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Schilbe yangambianus, Yangambi butterbarbel : fisheries
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Yangambi butterbarbel
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Schilbe yangambianus
Picture by
Mertens, P.
Teleostei (teleosts) >
Siluriformes
(Catfishes) >
Schilbeidae
(Schilbid catfishes)
Etymology:
yangambianus:
Referring to the type locality of this species, Yangambi (Middle Congo)(Ref. 43912).
.
More on author:
Poll
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal. Tropical
Africa: middle Congo River basin including the drainages of the Ubangi, Kasai and Kwando (Ref.
43912
) and Lukenie basin (Ref.
127185
); also known from a single locality on the upper Zambezi river in Zambia (Ref.
43912
). Also reported from the upper Congo (Ref.
106245
) and the Zambezi in Angola (Ref.
120641
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 25.0 cm SL male/unsexed; (Ref.
3570
)
Anal
spines
: 0. Diagnosis: adipose fin always present; anterior nostrils closer to each other or at same distance as posterior ones; barbels well developed, nasal barbel at least reaching to anterior border of opercle; snout reaching beyond lower jaw, upper lips slightly surrounding lower jaw when mouth is closed; inner side of pectoral spine feebly serrated; striking brownish colour pattern, often irregularly marbled and characterized by the presence of a very dark blotch above pectoral spine, where swim-bladder lies close below skin; eyes rather small (Ref.
43912
).
Prefer smaller forest streams with rocky (Ref.
7248
,
43912
) or sandy bottom (Ref.
43912
). Nocturnal (Ref.
43912
). Probably carnivorous (Ref.
43912
), with a preference for terrestrial and aquatic insects (Ref.
7248
,
43912
). Oviparous, eggs are unguarded (Ref.
205
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Distinct pairing (Ref.
205
).
Skelton, P.H.
, 1993. A complete guide to the freshwater fishes of southern Africa. Southern Book Publishers. 388 p. (Ref.
7248
)
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
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=0.00589 (0.00263 - 0.01321), b=3.02 (2.83 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 2.9 ±0.45 se; based on food items.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Assuming fec > 10,000).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (21 of 100).
Price category (Ref.
80766
):
Unknown
.
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- 20 July 2016
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