AMPHIBIAWEB
Colostethus dunni
family: Dendrobatidae
subfamily: Colostethinae
Conservation Status (definitions)
IUCN (Red List) Status Critically Endangered (CR)
CITES
Other International Status None
National Status None
Regional Status None

Country distribution from AmphibiaWeb's database: Venezuela

 

View distribution map using BerkeleyMapper.

   

From the IUCN Red List Species Account:

 

Range Description

This species is known from the central part of the Venezuelan Coastal Range, in the vicinity of Caracas, from around 800 to at least 1,520m asl. Its presence has been suggested, but not confirmed, in Quebrada de Caurimare, Miranda State, also in the vicinity of Caracas.

Habitat and Ecology

It inhabits seasonal montane forests. Its breeding habits are unknown, although the larvae are likely to develop in water, like other species of the genus.

Population

This species was once considered one of the more common species of the Caracas Valley; however, comprehensive surveys in 1992-1993 and, more recently, in 2004 have failed to find any populations in these areas. It is not known when exactly the decline began, but the decline of Atelopus cruciger, another formerly common frog from the same region, has been documented. It is possible that P. dunni has experienced a similar decline. There are no known extant populations in the wild at present, even in suitable habitat.

Population Trend

decreasing

Major Threats

The major threats to the species include habitat loss due to urban development and fires, and pollution. The cause(s) of the recent dramatic decline have not been established, but it is characteristic of declines seen in other species impacted by chytridiomycosis.

Conservation Actions

Some populations might be protected in Parque Nacional El Avila, near Caracas. Research into the cause(s) of the population decline is urgently needed, as are surveys to determine the current status of populations.

Red List Status

Critically Endangered (CR)

Rationale

Listed as Critically Endangered because of a drastic population decline, estimated to be more than 80% over the last ten years, inferred from the apparent disappearance of most of the population, probably due to chytridiomycosis.

Citation

Enrique La Marca, Jesús Manzanilla, Celsa Señaris 2006. Prostherapis dunni. The IUCN Red List of Threatened Species 2006: e.T55072A11248293. http://dx.doi.org/10.2305/IUCN.UK.2006.RLTS.T55072A11248293.en .Downloaded on 17 November 2018

 

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