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Siluriformes (Catfishes) >
Claroteidae (Claroteid catfishes) > Auchenoglanidinae
Etymology: Auchenoglanis: Greek, auchen = neck + Greek, glanis = a fish that can eat the bait without touching the hook; a cat fish (Ref. 45335).
More on author: Valenciennes.
Issue
The species Auchenoglanis acuticeps Pappenheim, 1914 and Auchenoglanis occidentalis tchadensis Pellegrin, 1909 are considered valid in Eschmeyer (CofF ver. Jul. 2011: Ref. 87661). We postpone this change until a more complete assessment is published.
Environment: milieu / climate zone / depth range / distribution range
นิเวศวิทยา
; น้ำจืด สัตว์น้ำหน้าดิน; pH range: 6.5 - 7.8; dH range: ? - 28; สัตว์น้ำจืดที่มีการอพยพอย่างแท้จริงภายในแหล่งน้ำจืดเท่านั้น (Ref. 51243). Tropical; 21°C - 25°C (Ref. 2060)
Africa: most rivers of West Africa (Ref. 57126, 78218), Chad basin (Ref. 3236, 57126), Congo River drainage (Ref. 3236, 78218), Lake Tanganyika (Ref. 78218), Nile system in Ethiopia and Sudan (Ref. 28714, 58460), Lake Turkana drainage, including Omo River (Ref. 3236, 52331, 58460), and Shabeelle (Ref. 3236, 58460).
Length at first maturity / ขนาด / น้ำหนัก / Age
Maturity: Lm ?, range 39 - ? cm
Max length : 70.0 cm SL เพศผู้/กระเทย; (Ref. 4967)
เงี่ยงครีบหลัง (รวม) : 2; ก้านครีบอ่อนที่หาง (รวม) : 7 - 8; เงี่ยงครีบก้น: 3 - 4; ก้านครีบอ่อนที่ก้น: 6 - 8. Diagnosis: head width usually less than 2/3 of standard length (Ref. 57126). Snout long and pointed, generally greater than half the head length in adults (Ref. 28714), length more than 0.9 times the head width in adults (less in juveniles) (Ref. 57126). Hind margin of adipose fin rounded; premaxillary dentition forming (in adults) two close-set oval plates (Ref. 57126). Maxillary barbel often blackish and only rarely reaching to anterior margin of opercula (Ref. 57126), usually not reaching beyond eye and much shorter than outer mandibular barbel (Ref. 28714, 81642). 8-12 (usually 10 or 11) gill rakers on lower limb of first gill arch; palatine membrane with multiple invaginations, 1-4 of them forming longer lobes; dorsal margin of cleithral process ending in a point (visible only in adults)(Ref. 57126).
Inhabits lakes and large rivers (Ref. 4967). Has never been observed in large quantities in forested areas (Ref. 57126). Occurs in shallow water with muddy bottom. Bottom feeder, omnivore, feeds on plankton, seeds, detritus (Ref. 13868), mollusks (Ref. 13868, 28714), mud, debris (Ref. 28714), insect larvae (Ref. 6868, 28714), worms and small Crustacea (Ref. 6868). Oviparous (Ref. 205). Nested eggs are guarded by the male parent (Ref. 47642). Furthermore, the male plays host to eggs and young of Dinotopterus cunningtoni which takes advantage of the already prepared nest and feed on the host brood (Ref. 49546). An example of interspecific brood care.
Life cycle and mating behavior
Maturities | การสืบพันธุ์ | Spawnings | Egg(s) | Fecundities | ตัวอ่อน
Eggs are brooded and guarded by the male parent (Ref. 47642).
Risch, L.M., 2003. Claroteidae. p. 60-96 In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douce et saumâtres de l'Afrique de l'Ouest, Tome 2. Coll. Faune et Flore tropicales 40. Musée Royal de l'Afrique Centrale, Tervuren, Belgique, Museum National d'Histoire Naturalle, Paris, France and Institut de Recherche pour le Développement, Paris, France. 815 p. (Ref. 57126)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01023 (0.00549 - 0.01908), b=3.02 (2.85 - 3.19), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
ระดับชั้นอาหาร (Ref.
69278): 2.9 ±0.33 se; based on food items.
Generation time: 3.7 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
ความสามารถในการกลับคืนสู่ปกติ (Ref.
120179): ขนาดกลาง, เวลาต่ำสุดที่จะทำให้ประชากรเพิ่มขึ้นเป็น 2 เท่าใช้เวลา 1.4 - 4.4 ปี (K=0.3).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (38 of 100).
Nutrients (Ref.
124155): Calcium = 95.6 [51.8, 186.1] mg/100g; Iron = 1.43 [0.86, 2.46] mg/100g; Protein = 17.2 [16.0, 18.2] %; Omega3 = 0.402 [0.159, 1.013] g/100g; Selenium = 77.5 [35.5, 168.4] μg/100g; VitaminA = 22 [8, 53] μg/100g; Zinc = 1.46 [0.98, 2.09] mg/100g (wet weight);
