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Siluriformes (Catfishes) >
Doradidae (Thorny catfishes) > Doradinae
Etymology: Hassar: Origin of the name was not specified by the author, but it is possible that it refers to the name commonly applied to certain catfishes in Guyana, such as Hoplosternum littorale or Hypostomus watawata.
Eponymy: Orestes Hawley St John (1841–1921) was a palaeontologist who was a member of the Thayer Expedition to Brazil. [...] (Ref. 128868), visit book page.
More on author: Steindachner.
Issue
Occurrence in Colombia and Peru tentative, based on questionable synonym Hassar ucayalensis Fowler.
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt gần đáy. Tropical
South America: Amazon, Orinoco and Essequibo River basins.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ?  range ? - ? cm
Max length : 29.8 cm TL con đực/không giới tính; (Ref. 111518); Khối lượng cực đại được công bố: 240.00 g (Ref. 111518)
Life cycle and mating behavior
Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng
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 2024-2)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00955 (0.00553 - 0.01649), b=2.94 (2.79 - 3.09), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 2.8 ±0.4 se; based on size and trophs of closest relatives
Thích nghi nhanh (Ref.
120179): Chiêù cao, thời gian nhân đôi của chủng quần tối thiểu là dưới 15 tháng (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (20 of 100).