Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
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); stewarti: The specific epithet of this species is a patronym in honour of American ichthyologist Donald J. Stewart, who collected the holotype and other material used in the description of this species, as well as assisting in the collection of much of the type series of Tanganikallabes alboperca (Ref. 90118).
Eponymy: Dr Donald James Stewart (d: 1946) is Professor of Environment & Forest Biology at the College of Environmental Science and Forestry, State University of New York, Syracuse, where he presently teaches Ichthyology & Tropical Ecology. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
Africa: Lake Tanganyika (Ref. 90118).
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 15.5 cm SL male/unsexed; (Ref. 90118)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 0; Dorsal soft rays (total): 72 - 79; Anal spines: 0; Anal soft rays: 63 - 69. Diagnosis: Tanganikallabes stewarti is distinguished from all congeners by having an incomplete lateral line, which terminates at a vertical through a point approximately two-thirds of the distance along the anal fin base, vs. lateral line reaching the caudal peduncle in T. mortiauxi and extending much closer to the caudal peduncle in T. alboperca ; and by its relatively shallower body, body depth at anus 8.7-10.9% of standard length vs. 12.3-17.2% in T. mortiauxi and 11.7-14.6% in T. alboperca (Ref. 90118). Tanganikallabes stewarti is further separated from T. mortiauxi by its premaxillary toothpad shape, uniformly thin, broad crescent, vs. widest point anteroposteriorly thicker; lack of a free lower orbital margin; io-iv and the suprapreopercle consisting of multiple separate elements, vs. a single element; the extensions of the lateral ethmoid not reaching io-ii when viewed from above, vs. nearly or completely overlaying io-ii; its proportionally shorter prepelvic length, 35.7-39.2% of standard length vs. 39.7-44.4%; its proportionally shorter preanal length, 42.4-44.8% of standard length vs. 47.1-51.7%; longer anal fin, anal fin base 54.1-58.9% of standard length vs. 47.6-54.2% (Ref. 90118). It can additionally be distinguished from T. alboperca by its lack of a depigmented opercular margin; having longer pelvic fins, 7.1-9.3% of standard length vs. 6.0-7.7%, which reach beyond the origin of the anal fin when adpressed; proportionately longer pectoral fin spines, 5.0-6.8% of standard length vs. 3.6-5.3%; a shorter preanal length, 42.4-44.8% of standard length vs. 45.2-49.0%; and a generally higher number of dorsal fin rays, 72-79 vs. 65-74, and anal fin rays, 63-69 vs. 55-63 (Ref. 90118).
It is likely to inhabit rocky bottoms, over a range of depths (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: Version 2024-2)
Threat to humans
Harmless
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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=0.00759 (0.00343 - 0.01679), b=2.96 (2.78 - 3.14), 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 (10 of 100).
