Overview

Distribution

Range Description

This species is distributed from the Atlantic slope of southern Mexico; Rio Coatzacoalcos eastward into the Rio Usumacinta basin, and into northern Guatemala (Miller 2005).
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Atlantic Mexico and Guatemala.
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Central America: Atlantic slope of southern Mexico and northern Guatemala.
  • Deckert, G.D. and D.W. Greenfield 1987 A review of the western Atlantic species of the genera Diapterus and Eugerres (Pisces: Gerreidae). Copeia 1987(1):182-194. (Ref. 33568)
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Physical Description

Morphology

Dorsal spines (total): 9; Dorsal soft rays (total): 10; Analspines: 3; Analsoft rays: 8
  • Deckert, G.D. and D.W. Greenfield 1987 A review of the western Atlantic species of the genera Diapterus and Eugerres (Pisces: Gerreidae). Copeia 1987(1):182-194. (Ref. 33568)
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Size

Max. size

21.6 cm SL (male/unsexed; (Ref. 33568))
  • Deckert, G.D. and D.W. Greenfield 1987 A review of the western Atlantic species of the genera Diapterus and Eugerres (Pisces: Gerreidae). Copeia 1987(1):182-194. (Ref. 33568)
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
E. mexicanus is a demersal species that inhabits arroyos and rivers of moderate to slight currents that are fairly clear to turbid. Generally no vegetation, or green algae present, with substrates of sand, silt, clay, mud and gravel (Miller 2005).

Systems
  • Freshwater
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Environment

pelagic; freshwater
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Eugerres mexicanus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 9
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2009

Assessor/s
Snoeks, J., Laleye, P. & Contreras-MacBeath, T.

Reviewer/s
Collen, B., Darwall, W., Ram, M. & Smith, K. (SRLI Freshwater Fish Evaluation Workshop)

Contributor/s

Justification
Assessed as Least Concern due to the species' fairly wide distribution, ability to occupy a range of habitats, and lack of evidence of any population declines. However, the Usumacinta basin faces a number of threats, which may give cause for concern in the future.
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Population

Population
The population appears to be currently stable, although detailed information is unknown.

Population Trend
Stable
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Threats

Major Threats
The ecological and hydrological integrity of the Rio Usumacinta basin, which is 106,000 km², faces numerous threats from deforestation, hydroelectric development and mineral exploitation (Hamann and Ankersen 2006).
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Least Concern (LC)
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Management

Conservation Actions

Conservation Actions
There are no conservation actions in place.
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