|Scientific Name:||Gephyromantis webbi (Grandison, 1953)|
Mantidactylus webbi (Grandison, 1953)
Rhacophorus webbi Grandison, 1953
|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:||Endangered B1ab(iii) ver 3.1|
|Assessor(s):||IUCN SSC Amphibian Specialist Group|
|Contributor(s):||Andreone, F., Glaw, F., Scherz, D. & Vences, M.|
|Facilitator/Compiler(s):||Sharp, D., Luedtke, J. & Hobin, L.|
Listed as Endangered because its extent of occurrence is 4,768 km2, it is known from fewer than five threat-defined locations, and there is continuing decline in the extent and quality of its habitat in northeastern Madagascar.
|Previously published Red List assessments:|
|Range Description:||This species occurs around the Antongil Bay down to Antanambe and on the island of Nosy Mangabe in northeastern Madagascar, between 0-160 m asl (Gehring et al. 2010). It occurs in fewer than five threat-defined locations, and its extent of occurrence (EOO) is 4,768 km2.|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||It is locally common. However due to ongoing declines in the extent and quality of the habitat, the population is suspected to be decreasing.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||It inhabits very low altitude rainforest, living along rocky streams among boulders and moss, and is intolerant of disturbed habitat. It breeds along streams under mossy boulders and eggs are laid on rocks.|
|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.|
The major threat is habitat loss due to subsistence agriculture, timber extraction, and expanding human settlements. Forest loss is particularly severe on the coast of Madagascar.
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).
It occurs in Nosy Mangabe Special Reserve, but is not yet confirmed from Masoala National Park.
|Citation:||IUCN SSC Amphibian Specialist Group. 2016. Gephyromantis webbi. The IUCN Red List of Threatened Species 2016: e.T57532A84177562.Downloaded on 20 September 2017.|
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