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Overview

Comprehensive Description

Biology

A blind cave fish that recently evolved from the surface form Astyanax mexicanus. A length estimate for this species is 10 cm (Glenn Owens, pers.comm. 2009).
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Distribution

Mexico.
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North America: Mexico.
  • 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

Max. size

10.0 cm TL (male/unsexed; (Ref. ))
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Type Information

Paratype for Astyanax jordani
Catalog Number: USNM 132517
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): J. del Villar Alvarez
Year Collected: 1945
Locality: Mexico Cueva "El Pachon'," San Luis Potosi, San Luis Potosi, Mexico, North America
  • Paratype: Alvarez, J. 1946. Anales de la Escuela Nacional de Ciencias Biologicas, Mexico. 4 (no. 2-3): 278, figs. 16-23.
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Ecology

Habitat

Habitat and Ecology

Systems
  • Freshwater
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Environment

benthopelagic; non-migratory; freshwater; pH range: 6.0 - 7.8; dH range: 30
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Life History and Behavior

Life Cycle

Expels eggs in a more or less haphazard fashion, the substrate on which the species spawns must have crevices and pores into which the adhesive eggs can roll and be hidden so to prevent predation by its parents or other cave inhabitants.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Astyanax fasciatus mexicanus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
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Barcode data: Astyanax hubbsi

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


There are 5 barcode sequences available from BOLD and GenBank.  Below is a 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 and other sequences.

GCCTGAGCTGGGATGGTTGGGACTGCTTTA---AGCCTGTTAATTCGGGCAGAGCTCGGCCAACCGGGATCCCTTCTAGGAGAT---GACCAGGTATATAATGTTCTGGTAACTGCACATGCTTTCGTTATAATTTTCTTTATAGTTATACCCGTTATAATTGGAGGCTTTGGAAATTGACTAGTCCCACTTATA---ATTGGCGCCCCAGACATAGCCTTCCCTCGAATAAATAACATAAGTTTTTGACTTCTTCCACCATCTTTTCTTCTCCTTCTAGCATCCTCTGGGGTCGAGGCTGGGGCAGGAACAGGATGAACTGTATACCCCCCTCTTGCTGGCAACCTTGCACATGCAGGAGCTTCCGTTGACCTA---ACTATTTTCTCACTACATTTAGCTGGTGTCTCCTCAATTTTGGGGGCAATCAATTTTATTACAACTATTATTAATATAAAACCCCCAGCCATTTCGCAGTACCAGACACCCTTATTTGTCTGGGCTGTCTTAGTAACAGCTGTCCTCCTTCTTCTTTCACTCCCTGTCTTAGCAGCT---GGTATCACAATACTTCTTACAGATCGTAACCTTAATACCTCATTTTTTGACCCGGCGGGCGGTGGAGATCCCATCCTTTATCAACACCTCTTTTGATTCTTTGGCCACCCA
-- end --

Download FASTA File
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Statistics of barcoding coverage: Astyanax hubbsi

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 5
Specimens with Barcodes: 5
Species With Barcodes: 1
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Statistics of barcoding coverage: Astyanax jordani

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 6
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
VU
Vulnerable

Red List Criteria
A1ac+2c, B1+2c, D2

Version
2.3

Year Assessed
1996
  • Needs updating

Assessor/s
Contreras-Balderas, S. & Almada-Villela, P.

Reviewer/s

Contributor/s

History
  • 1994
    Rare
    (Groombridge 1994)
  • 1990
    Rare
    (IUCN 1990)
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Threats

Vulnerable (VU) (A1ac+2c, B1+2c, D2)
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest; aquarium: commercial
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Wikipedia

Astyanax jordani

Astyanax jordani is a freshwater fish of the characin family (family Characidae) of order Characiformes, native to Mexico.[2][3] It is called the cave tetra (which is also used for the A. mexicanus subspecies mentioned below), or by its local Spanish name sardina ciega.

A blind cave fish, A. jordani is recently evolved from the Mexican tetra (A. mexicanus). While it can be confused with the blind cave form of A. mexicanus, it evolved separately from the surface form, and is considered a different species.[2][3] (IUCN, however, treats it as a subspecies of A. mexicanus.)[4]

This characin is listed on the IUCN Red List as Vulnerable on the basis of shrinking population and an acutely restricted and diminishing habitat.[4] It is fairly resilient, however, having a population doubling time of 15 months.[2]

It reportedly has been introduced to the Philippines.[2]

Astyanax jordani was formerly classified as Anoptichthys jordani, the sole member of genus Anoptichthys, and was first described by Carl Hubbs and William T. Innes. Anoptichthys hubbsi and Anoptichthys antrobius are junior synonyms.[2]

While this fish is often called "blind cave fish", that term normally refers more specifically to the blind cave form of A. mexicanus.

References[edit]

  1. ^ Hubbs, C. L. and W. T. Innes. 1936. "The first know blind fish of the family Characidae: a new genus from Mexico"; Occ. Pap. Mus. Zoo. 342: 1-7. University of Michigan.
  2. ^ a b c d e Froese, Rainer and Pauly, Daniel, eds. (2006). "Astyanax jordani" in FishBase. March 2006 version.
  3. ^ a b "Astyanax jordani". Integrated Taxonomic Information System. Retrieved 1 July 2006. 
  4. ^ a b Contreras-Balderas, S., and P. Almada-Villela (1996). "Astyanax mexicanus ssp. jordani". 2006 IUCN Red List of Threatened Species. Retrieved 2006-07-01. 
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