Teleostei (teleosts) > Siluriformes
(Catfishes) > Pimelodidae
Etymology: Hemisorubim: Greek, hemi = half + Brazilian local name, sorubim (Ref. 45335).
More on author: Valenciennes.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal; pH range: 6.0 - 7.8; dH range: ? - 25. Subtropical; 20°C - 22°C (Ref. 2060)
South America: Amazon, Maroni, Orinoco, and Paraná River basins.
Length at first maturity / Size / Weight / Age
Maturity: Lm 31.6  range ? - ? cm
Max length : 61.0 cm TL (female); max. published weight: 2.7 kg (Ref. 111728)
Rather rare, confined to the deeper and slow-moving parts of large rivers together with some Loricaria and Potamotrygon. Its body shape and color pattern are perfectly adapted to the muddy bottom where they stay (Ref. 35381). Feeds on benthic organisms and fish. The position of the eyes and the shape of the mouth of this piscivorous fish give to its stalking mode of hunting (Ref. 35381).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Lundberg, J.G. and M.W. Littmann, 2003. Pimelodidae (Long-whiskered catfishes). p. 432-446. 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. 36506)
IUCN Red List Status (Ref. 126983)
Threat to humans
Fisheries: commercial; aquarium: public aquariums
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00575 - 0.00795), b=3.12 (3.07 - 3.17), in cm total length, based on LWR estimates for this species (Ref. 93245
Trophic level (Ref. 69278
): 4.5 ±0.80 se; based on food items.
Generation time: 4.9 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
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 (45 of 100).
Nutrients (Ref. 124155
): Calcium = 49.7 [19.0, 141.3] mg/100g ; Iron = 1.31 [0.68, 2.81] mg/100g ; Protein = 18 [16, 20] % ; Omega3 = 0.455 [0.195, 1.071] g/100g ; Selenium = 36.7 [14.8, 83.4] μg/100g ; VitaminA = 28.3 [9.5, 87.8] μg/100g ; Zinc = 0.674 [0.449, 0.997] mg/100g (wet weight); based on nutrient studies.