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Schilbe grenfelli : fisheries
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Schilbe grenfelli
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Teleostei (teleosts) >
Siluriformes
(Catfishes) >
Schilbeidae
(Schilbid catfishes)
Etymology:
grenfelli:
Referring to the type locality of the species, Boma, Lower Zaire River (Ref.
43912
)
.
More on author:
Boulenger
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal. Tropical; 23°C - 26°C (Ref.
12468
); 5°N - 0°N
Africa: lower, middle and upper Congo River basin, including Pool Malebo (= Stanley Pool); Ogooué and Nyanga basins in Gabon; Ntem-Campo, Nyong and Lokoundje basins in Cameroon (Ref.
43912
). Also in the Mitemboni River (Gabon-Equatorial Guinea border) and lower Nkomi River basin (Gabon)(Ref.
81643
). Reports from the Lali River (upper Kouilou basin) in Republic of Congo or from the Chad basin are based on misidentified specimens; presence in the Ruzisi unlikely, based on a single specimen that is probably mislabelled (Ref.
43912
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 50.7 cm SL male/unsexed; (Ref.
81643
)
Dorsal
spines
(total): 1. Diagnosis: adipose fin present (Ref.
43912
,
81643
) and fully developed (Ref.
81643
). Anterior nostrils closer to each other than the posterior pair; nasal barbel not reaching beyond the posterior border of the eye; inner side of pectoral spine weakly serrated; snout reaching beyond lower jaw; head rounded (Ref.
43912
,
81643
).
Omnivorous or predominantly carnivorous, feeding on fruits, leaves, grains, insect larvae and nymphs, and small fish; very voracious; juveniles found in floodplains during the rainy season, often hidden under floating trunks of trees which seems a favorite place for juvenile
Schilbe
and numerous other fish larvae; active swimmer, especially during the night, probably resting near the bottom during daytime (Ref.
43912
). Oviparous, eggs are unguarded (Ref.
205
). Important species in fishery terms (Ref.
78218
). Flesh of this fish very tasty, its price rather elevated (Ref.
43912
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Distinct pairing (Ref.
205
).
De Vos, L.
, 1995. A systematic revision of the African Schilbeidae (Teleostei, Siluriformes). With an annotated bibliography. Ann. Mus. R. Afr. Centr., Sci. Zool., 271:1-450. (Ref.
43912
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
16 February 2009
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: commercial
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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=0.00832 (0.00364 - 0.01900), b=3.06 (2.87 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.5 ±0.5 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Assuming fec > 10,000).
Fishing Vulnerability (Ref.
59153
): Moderate vulnerability (45 of 100).
Price category (Ref.
80766
):
Unknown
.
Nutrients (Ref.
124155
): Calcium = 90.7 [38.7, 207.3] mg/100g; Iron = 1.26 [0.60, 2.34] mg/100g; Protein = 16.8 [15.0, 18.6] %; Omega3 = 0.48 [0.18, 1.26] g/100g; Selenium = 82.4 [36.0, 180.7] μg/100g; VitaminA = 36.8 [13.7, 95.6] μg/100g; Zinc = 1.47 [0.97, 2.10] mg/100g (wet weight);
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