Classification / Names आम नाम | उपशब्द | Catalog of Fishes(वर्ग, प्रजाति) | ITIS | CoL | WoRMS | Cloffa

> Gymnotiformes (Knifefishes) > Gymnotidae (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335); arapaima: Named for the pirarucu Arapaima gigas (Teleostei: Osteoglossomorpha), referring to the elongate and slightly depressed head, which it resembles. Noun in apposition..

Environment: milieu / climate zone / depth range / distribution range पारिस्थितिकी

; स्वच्छ जल, अलवण जल ड़िमरसल; pH range: 6.3 - 7.2. Subtropical

वितरण देश | ऐफ ऐ ओ क्षेत्र | Ecosystems | संयोग | Point map | भूमिका | Faunafri

South America: Mamirauá lake system, Lago Tefé, and terra firme swamps near the town of Tefé in Central Amazonia.

आकार / वज़न / Age

Maturity: L_m ? range ? - ? cm
Max length : 55.0 cm TL पुल्लिंग / अलिंग; (Ref. 41292); अधिकतम प्रकाशित वज़न: 450.00 g (Ref. 41292)

Short description पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स

Possess reverse counter shading (lighter on top) in which the dark bands are interrupted dorsally and the pale interband regions merge on the dorsum and in which the dorsum has a silver-blue sheen in life, and very large anterior nares (diameter about that of eye), associated with a large cleft in the anterolateral margin of the ethmoid region resulting in a square anterior margin of snout between the anterior nares. With deep body (body depth 11-13% TL versus 6-10): long head (head length 12.7-13.6% TL versus 8.8-12.6), and depressed head (head depth 53-57% TL versus 58-64) (Ref. 41292).

Facultative air-breathing in the genus (Ref. 126274); Juveniles commonly collected in várzea floating meadows, adults in várzea flooded forest but rarely caught in floating meadows where they are presumed to spawn.

Life cycle and mating behavior Maturities | पुनरुत्पत्ति | Spawnings | Egg(s) | Fecundities | लार्वा

Main reference Upload your references | संदर्भ | संयोजक : Campos-da-Paz, Ricardo | सहयोगीयो

Albert, J.S. and W.G.R. Crampton, 2001. Five new species of Gymnotus (Teleostei: Gymnotiformes) from an upper Amazon floodplain, with descriptions of electric organ discharges and ecology. Ichthyol. Explor. Freshwat. 12(3):241-266. (Ref. 41292)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 12 August 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
Diet compositions
Food consumptions
Food rations
परभक्षी

Ecology
पारिस्थितिकी

Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances

Life cycle
पुनरुत्पत्ति
Maturities
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Spawnings
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Egg(s)
Egg developments
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Distribution
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Anatomy
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Physiology
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Genetics
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Human related
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Ciguatera cases
Stamps, coins, misc.

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इंटरनेट स्रोत

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00437 (0.00209 - 0.00911), b=2.98 (2.79 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.2 ±0.40 se; based on food items.

लौटाव (Ref. 120179): माध्यम, न्यूनतम जनसंख्या दुगनी होने का समय 1.4 - 4.4 वर्ष। (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (42 of 100).

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Gymnotus arapaima Albert & Crampton, 2001