Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Siluriformes (Catfishes) > Doradidae (Thorny catfishes) > Doradinae
Etymology: Oxydoras: Greek, oxys = sharp + Greek, dora = skin (Ref. 45335).
More on author: Valenciennes.

Issue
Occurrence in Orinoco basin tentative, dependent upon identification of questionable synonym Oxydoras holdeni Fernández-Yépez; specimens of Oxydoras niger reported from Venezuela by Fernández-Yépez 1968:57 pertain to Oxydoras sifontesi Fernández-Yépez. Species-level distinctiveness of São Francisco and Amazonas Oxydoras not investigated.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal; pH range: 6.0 - 7.8; dH range: ? - 25. Tropical; 21°C - 24°C (Ref. 2060)

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

South America: Amazon, São Francisco and Essequibo River basins. Possibly in the Orinoco River basin.

Length at first maturity / Size / Weight / Age

Maturity: L_m 62.5 range ? - ? cm
Max length : 100.0 cm SL male/unsexed; (Ref. 37054); common length : 59.0 cm SL male/unsexed; (Ref. 9081); max. published weight: 11.0 kg (Ref. 40637); max. published weight: 11.0 kg

Occurs over mud in streams and lakes. Forms schools (Ref. 9084). Feeds on detritus, chironomid and ephemeropteran larvae, and crustaceans (Ref. 9096). Known from temperatures ranging from 24-29.8 °C, pH range of 5-9, and an alkalinity range of 42-142.

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

Main reference Upload your references | References | Coordinator : Ferraris, Jr., Carl J. | Collaborators

Sabaj, M.H. and C.J. Ferraris Jr., 2003. Doradidae (Thorny catfishes). p. 456-469. 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. 37054)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Least Concern (LC) ; Date assessed: 02 December 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: minor commercial; aquarium: commercial

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet composition
Food consumption
Food rations
Predators

Ecology
Ecology

Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
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Abundance

Life cycle
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Maturity/Gills rel.
Fecundity
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Eggs
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Distribution
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Anatomy
Gill area
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Otolith

Physiology
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Nutrients
Oxygen consumption
Swimming type
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Visual pigments
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Genetics
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Summary page | Point data | Common names | Photos

Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01549 (0.01272 - 0.01886), b=3.01 (2.95 - 3.07), in cm total length, based on LWR estimates for this species (Ref. 93245).

Trophic level (Ref. 69278): 2.8 ±0.29 se; based on food items.

Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): High to very high vulnerability (73 of 100).

Price category (Ref. 80766): Unknown.

Oxydoras niger (Valenciennes, 1821)