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Synodontis victoriae Boulenger, 1906

Lake Victoria squeaker
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Synodontis victoriae
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Uganda country information

Common names: Nkolongo
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Known from Lake Victoria (Ref. 1568, 4903, 82238), Lake Kyoga (Ref. 4903, 34290, 78218, 82238) and the Victoria Nile (Ref. 4903, 78218).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ug.html
National Fisheries Authority: http://isp.msu.edu/AfricanStudies/Plea/firi.htm
Occurrences: Occurrences Point map
Main Ref: Poll, M., 1971
National Database:

Common names from other countries

Classificatie / Names Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | 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 author: Boulenger.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; zoet water benthopelagisch; diepte 0 - 80 m (Ref. 34291), usually 20 - ? m (Ref. 34291).   Tropical; 23°C - 27°C (Ref. 13614)

Verspreiding Landen | FAO regio's | Ecosystemen | Voorkomen | Point map | Introducties | Faunafri

Africa: Lake Victoria, Lake Kioga, Victoria Nile and Malagarasi drainage (Ref. 78218, 82238).

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturity: Lm 9.1, range 8 - 10 cm
Max length : 35.0 cm SL mannelijk / geslacht onbekend; (Ref. 34290)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 1; Dorsale zachte stralen (totaal): 6-7. 16-21 mandibular teeth. Maxillary barbels reaching posterior tip of the humeral process, or occasionally beyond. Mandibular barbels with slender branches. Greyish silver, with dark spots of variable size. Caudal fin occasionally spotted (Ref. 34290).

Biologie     Verklarende woordenlijst (bv. epibenthic)

Occurs in rivers and lakes and prefers deeper water (0-80 m) (Ref. 34291), although it also occurs in shallow water (Ref. 34290). In Lake Victoria it occurs over hard and soft substrates, but is more common over soft bottoms and in water over 13 m deep; feeds on gastropod molluscs and insects (mainly chironomid larvae), and to a minor extent on fishes and ostracoda; able to extract the flesh of snails without crushing their shells (Ref. 12526). Rarely grows to lengths greater than 35 cm SL (Ref. 34290). Oviparous (Ref. 205).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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

Hoofdreferentie Upload your references | Referenties | Coördinator | Medewerkers

Gosse, J.-P., 1986. Mochokidae. p. 105-152. 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. 3202)

Status op de Rode Lijst van het IUCN (Ref. 130435)

  Niet bedreigd (LC) ; Date assessed: 17 March 2016

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless




Gebruik door de mens

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00718 - 0.02780), b=2.88 (2.72 - 3.04), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.3   ±0.48 se; based on food items.
Weerstandsvermogen (Ref. 120179):  Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Fec = 1,500).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (38 of 100).
Prijsklasse (Ref. 80766):   Unknown.