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Oreochromis upembae
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drawing shows typical species in Cichlidae.
Teleostei (teleosts) >
Cichliformes
(Cichlids, convict blennies) >
Cichlidae
(Cichlids) > Pseudocrenilabrinae
Etymology:
Oreochromis:
Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
Africa: upper parts of the Congo River (Ref.
54847
,
55074
), mainly the Upemba region and the Lualaba River to Yangambi and Isangi in the Democratic Republic of Congo (Ref.
5166
,
52307
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 21.0 cm SL male/unsexed; (Ref.
2
)
Dorsal
spines
(total): 14 - 16;
Dorsal
soft rays
(total): 11-13;
Anal
spines
: 3;
Anal
soft rays
: 9 - 12;
Vertebrae
: 29 - 30. Diagnosis:
Oreochromis upembae
is a deep-bodied species with a short head, which looks very similar to
O. malagarasi
(Ref.
52307
). It is distinguished by following characters: mature males with a bifid and tuberculate genital papilla, prolonged into a cream-coloured tassel in breeding males, in which the edges of the dorsal and caudal fins are orange-coloured or red; two to four dark blotches mid-laterally from operculum to caudal peduncle and a blotch on top of caudal peduncle, distinctive in that the blotches are rather large and vaguely outlined and persist in adults; caudal fin with dark, narrow, vertical stripes or series of spots, only a little less regular than in
O. niloticus
; caudal rays rather densely scaled to near edge; caudal peduncle deep; vertebrae 29-30; scales in lateral line series 28-31; dorsal spines XIV-XVI, soft rays 11-13; outer teeth bicuspid, in some fishes becoming unicuspid by wear; lower pharyngeal teeth fine, the tooth area with rounded lateral lobes, the blade 1.15-1.5 times the medial length of the toothed area; lower gill-rakers 20-25; and interorbital width 38.8-43.3% length of head (Ref.
2
). Among the tasselled tilapias this most resembles
O. malagarasi
, which differs in having a less scaly caudal fin, the scales usually confined to the basal parts of the rays, and in lacking the regular dark stripes or series of spots on the caudal; and in
O. malagarasi
the range of dorsal spines is higher, XVI-XVII (Ref.
2
).
A maternal mouthbrooder (Ref.
52307
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
The female broods the young and eggs in the mouth in the shelter of sandbanks in the Congo River at Yangambi (Ref.
2
).
Trewavas, E.
, 1983. Tilapiine fishes of the genera
Sarotherodon
,
Oreochromis
and
Danakilia
. British Mus. Nat. Hist., London, UK. 583 p. (Ref.
2
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
01 May 2009
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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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=0.01905 (0.00827 - 0.04391), b=3.01 (2.82 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 2.5 ±0.24 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 (16 of 100).
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- 20 July 2016
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