|Scientific Name:||Gephyromantis tandroka (Glaw & Vences, 2001)|
Mantidactylus tandroka Glaw & Vences, 2001
|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.|
|Red List Category & Criteria:||Vulnerable B1ab(iii) ver 3.1|
|Assessor(s):||IUCN SSC Amphibian Specialist Group|
|Contributor(s):||Raxworthy, C.J., Andreone, F. & Glaw, F.|
|Facilitator/Compiler(s):||Luedtke, J. & Hobin, L.|
Listed as Vulnerable because its extent of occurrence (EOO) is 9,749 km2, it is known from fewer than 10 threat-defined locations, and there is ongoing decline in the extent and quality of habitat in northeastern Madagascar.
|Previously published Red List assessments:|
|Range Description:||This species is known with certainty only from the Marojejy Massif at 700-1,400m asl in north-eastern Madagascar. Specimens recorded from Tsaratanana between 1,620-2,000m asl (Raxworthy et al., 2008) and Sorata (F. Glaw unpubl. data November 2015) have also been included in the distribution for this assessment. Its extent of occurrence (EOO) is 9,749 km2.|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||It is an abundant species however, due to ongoing decline in the extent and quality of habitat, its population is suspected to be decreasing.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||It is usually observed near streams and tiny trickles of water in rainforest, where it can be found climbing on low vegetation, but it is not found in heavily degreaded habitat. Its breeding biology is unknown, and could be by either direct or larval development.|
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Movement patterns:||Not a Migrant|
|Use and Trade:||There are no records of this species being utilized.|
Its forest habitat is receding due to subsistence agriculture (including livestock grazing), timber extraction, charcoal manufacture, the spread of invasive eucalyptus, and expanding human settlements. Pressure from these threats are high on the Sorata Massif (F. Glaw pers. comm. November 2015).
Intensive illegal wood extraction of rosewood species within Marojejy National Park that followed the 2009 political crisis of Madagascar caused concerns for the survival of rainforest–restricted species, such as this one. However, while illegal rosewood logging has probably ceased, wood extraction currently taking place in the Park seems to occur at lower elevations and is not thought to have reached elevations where this species has been recorded; along the boundaries of Marojejy deforestation is taking place to clear land for agriculture (F. Glaw pers. comm. November 2015).
Species in this genus have tested positive for Batrachochytrium dendrobatidis (Bd), however currently there have been no negative effects observed within amphibian populations in Madagascar suggesting the Bd strain has a low virulence level (Bletz et al., 2015).
|Citation:||IUCN SSC Amphibian Specialist Group. 2016. Gephyromantis tandroka. The IUCN Red List of Threatened Species 2016: e.T57525A84176876.Downloaded on 26 September 2018.|
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