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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 पारिस्थितिकी

; स्वच्छ जल, अलवण जल ड़िमरसल. Tropical

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South America: Amazon, Orinoco and Essequibo River basins.

आकार / वज़न / Age

Maturity: L_m ? range ? - ? cm
Max length : 29.8 cm TL पुल्लिंग / अलिंग; (Ref. 111518); अधिकतम प्रकाशित वज़न: 240.00 g (Ref. 111518)

Life cycle and mating behavior परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा

Main reference Upload your references | संदर्भ | संयोजक : Ferraris, Jr., Carl J. | सहयोगीयो

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)

Least Concern (LC) ; Date assessed: 21 July 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

अधिक जानकारी

Trophic ecology
खाद्य पदार्थ
संघटक आहार
आहार खपत
Food rations
परभक्षी

Ecology
पारिस्थितिकी

Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
भर्ती
बहुतायत

Life cycle
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Maturity/Gills rel.
Fecundity
मछलीऔ का अंडे देना
Spawning aggregations
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लार्वा
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हैरेटिबिलटी

Human related
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खींच
Ciguatera cases
Stamps, coins, misc.

Outreach
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इंटरनेट स्रोत

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 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).

Trophic level (Ref. 69278): 2.8 ±0.4 se; based on size and trophs of closest relatives

लौटाव (Ref. 120179): ऊंचा, न्यूनतम जनसंख्या दुगनी समय अवलागत 15 महीने। (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (20 of 100).

Hassar orestis (Steindachner, 1875)