Ambiente: milieu / zona climática / intervalo de profundidade / gama de distribuição
Ecologia
; Água doce bentopelágico; pH range: 6.0 - 7.5; dH range: ? - 15; potamódromo (Ref. 51243). Subtropical; 22°C - 28°C (Ref. 1672)
Central and South America: southern Mexico to Paraguay, including Trinidad.
Comprimento na primeira maturidade / Tamanho / Peso / Idade
Maturidade: Lm 19.4, range 25 - ? cm
Max length : 76.0 cm TL macho/indeterminado; (Ref. 79585); peso máx. Publicado: 1.2 kg (Ref. 79585)
Descrição breve
Chaves de identificação | Morfologia | Morfometria
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).
Ciclo de vida e comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
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).
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)
Categoria na Lista Vermelha da IUCN (Ref. 130435: Version 2025-2 (Global))
Ameaça para o homem
Harmless
Utilização humana
Pescarias: sem interesse; Aquário: Espécies comerciais
Ferramentas
Relatórios especiais
Descarregue XML
Fontes da internet
Estimativas baseadas em modelos
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00380 (0.00293 - 0.00494), b=2.92 (2.84 - 3.00), in cm total length, based on LWR estimates for this species (Ref.
93245).
Nível Trófico (Ref.
69278): 3.6 ±0.56 se; based on food items.
Generation time: 3.6 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
Resiliência (Ref.
120179): Médio, tempo mínimo de duplicação da população 1,4 - 4,4 anos (tm=2).
Vulnerabilidade da pesca (Ref.
59153): Moderate vulnerability (37 of 100).
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Nutrientes (Ref.
124155): Calcium = 51.3 [21.6, 112.8] mg/100g; Iron = 0.975 [0.510, 1.782] mg/100g; Protein = 18.3 [17.1, 19.6] %; Omega3 = 0.33 [0.13, 0.83] g/100g; Selenium = 25.6 [9.8, 63.4] μg/100g; VitaminA = 21.8 [6.9, 67.1] μg/100g; Zinc = 1 [1, 1] mg/100g (wet weight);
