Actinopteri (ray-finned fishes) > Siluriformes
(Catfishes) > Doradidae
(Thorny catfishes) > Doradinae
Etymology: Megalodoras: Greek, megas, megalos = great + Greek, doras = skin (Ref. 45335).
More on authors: Eigenmann & Eigenmann.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical; 22°C - 25°C (Ref. 2059)
South America: Amazon, Tocantins and Essequibo River basins.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 54 - ? cm
Max length : 53.0 cm SL male/unsexed; (Ref. 9081); 60.0 cm SL (female); common length : 49.0 cm SL male/unsexed; (Ref. 9081); max. published weight: 2.9 kg (Ref. 9081); max. published weight: 2.9 kg
Occurs in small groups and occasionally forms schools. Inhabits rivers. Is mainly diurnal. Feeds on the fruits of Licania longipetala and Astrocaryum jauary. Also feeds on pulmonate snails (Ref. 9086).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. 125652)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00681 - 0.02028), b=3.02 (2.87 - 3.17), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 2.7 ±0.39 se; based on food items.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Moderate to high vulnerability (49 of 100).