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Citharidium ansorgii : fisheries
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Citharidium ansorgii
Picture by
Hippocampus-Bildarchiv
Teleostei (teleosts) >
Characiformes
(Characins) >
Citharinidae
(Lutefishes)
Etymology:
Citharidium:
Latin, cithara = lire like instrument, diminutive (Ref.
45335
)
.
More on author:
Boulenger
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal. Tropical
Africa: found only in the Niger basin in Nigeria (Ref.
2938
,
7095
,
81281
). Maps in Ref.
2938
,
81281
, Ref. 31256 and Ref. 51193 also mention presence in Bénué basin. Species has also been reported from Chad basin in Cameroon (Ref.
51193
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 58.6 cm SL male/unsexed; (Ref.
2938
); max. published weight: 9.1 kg (Ref.
7095
)
Dorsal
soft rays
(total): 17-19;
Anal
soft rays
: 19 - 22. Diagnosis: snout longer than eye diameter; body depth 1.7-2.2x and head length 2.8-3.3x SL; caudal peduncle 0.8-0.9x long than deep; scale formula 12.5/46-51/14.5-16.5; 12.5 scales between lateral line and pelvic-fin base; characterized by ctenoid scales; scales without denticulations on posterior margin, but with parallel ridges prolonged as spines beyond posterior margin; short pectorals, half of head length; pelvic fins longer than pectorals, provided with scaly process at their bases; 17-19 dorsal fin branched rays; 19-22 anal fin branched rays (Ref.
2938
,
81281
).
Maximum TL was recorded at 69.7 cm (Ref.
7095
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Gosse, J.-P.
, 1990. Citharinidae. p. 261-268. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren and O.R.S.T.O.M., Paris, 384 p. (Ref.
2938
)
IUCN Red List Status (Ref.
130435
)
Data deficient (DD)
; Date assessed:
06 May 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries:
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 1.0039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01585 (0.00617 - 0.04070), b=2.96 (2.74 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 2.1 ±0.1 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Moderate to high vulnerability (49 of 100).
Price category (Ref.
80766
):
Unknown
.
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mrius-barile
- 20 July 2016
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