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Telmatobius truebae 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Telmatobiidae

Scientific Name: Telmatobius truebae Wiens, 1993
Common Name(s):
English Trueb's Water Frog
Taxonomic Source(s): Frost, D.R. 2015. Amphibian Species of the World: an Online Reference. Version 6.0. New York, USA. Available at: http://research.amnh.org/herpetology/amphibia/index.html.

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii,v) ver 3.1
Year Published: 2017
Date Assessed: 2017-04-21
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Neam, K.
Contributor(s): Catenazzi, A., Angulo, A., Aguilar Puntriano, A., Neira, D., Lehr, E., Icochea M., J., Martinez, J.L. & Sinsch, U.
Facilitator/Compiler(s): Angulo, A., Luedtke, J., Neam, K.
Justification:
Listed as Vulnerable because it has an extent of occurrence estimated (EOO) to be 4,362 km2, it is known from seven threat-defined locations, and there is a continuing decline in the extent and quality of its habitat and in the number of mature individuals in the northern Andes of Peru.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is currently known from the Cordillera Oriental of northern Peru, in the Regions of Cajamarca, Amazonas and San Martín, at 2,150–3,600 m asl. Its distribution is poorly known and it is likely to occur more widely. It is known from at least 10 sites combined into seven locations, and its EOO is approximately 4,362 km2.
Countries occurrence:
Native:
Peru
Additional data:
Number of Locations:7
Lower elevation limit (metres):2150
Upper elevation limit (metres):3600
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population is suspected to be decreasing due to ongoing decline in the quality and extent of its habitat. The type series consists of 45 specimens and a tadpole series, all collected in March 1979, suggesting that the species was at least locally abundant at the type locality. A second survey at the type locality, in January–February 1989, revealed a total of 16 specimens collected in the course of three days. A third visit to the type locality, in 2005, did not render any individuals (C. Aguilar pers. comm. January 2011), so there appears to have been a decline at least at the type locality. Surveys in November 2003 at Lake Quintecocha and March 2005 in the vicinities of Leimebamba, Amazonas (where only tadpoles were collected), suggested that the species was common at these localities (C. Aguilar pers. comm. January 2011).
Current Population Trend:Decreasing
Additional data:
Continuing decline of mature individuals:Yes
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species inhabits very humid montane forest and subalpine páramo (puna) (Wiens 1993). It is a riparian, semi-aquatic, stream-breeding frog, typically found under rocks, in or along streams and drainage ditches (Wiens 1993). Around Lake Quintecocha, individuals were found only at night along the shore of the swampy vegetation of the lake and surrounding wetlands. Tadpoles have been found in pools in streams from January–March (Wiens 1993), suggesting that this is when breeding takes place.
Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:Yes
Movement patterns:Not a Migrant

Use and Trade [top]

Use and Trade:

Aquatic species from this genus are known to be harvested in large numbers for human consumption and medicinal uses, and often sold at local markets (Lehr 2005).

Threats [top]

Major Threat(s): This species is threatened by habitat loss resulting from grazing for cattle and agricultural expansion. A survey in Lake Pomacochas in 2002 revealed that the site suffers from severe habitat loss and degradation, as forests are being replaced with pastures (A. Catenazzi pers. comm. January 2011). The northern shore of Pomacochas appears to be severely affected by fires. Some small-holder farming occurs in Leimebamba, but the impact of this activity here is considered to be minor (C. Aguilar pers. comm. January 2011). Similar to its congeners, this species is likely to be very susceptible to chytridiomycosis caused by Batrachochytrium dendrobatidis. The pathogen has yet to be reported from this species; however there are several reports of infections in congeners in southern Peru (e.g., Seimon et al. 2005, Catenazzi et al. 2011), and chytridiomycosis has been implicated as one of the causes of the disappearance of Telmatobius niger in Ecuador.

Conservation Actions [top]

Conservation Actions: Conservation Actions In Place
It potentially occurs in Los Chilchos and Tilacancha Private Conservation Areas. It is listed as Endangered (EN) in Peru and has legal protection provided by the Categorization in Endangered Species of Wild Fauna (Decreto Supremo Nº004-2014-MINAGRI), which bans all hunting, capture, possession, transport or export of the species for commercial purposes. 

Conservation Needed
Protection of its habitat in the Pomacochas area is urgently needed. 

Research Needed
Population monitoring is needed to determine the overall population trend of this species, as is more survey work to better understand this species' distribution and natural history. Screening for chytrid may also be needed given that this fungus has been found in other congeners.

Citation: IUCN SSC Amphibian Specialist Group. 2017. Telmatobius truebae. The IUCN Red List of Threatened Species 2017: e.T57365A3060175. . Downloaded on 22 February 2018.
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