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Mantella manery 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Mantellidae

Scientific Name: Mantella manery Vences, Glaw & Böhme, 1999
Common Name(s):
English Marojejy Mantella, Marojezy Mountain Mantella
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) ver 3.1
Year Published: 2017
Date Assessed: 2017-01-03
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Luedtke, J.
Contributor(s): Raxworthy, C.J., Glaw, F., Scherz, M.D., Vences, M., Cox, N.A. & Rabibisoa, N.
Facilitator/Compiler(s): Hobin, L.
Justification:
Listed as Vulnerable because while it remains poorly known, its extent of occurrence (EOO) is presumed to be 7,705 km2, it is known from two threat-defined locations, and there is believed to be a continuing decline in the extent and quality of its habitat in northern Madagascar.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species was previously only known from northwestern and northeastern Madagascar, with records from Marojejy at 300 m Asl and Est Betaidambo in the Analabe Rainforest along Ramena River (west of Tsaratanana Strict Nature Reserve) at 700 m Asl. It has now also been recorded further north from and around the village of Ankazafa, west of Dariana in northeast Madagascar (Edmonds 2009). The species could occur between known sites, but the EOO of its current mapped range is 7,705 km2, and the range is estimated to represent two threat-defined locations.
Countries occurrence:
Native:
Madagascar
Additional data:
Number of Locations:2
Lower elevation limit (metres):300
Upper elevation limit (metres):700
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It was described in 1999, based on a single specimen in the collections of the Zoological Institute of the University of Antananarivo. The original description was based on a colour slide, but the holotype has since been found and redescriptions have been published (Vences et al. 2004). The paucity of records suggests that it is rare or cryptic. At the type locality, this species was reported in low densities but it was abundant during the survey at and near Ankazafa (Edmonds 2009). This species and Mantella ebenaui have also been found in very close proximity in Ankazafa and have potentially hybridized, although this needs to verified (Edmonds 2009). Due to ongoing decline in the extent and quality of 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 is a species of low and mid altitude rainforest. It is terrestrial, and 4–5 individuals have been found in a stony brook. Large groups of males have been observed calling near the base of boulders in gallery forest, following a rainstorm (Edmonds 2009). Its breeding habits are unknown, but it is likely to reproduce like other species of the genus, with the eggs being laid on the ground, and the larvae developing in water.
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): Its forest habitat is likely to be receding due to subsistence agriculture, timber extraction, charcoal manufacture, invasive spread of eucalyptus, livestock grazing and expanding human settlements. Andreone et al. (2008) record that there is a continuing decline in the extent and quality of its assumed habitat in northern Madagascar. 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 along the boundaries of Marojejy deforestation is taking place to clear land for agriculture (F. Glaw pers. comm. November 2015). The area in Ankazafa, where the potential hybrids of this species and Mantella ebenaui occur, is unprotected and is under threat from zebu grazing and agriculture (Edmonds 2009).

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
This species occurs in Marojejy National Park and Tsaratanana Strict Nature Reserve. The second site at the Analabe Rainforest is not protected, but is currently remote from logging activities (N.H.C. Rabibisoa pers. comm.). It is listed on CITES Appendix II.

Conservation Needed
Improved protection and management of forests throughout the region is required, including within the boundaries of protected areas.

Research Needed
Further research is essential to fully understand the distribution, origin, type and virulence of Bd lineages found in Madagascar (Bletz et al. 2015). Genetic studies should also be carried out on all Mantellas in the Ankazafa area to determine taxonomic identity (Edmonds 2009).

Citation: IUCN SSC Amphibian Specialist Group. 2017. Mantella manery. The IUCN Red List of Threatened Species 2017: e.T57447A84167433. . Downloaded on 18 December 2017.
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