Environment: milieu / climate zone / depth range / distribution range
Marine; freshwater; brackish; demersal. Tropical
South America: Caribbean and Atlantic draining rivers and estuaries from Colombia to Brazil.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 45 - 56.5 cm
Max length : 94.2 cm TL male/unsexed; (Ref. 10652); 62.5 cm TL (female); common length : 30.0 cm TL male/unsexed; (Ref. 3265); max. published weight: 1.5 kg (Ref. 5217)
Adults occur in turbid estuaries, mangrove-lined lagoons and lower parts of rivers being very tolerant to changes in salinity. Found on shallow soft bottoms (Ref. 5217). Feed on a large variety of bottom-living and pelagic organisms including those found among the roots of mangroves. Reproduction occurs between September and December. A female lays 20-30 eggs, with a diameter of 10-12 mm. Males incubate the eggs in their mouth (Ref. 35381).
Females reach maturity at a younger age than males and grow faster. The male incubates 28-40 eggs in the mouth and 200-400 eggs that are fixed in a glutinous mass on its head. Incubation takes 10-12 days. After 50-60 days fully functional young (6-6.5 cm TL) are released.
Chacon, J.O., M.I.M. Alves and M.S.C. de Mesquita, 1994. Alguns aspectos da reprodução do bagre branco, Selenapsis herzbergii (Bloch 1794), Pisces: Ostariophysi, Siluriformes, Ariidae. Bol. Tec. DNOCS. 47/52(1/2):43-78. (Ref. 10652)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 115941)
Threat to humans
Traumatogenic (Ref. 58010)
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 23.4 - 27.9, mean 25.6 (based on 428 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00525 (0.00348 - 0.00792), b=3.15 (3.02 - 3.28), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic Level (Ref. 69278
): 3.3 ±0.39 se; Based on food items.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (tm=2-3; Fec=200).
Vulnerability (Ref. 59153
): Moderate vulnerability (38 of 100) .