Overview

Comprehensive Description

Gymnocorymbus ternetzi :

CI-FML 3826 , 2 ex., C&S, 33.7-35.6 mm, Paraguay , Alto Paraguay , Fortin Patria, Rio Negro .

  • Juan Marcos Mirande, Gastón Aguilera, María de las Mercedes Azpelicueta (2007): A new species of Astyanax (Characiformes: Characidae) from the endorheic Río Salí basin, Tucumán, northwestern Argentina. Zootaxa 1646, 31-39: 33-33, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:D83848ED-9E15-4C2C-A228-0288B2CAFBB9
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Biology

Occurs in the middle and upper water layers. Feeds on worms, small crustaceans and insects (Ref. 7020). Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 60 cm (Ref. 51150).
  • Lima, F.C.T., L.R. Malabarba, P.A. Buckup, J.F. Pezzi da Silva, R.P. Vari, A. Harold, R. Benine, O.T. Oyakawa, C.S. Pavanelli, N.A. Menezes, C.A.S. Lucena, M.C.S.L. Malabarba, Z.M.S. Lucena, R.E. Reis, F. Langeani, C. Moreira et al. … 2003 Genera Incertae Sedis in Characidae. p. 106-168. 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. 38376)   http://www.fishbase.org/references/FBRefSummary.php?id=38376&speccode=10622 External link.
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Distribution

National Distribution

United States

Origin: Exotic

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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Paraguay and Guaporé River basins: Argentina, Bolivia, Brazil and Colombia (introduced).
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South America: Paraguay and Guaporé River basins to Argentina (Ref. 9086).
  • Lima, F.C.T., L.R. Malabarba, P.A. Buckup, J.F. Pezzi da Silva, R.P. Vari, A. Harold, R. Benine, O.T. Oyakawa, C.S. Pavanelli, N.A. Menezes, C.A.S. Lucena, M.C.S.L. Malabarba, Z.M.S. Lucena, R.E. Reis, F. Langeani, C. Moreira et al. … 2003 Genera Incertae Sedis in Characidae. p. 106-168. 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. 38376)   http://www.fishbase.org/references/FBRefSummary.php?id=38376&speccode=10622 External link.
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Physical Description

Size

Maximum size: 60 mm ---
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Max. size

7.5 cm SL (male/unsexed; (Ref. 81048))
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Diagnostic Description

CI-FML 3826 , 2 ex., C&S, 33.7-35.6 mm, Paraguay , Alto Paraguay , Fortín Patria, Rio Negro .

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Juan Marcos Mirande

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Ecology

Habitat

Habitat Type: Marine

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Environment

pelagic; freshwater; pH range: 6.0 - 8.0; dH range: 5 - 19
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Migration

Non-Migrant: No. All populations of this species make significant seasonal migrations.

Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: No. No populations of this species make annual migrations of over 200 km.

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Trophic Strategy

Occurs in the middle and upper water layers. Feeds on worms, small crustaceans and insects.
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Diseases and Parasites

White spot Disease. Parasitic infestations (protozoa, worms, etc.)
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Fin-rot Disease (late stage). Bacterial diseases
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Fin Rot (early stage). Bacterial diseases
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Dactylogyrus Gill Flukes Disease. Parasitic infestations (protozoa, worms, etc.)
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Gymnocorymbus ternetzi

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There is 1 barcode sequence available from BOLD and GenBank.

Below is the sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.

See the BOLD taxonomy browser for more complete information about this specimen.

Other sequences that do not yet meet barcode criteria may also be available.

ACCCTTTATCTAGTATTTGGTGCCTGAGCCGGCATGGTTGGCACGGCTTTA---AGTCTCCTAATCCGGGCAGAACTTGGTCAGCCTGGCACTTTACTAGGTGAC---GACCAGGTATATAATGTACTGGTAACTGCACATGCCTTTGTAATAATTTTCTTTATAGTCATGCCCGTAATAATTGGAGGTTTTGGAAACTGGCTAGTTCCTTTAATA---ATTGGAGCCCCAGACATAGCCTTCCCTCGCATAAACAATATGAGCTTTTGACTCCTTCCCCCATCCTTCCTTCTTCTTTTAGCATCATCCGGAGTCGAAGCCGGAGCAGGGACCGGTTGAACTGTCTATCCCCCTCTTGCTGGAAATCTTGCCCACGCAGGAGCCTCCGTCGACCTA---ACTATTTTTTCACTTCACCTAGCCGGTGTATCTTCTATTTTAGGAGCAATTAACTTTATTACAACTATTATTAATATAAAACCCCCAGCTATTTCCCAATACCAGACACCCCTATTTGTCTGAGCCGTTCTCGTTACAGCCGTCCTTCTTCTACTCTCACTCCCAGTTTTAGCAGCT---GGCATCACCATGCTTCTAACAGACCGTAACCTCAACACTTCATTCTTTGATCCTGCTGGGGGAGGTGACCCAATTCTTTATCAACATCTA
-- end --

Download FASTA File

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Statistics of barcoding coverage: Gymnocorymbus ternetzi

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 6
Specimens with Barcodes: 13
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNA - Not Applicable

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NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

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Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

aquarium: highly commercial
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Wikipedia

Black tetra

The black tetra (Gymnocorymbus ternetzi) also known as the black skirt tetra, petticoat tetra, high-fin black skirt tetra, and black widow tetra, is a freshwater fish of the characin family (Characidae). It is native to the Paraguay and Guaporé River basins of southern Brazil, Argentina, and Bolivia.

Growing to about 6 cm (2.5 in) total length, the black tetra has a roughly tetragonal body shape and is greyish in colour, fading from near black at the tail to light at the nose. Two prominent, black, vertical bars appear just posterior to the gills. It is a schooling fish, and requires at least six in a group.

The black widow tetra feeds on small crustaceans, insects, and worms.

In the aquarium[edit]

Group of tetras in a home aquarium

The black skirt tetra is a common fish that is widely available for purchase.

Hobbyists often provide live foods such as daphnia and mosquito larvae, and frozen foods like bloodworms.[citation needed]

In a home aquarium

The species reaches sexual maturity at about two years of age. Like most characins, this species spawns by intermittently releasing and fertilizing eggs among plants. It frequently eats its own eggs, so keepers remove the fish after spawning.

Similar names[edit]

The black phantom tetra (Hyphessobrycon megalopterus) is a separate species. The black neon tetra (Hyphessobrycon herbertaxelrodi) is sometimes also called the black tetras.

Genetic modification[edit]

GloFish black tetras in shades of bright green, orange, purple, and pink are available.

See also[edit]

References[edit]

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