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Africa: middle and lower courses of coastal rivers from Guinea-Bissau (Geba and Corubal Rivers) to Liberia (Cess River)(Ref.
53405
). Possibly also present in Côte d'Ivoire (Ref.
272
).
Size / Weight / Age
Maturity: L
m
?
range ? - ? cm
Max length : 24.8 cm SL male/unsexed; (Ref.
7378
)
Dorsal
spines
(total): 15 - 17;
Dorsal
soft rays
(total): 11-14;
Anal
spines
: 3;
Anal
soft rays
: 8 - 10. Diagnosis: body oblong (body depth 32.0-46.1% SL); outer teeth on jaws bicuspid and spatulated; micro-gillrakers present; transversal bands on the flanks (Ref.
53405
).
Pair-bonding, open substratum spawner, with both parents guarding the brood; seems to breed throughout the year; development time of larvae, from deposition of eggs to free swimming stage, takes about 13 to 14 days (Ref.
52307
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Teugels, G.G. and D.F.E. Thys van den Audenaerde
, 1991. Tilapia. p. 482-508. In J. Daget, J.-P. Gosse, G.G. Teugels 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. 4. (Ref.
5163
)
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5078 [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
): 2.1 ±0.2 se; based on size and trophs of closest relatives
Generation time: 1.6 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (K=0.69).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (22 of 100).
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