Orestias pentlandii 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Cyprinodontiformes Cyprinodontidae

Scientific Name: Orestias pentlandii Valenciennes, 1846
Orestias bairdii Cope, 1876
Orestias pentlandii Valenciennes, 1846
Orestias pentlandii fuscus Garman, 1895

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii,v); D2 ver 3.1
Year Published: 2009
Date Assessed: 2007-03-01
Assessor(s): Reis, R & Lima, F.
Reviewer(s): Collen, B., Darwall, W., Ram, M. & Smith, K. (SRLI Freshwater Fish Evaluation Workshop)
All Lake Titicaca species are threatened by introduced species (Rainbow Trout) and pollution which are not likely to cease or reduce in the near future. Orestias pentlandii has not been found outside this lake, and is therefore assessed as Vulnerable.

Geographic Range [top]

Range Description:This species is known only from Lake Titicaca which has an area of 8,270.6 km2.
Countries occurrence:
Additional data:
Number of Locations:1
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The global population is decreasing, although detailed information is not yet available.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Orestias pentlandii is a benthopelagic (ecological region at the lowest level of water body) species within the lake.

Use and Trade [top]

Use and Trade: This species is highly valued commercially for its quality and size, and is caught in areas of medium depth with a type of trawl net called a “bolsa” (FAO 2003).

Threats [top]

Major Threat(s): Orestias pentlandii in Lake Titicaca has been considerably reduced in abundance since the introduction of the Rainbow Trout (Oncorhynchus mykiss). However, the contribution of introduced species to this decline is obscured by recent overfishing and other bad management practices (Kerr and Lasenby 2000). The threat posed by introduced species is shown by the disappearance of Orestias cuvieri from Lake Titicaca. Both Odontesthes bonariensis (Pejerrey) and O. mykiss were implicated in its decline. Lake Titicaca is also being degraded because of pollution.

Conservation Actions [top]

Conservation Actions: There are no conservation measures in place although the restoration and maintenance of the species preferred habitat is needed to see what effect the invasive species and water pollution is having. A monitoring programme should also be implemented to follow the trends of this threatened species.

Citation: Reis, R & Lima, F. 2009. Orestias pentlandii. The IUCN Red List of Threatened Species 2009: e.T167692A6368531. . Downloaded on 19 April 2018.
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