxillary barbel (Ref. 40516).
Commercially cultured in Japan. Adults feed on all types of fish (Ref. 41072). Recorded as having been or being farmed in rice fields (Ref. 119549).
Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Pairs manifest spawning embrace widely observed in other catfish species (Ref. 37360).
Details of reproductive behaviour from Katano, et al (1988): " A male first energeticaly pursued a female with its head near to the female's belly (chasing) and then began to cling to the female's body from the side, bending its tail or head (clinging). Finally the male enfolded the female's body, with its anus near to the female's (enfolding). In some cases, 2-4 males pursued a single female and two males enfolded a female at the same time. Although no aggressive behaviour was evident between males, it was always the largest male that could almost frequently approach and enfold the female. The mating pair moved a long distance in a ditch, paddy field and/or creek, performing reproductive activities."
The scattering of eggs may reduce the incidence of death of the young.
Main reference
Upload your references | References | Coordinator | Collaborators
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)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Least Concern (LC) ; Date assessed: 17 February 2020
Threat to humans
Harmless
Human uses
Fisheries: commercial; aquaculture: commercial; gamefish: yes
FAO(Aquaculture systems: production; ; publication : search) | FishSource |
More information
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Reproduction
Maturity
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Anatomy
Gill area
Brain
Otolith
Gill area
Brain
Otolith
Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Human related
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Tools
Bio-Quiz | E-book | Field guide | Identification keys | Length-frequency wizard | Life-history tool | Point map | Classification Tree
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Special reports
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Internet sources
Alien/Invasive Species database | 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 | National databases | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record
Estimates based on models
Phylogenetic diversity index (Ref. 82804): PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00589 (0.00500 - 0.00693), b=3.01 (2.96 - 3.06), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Trophic level (Ref. 69278): 4.4 ±0.3 se; based on diet studies.
Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (tm=4-5; K=0.11).
Fishing Vulnerability (Ref. 59153): High to very high vulnerability (65 of 100).