Environment: milieu / climate zone / Tiefenbereich / distribution range
Ökologie
; süßwasser; brackwasser demersal; pH range: 7.0 - ? ; dH range: 10 - ?. Tropical; 24°C - 26°C (Ref. 2060)
Africa: Nile basin (Ref. 28714, 58460), Chad (Ref. 367, 57417), Senegal, Gambia, Geba, Volta River basins (Ref. 57417). Also found in Lake Turkana in Kenya (Ref. 52331).
Length at first maturity / Size / Gewicht / Alter
Geschlechtsreife: Lm 18.2 range ? - ? cm
Max length : 43.0 cm TL Männchen/unbestimmt; (Ref. 2829); max. veröff. Gewicht: 1.0 kg (Ref. 3799); max. veröff. Alter: 5 Jahre (Ref. 126183)
Rückenflossenstacheln (insgesamt) : 2 - 3; Rückenflossenweichstrahlen (insgesamt) : 9 - 10; Afterflossenstacheln: 2; Afterflossenweichstrahlen: 7 - 8. Diagnosis: skin scaleless, but head and body covered with small spines except on snout and caudal region; teeth form beak-like structure consisting in each jaw of two pieces fused on midline and covered by layer of enamel; nostrils consisting of two fleshy lobes placed in front of folded collar surrounding the opening; two pairs of non-perforated nasal tentacles; dorsal and anal fins short and placed far back on body; pectoral fins well developed; no pelvic fins; caudal fin rounded, its length comprised 3 times in SL; longitudinal stripes along sides of body in adults; black-rimmed red ocelli (eyespots) present in juveniles (Ref. 57417).
Body shape (shape guide): short and / or deep; Cross section: circular.
Found in large rivers (Ref. 2829), open water, weed beds and vegetated fringes; feeds on mollusks (Ref. 28714). Ventral pocket communicates gill chamber with oesophagus, allowing fish to inflate its body like a ball (Ref. 57417).
Roberts, T.R., 1986. Tetraodontidae. p. 434-436. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels; MRAC, Tervuren; and ORSTOM, Paris. Vol. 2. (Ref. 2829)
IUCN Rote Liste Status (Ref. 130435: Version 2025-1)
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Fischereien: nicht kommerziell
Tools
Zusatzinformationen
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Internet Quellen
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02630 (0.01443 - 0.04794), b=2.92 (2.76 - 3.08), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (Ref.
69278): 3.6 ±0.50 se; based on food items.
Generation time: 4.5 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Widerstandsfähigkeit (Ref.
120179): mittel, Verdopplung der Population dauert 1,4 - 4,4 Jahre. (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (38 of 100).
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Nutrients (Ref.
124155): Calcium = 111 [46, 247] mg/100g; Iron = 1.1 [0.5, 2.5] mg/100g; Protein = 17.9 [15.8, 20.2] %; Omega3 = 0.211 [0.092, 0.466] g/100g; Selenium = 61.4 [30.7, 137.9] μg/100g; VitaminA = 11.3 [3.9, 32.6] μg/100g; Zinc = 1.06 [0.73, 1.59] mg/100g (wet weight);
