Brazil country information

Common names: [No common name]
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: never/rarely | Ref:
Regulations: no regulations | Ref:
Uses: no uses
Comments: Type locality of the holotype of Gymnotus darwini: Rio Botafogo basin, at Refugio Ecol´ogico Charles Darwin, Igarassu (Ref. 128926).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/br.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Campos-da-paz, R. and C.D. de Santana, 2019
National Database:

Common names from other countries

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> Gymnotiformes (Knifefishes) > Gymnotidae (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335); darwini: Named for Charles Robert Darwin, an English naturalist; a patronym (Ref. 128926).

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

; zoet water benthopelagisch. Tropical

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South America: Brazil.

Grootte / Gewicht / Leeftijd

Maturity: L_m ? range ? - ? cm
Max length : 15.7 cm TL mannelijk / geslacht onbekend; (Ref. 128926)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale zachte stralen (totaal) : 12 - 14; Anale zachte stralen: 215 - 260. This species can be distinguished from all congeners in the 'Gymnotus carapo group clade' by the following set of characters: unique set of characters of uncertain polarity, including the number of prominent dark bands along the body, dark bands along body 3-4 times wider than pale interbands, with almost straight margins (never broken anteriorly into irregular dark spots), and bands almost uniform in color; number of scales above lateral line; number of lateral-line perforated scales to first ventral ramus; number of total pored lateral-line scales; head length; snout length; body depth; number of anal-fin rays; number of pectoral-fin rays; number of precaudal vertebrae; number of teeth on anterior row of premaxilla; and number of teeth along outer row of dentary (Ref. 128926).

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

Campos-da-paz, R. and C.D. de Santana, 2019. A new species of the electric knifefish Gymnotus Linnaeus (Gymnotiformes: Gymnotidae) from northeastern Brazil. Copeia 107:144-151. (Ref. 128926)

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

Niet bedreigd (LC) ; Date assessed: 01 July 2021

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = No PD50 data [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).

Trofisch niveau (Ref. 69278): 3.3 ±0.4 se; based on size and trophs of closest relatives

Weerstandsvermogen (Ref. 120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Gymnotus darwini Campos-da-Paz, de & Santana, 2019