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Clarias gariepinus (Burchell, 1822)

North African catfish
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Clarias gariepinus
Picture by Larsen, J.H.

Classification / Names Tên thường gặp | Các synonym ( Các tên trùng) | Catalog of Fishes(Giống, Các loài) | ITIS | CoL | WoRMS | Cloffa

> Siluriformes (Catfishes) > Clariidae (Airbreathing catfishes)
Etymology: Clarias: Greek, chlaros = lively, in reference to the ability of the fish to live for a long time out of water;  gariepinus: Named after its type locality, the Gariep river, the Hottentot name for the Orange river, South Africa..

Environment: milieu / climate zone / depth range / distribution range Sinh thái học

; Nước ngọt Sống nổi và đáy; pH range: 6.5 - 8.0; dH range: 5 - 28; di cư trong nước ngọt (Ref. 51243); Mức độ sâu 0 - 80 m (Ref. 34291). Subtropical; 8°C - 35°C (Ref. 6465); 42°N - 28°S, 17°W - 51°E

Sự phân bố Các nước | Các khu vực của FAO | Các hệ sinh thái | Những lần xuất hiện | Point map | Những chỉ dẫn | Faunafri

Africa: almost Pan-African (Ref. 107916), absent from Maghreb, the Upper and (most of the) Lower Guinea and the Cape province and probably also Nogal province. Asia: Jordan, Israel, Lebanon, Syria and southern Turkey. Widely introduced to other parts of Africa, Europe and Asia. Several countries report adverse ecological impact after introduction.

Length at first maturity / Bộ gần gũi / Khối lượng (Trọng lượng) / Age

Maturity: Lm 30.8, range 34 - ? cm
Max length : 170 cm TL con đực/không giới tính; (Ref. 40637); common length : 90.0 cm NG con đực/không giới tính; (Ref. 34290); Khối lượng cực đại được công bố: 60.0 kg (Ref. 4537); Tuổi cực đại được báo cáo: 15 các năm (Ref. 94815)

Short description Khóa để định loại | Hình thái học | Sinh trắc học

Các tia vây lưng cứng (tổng cộng) : 0; Các vây lưng mềm (tổng cộng) : 61 - 80; Tia cứng vây hậu môn: 0; Tia mềm vây hậu môn: 45 - 65; Động vật có xương sống: 56 - 63. Diagnosis: body depth 6-8 times in standard length, head 3-3,5 times in SL (Ref. 34290) or 30-37% SL (Ref. 28714). Head somewhat between rectangular and pointed in dorsal outline; snout broadly rounded; eyes supero-lateral and relatively small (Ref. 248). Teeth on premaxilla and lower jaw small, fine and arranged in several rows; nasal barbels 1/5-1/2 times as long as head in fishes longer than 12 cm, and 1/2-4/5 of head length in smaller individuals; maxillary barbels rarely shorter than head, usually somewhat longer and reaching to a point midway between origin of dorsal fin and insertion of pelvic fins; outer mandibular barbel longer than inner pair (Ref. 34290). Postorbital bones in contact; lower part of head with 2 black, lateral bands (Ref. 81644). Contrary to other Clarias species, Clarias gariepinus has a high number of gill rakers varying from 24-110 (Ref. 248, 34290, 81644, 101841), the number increasing with size of the fish; gill rakers long, slender and closely set (Ref. 248, 34290). Distance between occipital process and base of dorsal fin is short; dorsal fin almost reaches caudal fin; anal fin origin closer to caudal fin base than to snout, nearly reaching caudal fin (Ref. 248). Pelvic fin closer to snout than to caudal fin base (Ref. 248) or about midway (Ref. 28714). Pectoral fin extends from operculum to below 1st dorsal fin rays (Ref. 248). Pectoral spine robust (Ref. 248), serrated only on its outer face (Ref. 248, 81644), the number of serrations increasing with age (Ref. 248). Lateral line appears as a small, white line from posterior end of head to middle of caudal fin base; openings to secondary sensory canals clearly marked (Ref. 248).

Sinh học     Tự điển (thí dụ epibenthic)

Facultative air-breathing (Ref. 126274); Adults occur mainly in quiet waters, (vegetated fringes of) rivers and lakes, (isolated) pools (Ref. 248, 28714), irrigation and sewage effluent canals (Ref. 28714), and prefer rather shallow and swampy areas with a soft muddy substrate and calmer water (Ref. 78218). They may also occur in fast flowing rivers and in rapids (Ref. 248, 78218). Recorded as having been or being farmed in rice fields (Ref. 119549). The two known colour types appear to correlate with water turbidity and substrate type (Ref. 81644). Widely tolerant of extreme environmental conditions (Ref. 6465). Water parameters appear to play only a very minor role (Ref. 78218). The presence of an accessory breathing organ enables this species to breath air when very active or under very dry conditions. They remain in the muddy substrates of ponds and occasionally gulp air through the mouth (Ref. 6465). Can leave the water at night using its strong pectoral fins and spines in search of land-based food or can move into the breeding areas through very shallow pathways (Ref. 6868). Omnivorous bottom feeders which occasionally feed at the surface (Ref. 248), but essentially a predator feeding on crustaceans, insects and fish (Ref. 28714). Feed at night on a wide variety of prey (Ref. 6868) like insects, plankton, invertebrates and fish but also take in young birds, rotting flesh and plants (Ref. 6465). Migrate to rivers and temporary streams to spawn (Ref. 34291), and a major floodplain migrant, spawning throughout the flood season, in the Sudd (Sudan) (Ref. 28714). Also caught with dragnets. During intra-specific aggressive interactions, this species was noted to generate electric organ discharges that were monophasic, head-positive and lasting from 5-260 ms (Ref. 10479). Known as sharptooth catfish in aquaculture, a highly recommended food fish in Africa (Ref. 52863). Marketed fresh and frozen; eaten broiled, fried and baked (Ref. 9987).

Life cycle and mating behavior Maturities | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng

Oviparous. Spawning takes place during the rainy season in flooded deltas. The fishes make a lateral migration towards the inundated plains to breed and return to the river or lake soon afterwards while the juveniles remain in the inundated area. Juveniles return to the lake or river when they are between 1.5 and 2.5 cm long (Ref. 34291). First sexual maturity occurs when females are between 40-45 cm and males between 35-40 cm. Eggs are greenish. Incubations lasts little (about 33 hours at 25°C).

Main reference Upload your references | Các tài liệu tham khảo | Người điều phối | Người cộng tác

Teugels, G.G., 1986. A systematic revision of the African species of the genus Clarias (Pisces; Clariidae). Ann. Mus. R. Afr. Centr., Sci. Zool., 247:199 p. (Ref. 248)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 20 June 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Potential pest (Ref. 4537)





Human uses

Các nghề cá: buôn bán nhỏ; Nuôi trồng thủy sản: Tính thương mại; cá để chơi: đúng
FAO - Aquaculture systems: Sản xuất; Các nghề cá: landings, species profile; Publication: search | FishSource |

Thêm thông tin

Anatomy
Gill areas
Não bộ
Otoliths
Physiology
Body compositions
Nutrients
Oxygen consumptions
Dạng bơi
Swimming speeds
Visual pigment(s)
Âm thanh của cá
Diseases / Parasites
Toxicities (LC50s)
Genetics
Di truyền
Electrophoreses
Heritabilities
Human related
Aquaculture systems
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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=0.00813 (0.00668 - 0.00989), b=2.98 (2.93 - 3.03), in cm total length, based on LWR estimates for this species (Ref. 93245).
Mức dinh dưỡng (Ref. 69278):  3.8   ±0.4 se; based on diet studies.
Generation time: 8.5 (5.5 - 12.2) years. Estimated as median ln(3)/K based on 25 growth studies.
Thích nghi nhanh (Ref. 120179):  Trung bình, thời gian nhân đôi của chủng quần tối thiểu là 1.4 - 4.4 năm (K=0.06-0.19; tm=2; Fec > 10,000).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (76 of 100).
Price category (Ref. 80766):   Unknown.
Nutrients (Ref. 124155):  Calcium = 6.69 [3.48, 35.37] mg/100g; Iron = 0.989 [0.530, 1.675] mg/100g; Protein = 17.2 [16.2, 18.3] %; Omega3 = 0.291 [0.094, 0.905] g/100g; Selenium = 81.1 [23.6, 249.3] μg/100g; VitaminA = 23.9 [6.3, 90.4] μg/100g; Zinc = 0.371 [0.257, 0.553] mg/100g (wet weight); based on nutrient studies.