Suriname country information

Common names: [No common name]
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Recorded from the Coppename (Rechter, Linker and Midden) River (Ref. 59052). Also Ref. 42925. Not in Ref. 36692.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ns.html
National Fisheries Authority: http://www.caricom-fisheries.com/suriname
Occurrences: Occurrences Point map
Main Ref: Alonso, L.E. and H.J. Berrenstein, 2006
National Database:

Common names from other countries

Gymnote rayé, Carapo, Cutlass fish, ... more

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> Gymnotiformes (Knifefishes) > Gymnotidae (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335).
More on author: Linnaeus.

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

; zoet water benthopelagisch; pH range: 6.0 - 7.5; dH range: ? - 15; potamodroom (Ref. 51243). Subtropical; 22°C - 28°C (Ref. 1672)

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Central and South America: southern Mexico to Paraguay, including Trinidad.

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturity: L_m 19.4, range 25 - ? cm
Max length : 76.0 cm TL mannelijk / geslacht onbekend; (Ref. 79585); max. gepubliceerd gewicht: 1.2 kg (Ref. 79585)

Facultative air-breathing (Ref. 126274); Aggressive (Ref. 27188). Inhabits turbid slow moving or standing waters (Ref. 11225). Found also in shallow edges of streams (Ref. 75964). Can survive when ditches, canals and small ponds dry out. (Ref. 11225). Feeds mainly at night on worms, insects (e.g. odonate larvae), shrimps, fish (preferably small characids, e.g. Ctenobrycon and Curimata) and plant matter (Ref. 7020; 10011). Oviparous (Ref. 205). Mouth brooding by males is observed in this species (Ref. 55570). Males provide parental care in nests excavated for eggs and larvae (Ref. 55570). Uses its long anal fin for locomotion. Can distinguish between a `friendly neighbor' and a potentially `threatening stranger' based on electric organ discharge (EOD) waveform alone (Ref. 10011). Relationship between EOD pattern and agonistic behavior in this species has been demonstrated (Refs. 10531, 10532, 10533). Shows auditory abilities, responding best to a frequency of 1000 Hz, with an upper limit above 5000 Hz (Ref. 10831). Also responds to vibratory stimuli (water waves: 125-250 Hz) with transient increase in EOD rate (Ref. 10834). 'Prefers' temperatures of 24-25°C (Ref. 10836).

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Parental care is provided by the male. The male sits on a depression with its anal fin expanded horizontally guarding a cluster of larvae. More larvae are spread out in leaf litter up to 2 m away (Ref. 55570).

Hoofdreferentie Upload your references | Referenties | Coördinator : Campos-da-Paz, Ricardo | Medewerkers

Campos-da-Paz, R., 2003. Gymnotidae (Naked-back knifefishes). p. 483-486. 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. 36692)

Status op de Rode Lijst van het IUCN (Ref. 130435)

Niet bedreigd (LC) ; Date assessed: 09 July 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

Visserij: van geen belang; Aquarium: Commercieel

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00380 (0.00292 - 0.00495), b=2.93 (2.85 - 3.01), in cm Total Length, based on LWR estimates for this species (Ref. 93245).

Trofisch niveau (Ref. 69278): 3.6 ±0.56 se; based on food items.

Weerstandsvermogen (Ref. 120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (tm=2).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (37 of 100).

Gymnotus carapo Linnaeus, 1758