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Congoglanis alula  (Nichols & Griscom, 1917)

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Native range | All suitable habitat
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Congoglanis alula   AquaMaps   Data sources: GBIF OBIS
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Congoglanis alula
Picture by Mertens, P.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Siluriformes (Catfish) > Amphiliidae (Loach catfishes) > Doumeinae

Environment / Climate / Range Ecology

Freshwater; demersal.   Tropical, preferred ?; 3°N - 10°S, 14°E - 30°E

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Africa: present throughout the Congo River basin (Ref. 78218). In the Lukuga (Tanganyika outflow) up to the Kisimba-Kilia rapids (Ref. 93587). Reports of this species from Inga and the Luongo River (Zambian Congo) refer to Congoglanis inga and C. sagitta, respectively (Ref. 88958). Reports from Luachimo rapids (Ref. 11970) are C. howesi (Ref. 92838).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 14.1 cm SL male/unsexed; (Ref. 88958)

Short description Morphology | Morphometrics

Congoglanis alula differs from C. inga in having a shorter maxillary barbel (not reaching to vertical through anterior margin of orbit, vs. extending well past anterior margin of orbit, respectively), a longer pelvic fin (24–28% SL, vs. 19–21%, respectively), a shorter postorbital length (27–31% HL, vs. 32–35%, respectively), a relatively narrow interorbital width (1.5 times eye diameter, vs. 2 times, respectively), and shorter anal-fin rays (posterior rays of adpressed anal fin extend to, rarely slightly beyond, vertical through posterior limit of adipose fin, vs. posterior rays extend well past vertical through posterior limit of adipose fin, respectively). Congoglanis alula differs from C. sagitta in having a longer pectoral fin (28–29% SL, vs. 23–27%, respectively), a longer pelvic fin (24–28% SL, vs. 19–21%, respectively), a shorter caudal peduncle (18–22% SL, mean 19.4, vs. 21–24% SL, mean 22.4, respectively) and deeper caudal peduncle (caudal-peduncle depth 2.6–3.3 times in caudal-peduncle length, vs. 3.1–4.0 times, respectively), a relatively narrow interorbital width (1.5 times eye diameter, vs. 2 times, respectively), a more posteriorly placed anal fin (anal-fin origin approximately at tip of adpressed pelvic fin,vs. origin well in advance of tip of adpressed pelvic fin, respectively), and fewer vertebrae (36–39, mode 37, vs. 39–41, mode 40, respectively) (Ref. 88958).

Biology     Glossary (e.g. epibenthic)

Demersal species living in big rapids. Typically found in fastest flowing portions of rivers and always associated with large rocks; appears to congregate underneath rocks near where water breaks over the rocks during the day, and will move out onto the tops of rocks at night (Ref. 88958).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Ferraris, C.J. Jr., R.P. Vari and P.H. Skelton, 2011. A new genus of African loach catfish (Siluriformes: Amphiliidae) from the Congo River basin, the sister-group to all other genera of the Doumeinae, with the description of two new species. Copeia 2011(4):477-489. (Ref. 88958)

IUCN Red List Status (Ref. 109396)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries:
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), based on all LWR estimates for this body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.1   ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Moderate vulnerability (39 of 100) .
Price category (Ref. 80766):   Unknown.