Actinopteri (ray-finned fishes) > Siluriformes
(Catfishes) > Auchenipteridae
(Driftwood catfishes) > Auchenipterinae
Etymology: Auchenipterus: Greek, auchen = neck + Greek, pteryx = fin (Ref. 45335).
More on authors: Spix & Agassiz.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; pelagic; pH range: 6.7 - 7.2; dH range: 7 - 16. Tropical; 20°C - 22°C (Ref. 2060)
South America: Lower Amazon and Tocantins rivers northward to Marowijne River. Possibly also Rupununi River in Guyana and Negro River in Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 27.0 cm SL male/unsexed; (Ref. 26147)
Inhabits lower courses of the larger rivers. Free swimming species found near the surface. Nocturnal, plus active during dusk and dawn. Feeds on smaller fish. The male is recognizable by his thick, ossified maxillary barbels and by the first few rays of the anal fin which are fused, supporting the urogenyla tube that runs along the anterior border to the tip of the rays (Ref. 6868). This fish comprises the majority of the catches in the fish nets and is especially captured during the rainy season which is its reproductive period. Occurs less frequently in flood zones, prefers eroded zones where it appears in large numbers (Ref. 27188).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Ferraris, C.J. Jr., 2003. Auchenipteridae (Driftwood catfishes). p. 470-482. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 37098)
IUCN Red List Status (Ref. 125652)
Threat to humans
Fisheries: minor commercial; aquarium: commercial
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00636 - 0.01501), b=2.92 (2.79 - 3.05), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 3.6 ±0.51 se; based on food items.
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (K=0.65).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (23 of 100).