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Synodontis ocellifer : fisheries
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drawing shows typical species in Mochokidae.
Teleostei (teleosts) >
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
Ecology
Freshwater; benthopelagic; potamodromous (Ref.
51243
). Tropical; 23°C - 27°C (Ref.
12468
)
Africa: basins of the Senegal, Gambia, Niger (including Benue), Volta and Chad (Ref.
57223
). Also in the Densu system (Ghana) and Kwa Ibo (Nigeria) (Ref.
57223
).
Length at first maturity / Size / Weight / Age
Maturity: L
m
 
?
, range 12 - ? cm
Max length : 49.0 cm TL male/unsexed; (Ref.
57223
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 1;
Anal
spines
: 0. Diagnosis: gill slits not extending ventrally beyond pectoral-fin insertions; post-orbital length at least 60% of snout length; maxillary barbels longer than head, unbranched, without tubercles and lacking a distinct basal membrane; outer and inner mandibular barbels with numerous long and simple ramifications; mandibular teeth numbering 19-28 (28 in the lectotype); denticulations of pectoral-fin spines weaker and more dense on outer than on inner margin; dorsal-fin spine smooth anteriorly, except for a few apical denticles; humeral process twice as long as deep, granulose, pointed and slightly keeled ventrally; adipose fin well developed and distinctly separated from rayed dorsal fin; sides covered with big black ocellated spots (with a pale centre); no black spot behind dorsal fin (Ref.
57223
). Coloration: colour rather light; sides and adipose fin marked with large black spots, sometimes with light centres resembling eyespots (ocelli); presence of such ocelli visible particularly in large individuals; adults usually with small spots aligned on caudal fin; speckled pattern extends unto all fins in young specimens, fading subsequently with growth (Ref.
57223
).
Oviparous (Ref.
205
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Oviparous (Ref.
205
). Distinct pairing during breeding (Ref.
205
).
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 Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
23 October 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: commercial
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01820 (0.00985 - 0.03362), b=2.92 (2.76 - 3.08), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.1 ±0.41 se; based on food items.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Moderate vulnerability (39 of 100).
Price category (Ref.
80766
):
Unknown
.
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Page last modified by :
mrius-barile
- 20 July 2016
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