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Tylochromis sudanensis : fisheries
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drawing shows typical species in Cichlidae.
Teleostei (teleosts) >
Cichliformes
(Cichlids, convict blennies) >
Cichlidae
(Cichlids) > Pseudocrenilabrinae
Etymology:
Tylochromis:
Greek, tylos = callus + Greek, chromis = a fish, perhaps a perch (Ref.
45335
)
;
sudanensis:
Named by Daget (1954) presumably in reference to the middle Niger localities he sampled in the French Sudan; the French term "soudanienne" (Soudan) is anglicized by Beadle (1974) and Lowe-McConnell (1975, 1985) as "soudanian" (Ref.
52346
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical; 18°N - 5°N
Africa: Upper and middle Niger, and the rivers Bénoué, Cross and Wouri in Nigeria and Cameroon (Ref.
53405
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 20.0 cm SL male/unsexed; (Ref.
81260
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 13 - 16;
Dorsal
soft rays
(total): 13-15;
Anal
spines
: 3;
Anal
soft rays
: 7 - 8;
Vertebrae
: 28 - 29. Diagnosis: 13 or fewer (rarely 14) gill-rakers along lower limb of first arch; 37-43 lateral line scales; head length 28.0-34.1% of standard length; predorsal length 36.5-43.2% of standard length; more gradual rise in dorsal spine length from 1st to 6th-7th; pectoral fin relatively short, rarely reaching level of spinous anal fin (Ref.
52346
).
Prefers algae and plant matter, as well as invertebrates; maternal mouthbrooder that does not pair-bond (Ref.
52307
). Maximum total length 26.0 cm (Ref.
42518
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Mouth brooder (male or female is unknown).
Lamboj, A.
, 2004. The Cichlid Fishes of Western Africa. Birgit Schmettkamp Verlag, Bornheim, Germany. 255 p. (Ref.
52307
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
10 January 2020
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries:
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Zoological Record
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=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 2.6 ±0.25 se; based on food items.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (14 of 100).
Price category (Ref.
80766
):
Unknown
.
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Page last modified by :
mrius-barile
- 20 July 2016
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