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Tanganikallabes mortiauxi : fisheries
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Tanganikallabes mortiauxi
Picture by
RMCA / Mark Hanssens
Teleostei (teleosts) >
Siluriformes
(Catfishes) >
Clariidae
(Airbreathing catfishes)
Etymology:
Tanganikallabes:
Composed from lake Tanganyka + Greek, allabes, -etos = a fish of the Nile, a kind of lamprey (Ref.
45335
)
.
More on author:
Poll
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal. Tropical; 3°S - 9°S
Africa: Lake Tanganyika (Ref.
90118
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 32.5 cm TL male/unsexed; (Ref.
90118
)
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 72-83;
Anal
spines
: 0;
Anal
soft rays
: 58 - 65. Diagnosis:
Tanganikallabes mortiauxi
is distinguished from its congeners by the morphology of the vomerine toothpad, which, at its widest point anteroposteriorly, is thicker than the premaxillary toothpad, vs. a uniformly thin, broad crescent in other
Tanganikallabes
species; the presence of a complete lateral line, vs. incomplete lateral line; free lower orbital margin, vs. no free margin; well-defined, thick basal membranes on the barbels, vs. thin membranes; and a larger eye, 1.8-3.0% of standard length vs. 0.8-1.6% in
Tanganikallabes alboperca
or 1.0-1.9% in
T. stewarti
(Ref.
90118
). The cranial osteology of
T. mortiauxi
further separates this species from all congeners: in
T. mortiauxi
, io-iv consists of a single element, vs. two separate elements in
T. alboperca
and
T. stewarti
; similarly, the suprapreopercle of
T. mortiauxi
is composed of a single element, whereas that of
T. alboperca
and
T. stewarti
is composed of two, or sometimes three, elements; furthermore, the extensions of the lateral ethmoid nearly overlie io-ii when viewed from above, but are well separated in
T. alboperca
and
T. stewarti
(Ref.
90118
).
Tanganikallabes mortiauxi
can also be distinguished from
T. alboperca
by having longer pelvic fins, 7.4-9.3% of standard length vs. 6.0-7.7%, that reach beyond the origin of the anal fin when adpressed; longer pectoral fin spines, 5.6-8.8% of standard length vs. 3.6-5.3; a higher number of dorsal fin rays, 72-81 vs. 65-74; and the lack of a depigmented opercular margin (Ref.
90118
).
Tanganikallabes mortiauxi
is further separated from
T. stewarti
by its proportionally longer prepelvic length, 39.7-44.4% of standard length vs. 35.7-39.2%; its proportionally longer preanal length, 47.1-51.7% of standard length vs. 42.4-44.8%; and shorter anal fin, anal fin base 47.6-54.2% of standard length vs. 54.1-58.9% (Ref.
90118
).
Found in littoral to benthic zones over rocky bottoms; this species may inhabit rocky bottoms over a wide range of depths (Ref.
78218
,
90118
). It appears to be an opportunistic, generalist predator feeding on eggs of fish species, platythelphusid crabs, atyid shrimps and insect larvae (Ref.
90118
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Wright, J.J. and R.M. Bailey
, 2012. Systematic revision of the formerly monotypic genus
Tanganikallabes
(Siluriformes: Clariidae). Zool. J. Linn. Soc. 165:121-142. (Ref.
90118
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
31 January 2006
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries:
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00741 (0.00333 - 0.01648), b=2.97 (2.78 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (23 of 100).
Price category (Ref.
80766
):
Unknown
.
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- 20 July 2016
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