Synodontis schall, Wahrindi : fisheries, gamefish

Synodontis schall (Bloch & Schneider, 1801)

Wahrindi
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Synodontis schall
Photo von Geremew, A.

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

> Siluriformes (Catfishes) > Mochokidae (Squeakers or upside-down catfishes) > Mochokinae
Etymology: Synodontis: Greek, syn, symphysis = grown together + Greek, odous = teeth (Ref. 45335).
More on authors: Bloch & Schneider.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

; süßwasser benthopelagisch; pH range: 6.0 - 8.0; dH range: ? - 30; potamodrom (Ref. 138143). Tropical; 22°C - 28°C (Ref. 2060)

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Africa: found practically in all basins of West Africa, except for the coastal basins of Guinea, Sierra Leone and Liberia (Ref. 57223), but including Senegal, Gambia, Volta, Niger and Chad basins (Ref. 3202), and Cross River in Nigeria (Ref. 81251). Also Nile basin downstream of Murchison Falls, including Lake Albert (Ref. 28714, 78218); Lake Turkana (Ref. 52331, 78218); and Ethiopian lakes Abaya and Chew Bahir [= Stephanie] (Ref. 78218). Also reported from Uebi Guiba (Uebi Shebeli) (Ref. 3202). Reports from Athi and Tana rivers are misidentifications probably refering to Synodontis zanzibaricus (Ref. 52331).

Länge bei der ersten Reifung / Größe / Gewicht / Alter

Geschlechtsreife: Lm 19.7, range 12 - 17 cm
Max length : 40.0 cm TL Männchen/unbestimmt; (Ref. 126422); max. veröff. Gewicht: 584.00 g (Ref. 126422); max. veröff. Alter: 12 Jahre (Ref. 72479)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 1; Rückenflossenweichstrahlen (insgesamt) : 6 - 7; Afterflossenstacheln: 0. Diagnosis: gill slits not extending ventrally beyond pectoral-fin insertions (Ref. 28714, 57223). Body long, its depth 20-29% of SL (Ref. 28714). Post-orbital length at least 60% of snout length (Ref. 57223, 81251). Eye contained 1.75-2.25 times in interorbital width (Ref. 4903). Maxillary barbels longer than head (Ref. 57223, 81251) but not reaching to pelvic fins (Ref. 57223), unbranched and without tubercles (Ref. 57223, 81251) or distinct basal membrane (Ref. 28714, 57223, 81251). Outer mandibular barbels with few, rather short and simple ramifications (Ref. 57223, 81251). Branches of inner mandibular barbels few, short, simple and tuberculate (Ref. 57223, 81251), at least the anterior ones (Ref. 57223). Mandibular teeth moderately developed (Ref. 57223), movable (Ref. 81251), numbering 24-39 (Ref. 57223, 81251). Entire margin of opercle smooth (Ref. 81251). Dorsal- and pectoral-fin spines straight (Ref. 57223). Pectoral spines strongly serrated with twice the number of serrations along anterior edge than posterior edge (Ref. 81251), denticulations weaker on outer than on inner margin (Ref. 4903, 57223). Dorsal spine prolonged by a short filament (Ref. 81251), smooth anteriorly (Ref. 57223, 81251) except for a few apical denticles (Ref. 57223), and few serrations along posterior edge (Ref. 81251). However, large individuals may also have a weak denticulation on lower half of spine (Ref. 57223). Humeral process pointed and granulose, slightly keeled ventrally (Ref. 57223, 81251), its depth contained 1.8-2 times in its length (Ref. 4903), its posterior tip not or just reaching a point beneath the dorsal fin spine (Ref. 28714). Adipose fin well developed (Ref. 57223, 81251), high, rather close to rayed dorsal fin (Ref. 57223), not rayed (Ref. 28714). Body uniformly coloured or spotted body brownish dorsally, whitish ventrally (juveniles with white markings and black spots); caudal fin without single dark patch at base of each fin lobe (Ref. 81251). Maxillary barbels white or beige; outer margins of caudal-fin lobes more or less dark (Ref. 57223).
Body shape (shape guide): fusiform / normal.

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Adults are omnivores feeding on insect larvae (Ref. 13868) (especially chironomids (Ref. 28714), nymphs, eggs and detritus (Ref. 13868). Also on molluscs Ref. 4903), fish, bivalves in the Sudd and snails in Gezira irrigation canals (Ref. 28714). Oviparous (Ref. 205). Breeding occurs during the flood season (Ref. 28714). Utilized for human consumption. Maximum TL was recorded at 47.0 cm (Ref. 57223).

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

Oviparous (Ref. 205). Distinct pairing during breeding (Ref. 205).

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Paugy, D. and T.R. Roberts, 2003. Mochokidae. p. 195-268 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. 57223)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))

  nicht bedroht (LC) ; Date assessed: 02 June 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: kommerziell; Sportfisch: ja
FAO - Publication: search | FishSource |

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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex
(Ref. 82804) 		PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.01445 (0.01184 - 0.01765), b=2.91 (2.86 - 2.96), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trophische Ebene
(Ref. 69278) 		2.9   ±0.37 se; based on food items.
Widerstandsfähigkeit
(Ref. 120179) 		mittel, Verdopplung der Population dauert 1,4 - 4,4 Jahre. (K=0.10-0.54; tmax=3; Fec=64,273).
Anfälligkeit der Fischerei
(Ref. 59153) 		Low vulnerability (20 of 100). 🛈
Preiskategorie
(Ref. 80766) 		Unknown.
Nährstoffe
(Ref. 124155) 		Calcium = 115 [56, 220] mg/100g; Iron = 1.53 [0.87, 2.66] mg/100g; Protein = 16.5 [15.3, 17.7] %; Omega3 = 0.519 [0.186, 1.468] g/100g; Selenium = 122 [48, 309] μg/100g; VitaminA = 28.5 [10.1, 77.5] μg/100g; Zinc = 1.85 [1.22, 2.69] mg/100g (wet weight);