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Xenopus longipes

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA AMPHIBIA ANURA PIPIDAE

Scientific Name: Xenopus longipes
Species Authority: Loumont & Kobel, 1991
Common Name/s:
English Lake Oku Clawed Frog
Taxonomic Notes: Uniquely among vertebrates (except Xenopus ruwenzoriensis), this is a dodecaploid species, and it is therefore of considerable conservation interest. It was probably formed by both hybridization and polyploidization (Loumont and Kobel 1991).

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(v)+2ab(v) ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Assessor/s: Richard Tinsley, John Measey
Reviewer/s: Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson and Neil Cox)
Justification:
Listed as Critically Endangered because its Extent of Occurrence is less than 100 km2 and its Area Of Occupancy is less than 10km2, all individuals are in a single location, and there is a projected decline in the number of mature individuals, due to the high likelihood of a fish introduction into Lake Oku.

Geographic Range [top]

Range Description: This species is endemic to Lake Oku at 2,200m asl on Mount Oku, western Cameroon. It might occur elsewhere in the Cameroon highlands, but there are few lakes with ecological characteristics similar to Lake Oku.
Countries:
Native:
Cameroon
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: It is abundant in Lake Oku.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: Lake Oku is a shallow, eutrophic lake completely surrounded by montane rainforest. This species is entirely water-dependent, quite inept on land, and is the main aquatic vertebrate in the lake, filling the ecological niche of a fish.
Systems: Freshwater

Threats [top]

Major Threat(s): The main threat to this species would appear to be the risk of introduction of a predatory fish species into Lake Oku, which could wipe out this restricted-range species. Such a scenario is highly plausible given the high protein demands of surrounding communities.

Conservation Actions [top]

Conservation Actions: A conservation project has been conducted on Mount Oku for several years by BirdLife International, involving community management of the area involving the local villages. This project needs to take into account the conservation needs of this species. A captive-breeding programme should be considered in view of the risk of a catastrophic collapse of the population if a predatory fish species is introduced to the lake.
Citation: Richard Tinsley, John Measey 2004. Xenopus longipes. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 20 April 2014.
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