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Gephyromantis azzurrae 

Scope:Global
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Mantellidae

Scientific Name: Gephyromantis azzurrae
Species Authority: Mercurio & Andreone, 2007
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.
Taxonomic Notes: This species is similar to and can be confused with sympatrically occurring Gephyromantis corvus from which it can be distinguished from its advertisment calls (Mercurio and Andreone 2007).

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2016
Date Assessed: 2015-11-27
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Stuart, S.N.
Contributor(s): Andreone, F., Glaw, F., Scherz, D. & Vences, M.
Facilitator/Compiler(s): Luedtke, J. & Hobin, L.
Justification:
Listed as Endangered because its extent of occurrence is 992 km², all individuals are in two threat-defined locations and there is continuing decline in the extent and quality of its habitat.
Previously published Red List assessments:
  • 2009 – Endangered (EN)
  • 2008 – Endangered (EN)

Geographic Range [top]

Range Description:This species is currently known from only three localities (Andriamanero, Iamabahatsy and Sakamalio) in the northern part of the Isalo Massif, between 640-689m asl (Mercurio and Andreone, 2007), but it might occur a little more widely on the Massif. It is inferred that the potential distribution includes the forest habitats along streams in the Isalo area, both within and outside the protected areas boundaries (Andreone et al., 2008; Mercurio et al., 2008), but for the purposes of this assessment it has been mapped to the boundaries of Isalo National Park. Its extent of occurrence is 992 km2 and its area of occurrece (AOO) is believed to be less than 500 km2.
Countries occurrence:
Native:
Madagascar
Additional data:
Estimated area of occupancy (AOO) - km2:1-499
Number of Locations:2
Lower elevation limit (metres):640
Upper elevation limit (metres):689
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There is little information known about the population of this species. However due to ongoing declines in the extent and quality of the habitat, the population is suspected to be decreasing.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species has been found in the river beds of large canyons with running water and in gallery forest habitat calling 10-20m from each other about 50-150 cm above the ground (Mercurio and Andreone, 2007). Tadpoles live in streams, are carnivorous and macrophagous, and prefer habitats characterized by comparatively low temperatures, shallow water depth, and a relatively fast current (Reeve et al., 2011).
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:

There are no records of this species being utilized.

Threats [top]

Major Threat(s): Of the known localities, Andriamanero is only just outside the boundaries of the Isalo National Park. Threats affecting this area include the extensive prairie burning leading to the loss of gallery forest, and habitat alteration due to the excavation of mines for sapphires - an activity that has a great potential for long-term persistence and is thus seriously threatening the Isalo biodiversity (Duffy, 2006).

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).

Conservation Actions [top]

Conservation Actions: Conservation Actions
Two of the known localities, Iamabahatsy and Sakamalio, are within the Isalo National Park. 

Conservation Needed
Outside this protected area conservation measures are needed to protected the species' habitat from the effects of fires and mining.

Research Needed

Further research is required to clarify the species' distribution, population size and trends, and is essential to fully understand the distribution, origin, type and virulence of Bd lineages found in Madagascar (Bletz et al., 2015).


Citation: IUCN SSC Amphibian Specialist Group. 2016. Gephyromantis azzurrae. The IUCN Red List of Threatened Species 2016: e.T136160A49562890. . Downloaded on 27 July 2016.
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