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Teleostei (teleosts) > Gymnotiformes (Knifefishes) > Gymnotidae (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335); diamantinensis: Named for the municipality of Diamantino (Mato Grosso State, Brazil).

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

Freshwater; pelagic. Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Tapajós River basin in Brazil.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 12.5 cm TL male/unsexed; (Ref. 42925)

Short description Identification keys | Morphology | Morphometrics

Anal soft rays: 194 - 211. Branched anal-fin rays posterior to ray 18 or 19 with an additional bifurcation at posterior branch; small to moderate irregular or rounded dark blotches scattered over a brownish to gray background found on the anterior half of body, with alternate transverse dark and light bands mainly extending through posterior third of body length (Ref. 42925).

Facultative air-breathing in the genus (Ref. 126274)

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Campos-da-Paz, Ricardo | Collaborators

Campos-da-Paz, R., 2002. Gymnotus diamantinensis, a new species of electric knifefish from upper rio Arinos basin, Brazil (Ostariophysi: Gymnotidae). Ichthyol. Explor. Freshwat. 13(2):185-192. (Ref. 42925)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Data deficient (DD) ; Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet composition
Food consumption
Food rations
Predators

Ecology
Ecology

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

Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics

Distribution
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Introductions
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Anatomy
Gill area
Brain
Otolith

Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)

Genetics
Genetics
Heterozygosity
Heritability

Human related
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Stamps, coins, misc.

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Internet sources

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=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.2 ±0.4 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

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

Gymnotus diamantinensis Campos-da-Paz, 2002