|Scientific Name:||Heleophryne rosei|
|Species Authority:||Hewitt, 1925|
|Red List Category & Criteria:||Critically Endangered B1ab(ii,iii)+2ab(ii,iii) ver 3.1|
|Assessor(s):||South African Frog Re-assessment Group (SA-FRoG), IUCN SSC Amphibian Specialist Group|
|Reviewer(s):||Angulo, A. & Cox, N.A.|
|Contributor(s):||Channing, A., Turner, A.A., de Villiers, A., Harvey, J., Tarrant, J., Measey, J., Tolley, K., Minter, L., du Preez, L., Burger, M., Cunningham, M. & Davies, S.|
Listed as Critically Endangered because its Extent of Occurrence and Area of Occupancy is less than 9 km2, all individuals are in a single location, and there is a continuing decline in the quality of its habitat.
|Previously published Red List assessments:||
|Range Description:||This species has a very restricted range (Extent of Occurrence: 9 km2) being endemic to the southern and eastern slopes of Table Mountain, in the Western Cape province, extreme south-western South Africa. Within this, the Area of Occupancy (around 4.5 km2) is believed to be suffering ongoing decline. It occurs between 240 and 1,060 m asl.|
Native:South Africa (Western Cape)
|Estimated area of occupancy (AOO) - km2:||4.5|
|Continuing decline in area of occupancy (AOO):||Yes|
|Estimated extent of occurrence (EOO) - km2:||9|
|Continuing decline in extent of occurrence (EOO):||No|
|Number of Locations:||1|
|Lower elevation limit (metres):||240|
|Upper elevation limit (metres):||1060|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||It is a rare and elusive species that survives in low population densities. The number of tadpoles in the Skeleton Gorge decreased by around 50% from 1980 to 2000, but monitoring of tadpoles suggest that this subpopulation is stable.|
|Current Population Trend:||Stable|
|Habitat and Ecology:||It lives in forest and fynbos heathland, breeding in clear perennial streams in gorges, valleys and ravines on Table Mountain. Non-breeding adults have been found in damp, sheltered habitat well away from streams, including in caves. The tadpoles require longer than 12 months to complete metamorphosis, and so it is important that there is perennial water to allow the larvae to develop. The habitat on some of these streams is deteriorating due to abstraction and soil erosion.|
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Use and Trade:||
There are no reports of this species being utilized.
|Major Threat(s):||The main threats are the spread of alien vegetation, frequent fires, and water storage reservoirs on the mountain which can affect the consistency of stream-flow. Intensification of tourism is also a threat through soil erosion around some of the streams. Water abstraction from streams has resulted in habitat loss and may limit the vertical movement of tadpoles in summer.|
|Conservation Actions:||The whole of this species' range is incorporated in the Table Mountain National Park, part of the Cape Floristic Region World Heritage Site, and Kirstenbosch Botanic Gardens. High priorities for conservation research were set to determine the dispersal of this species and the highest priority to estimate population size. Perceived threats need to be evaluated and management plans need to be properly implemented and integrated between properties. Current monitoring of tadpoles could be expanded to make population estimates.|
Baard, E.H.W. 1989. The status of some rare and endangered endemic reptiles and amphibians of the southwestern Cape Province, South Africa. Biological Conservation: 161-168.
Boycott, R.C. and de Villiers, A.L. 1986. The status of Heleophryne rosei Hewitt (Anura: Leptodactylidae) on Table Mountain and recommendations for its conservation. South African Journal of Wildlife Research: 129-134.
Channing, A. 2001. Amphibians of Central and Southern Africa. Cornell University Press, Ithaca and London.
De Villiers, A.L. 1997. Monitoring the distribution and conservation status of threatened amphibians in the southwestern Cape. Proceedings of the Third H.A.A. Symposium on African Herpetology, 1993, Pretoria, pp. 142-148. Herpetological Association of Africa, Stellenbosch, South Africa.
du Preez, L. and Carruthers, V. 2009. A complete guide to the frogs of southern Africa. Struik Nature, Cape Town.
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
McLachlan, A. 1978. South African Red Data Book - Reptiles and Amphibians. South African National Scientific Programmes Report.
Minter, L.R., Burger, M., Harrison, J.A., Braack, H.H., Bishop, P.J. and Knoepfer, D. 2004. Atlas and Red Data Book of the Frogs of South Africa, Lesotho and Swaziland. SI/MAB Series No. 9, Washington, D.C.
Passmore, N.I. and Carruthers, V.C. 1995. South African Frogs, 2nd Edition. Southern Book Publishers and Witwatersrand University Press, Johannesburg.
|Citation:||South African Frog Re-assessment Group (SA-FRoG), IUCN SSC Amphibian Specialist Group. 2010. Heleophryne rosei. The IUCN Red List of Threatened Species 2010: e.T9773A13015448. . Downloaded on 02 December 2015.|
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