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Vieja hartwegi

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII PERCIFORMES CICHLIDAE

Scientific Name: Vieja hartwegi
Species Authority: (Taylor & Miller, 1980)
Common Name/s:
English Tailbar Cichlid
Spanish Mojarra del Rio Grande de Chiapa
Synonym/s:
Cichlasoma hartwegi Taylor & Miller, 1980

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2ce; B1ab(ii,iii) ver 3.1
Year Published: 2009
Date Assessed: 2007-03-01
Assessor/s: Snoeks, J., Laleye, P. & Contreras-MacBeath, T.
Reviewer/s: Collen, B., Darwall, W., Ram, M. & Smith, K. (SRLI Freshwater Fish Evaluation Workshop)
Justification:
This species has been assessed as Vulnerable. It is declining at a rate likely not more than 50% (as occupied areas probably not reduced by half) but more than 30% due to reduction in range and habitat quality, as well as the effects of introduced fish. Its distribution covers an area less than 20,000 km² which is severely fragmented, and still in decline.

Geographic Range [top]

Range Description: This restricted species is found in Mexico; in the basin of upper Rio Grijalva (Rio Grande de Chiapas), Chiapas. This river is severely fragmented because of damming.
Countries:
Native:
Mexico (Chiapas)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Was previously a common species.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: V. hartwegi is a benthopelagic species that inhabits flowing streams and rivers as well as lakes, over rocks, sand, silt or mud. Vegetation is usually sparse, or absent. Young and juveniles congregate in backwaters (Miller 2005).
Systems: Freshwater

Threats [top]

Major Threat(s): A series of dams have been built within the distribution of this species in the last 10 years. Apart from the dramatic habitat alteration caused by this (replacing rivers - the habitat of this species - with lakes, that are unsuitable for this species) and the resultant severe fragmentation of populations, it has drawn humans to the area and also increased pollution into the river system. Tilapia has also been present in the lakes since the 1970s or maybe early 1980s (though it does not do as well in the small rivers, where this species may more frequently be found).

Conservation Actions [top]

Conservation Actions: SEDESO (Secretaría de Desarrollo Social) listed the species as rare (Miller 2005).
Citation: Snoeks, J., Laleye, P. & Contreras-MacBeath, T. 2009. Vieja hartwegi. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 23 April 2014.
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