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Calumma vencesi 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Reptilia Squamata Chamaeleonidae

Scientific Name: Calumma vencesi
Species Authority: Andreone, Mattioli, Jesu & Randrianirina, 2001
Common Name(s):
English Vences' Chameleon
Taxonomic Notes: Specimens resembling this species have been recorded from near Makira at approximately 50 m asl., but these require confirmation (F. Glaw pers. comm. January 2011).

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii) ver 3.1
Year Published: 2011
Date Assessed: 2011-01-26
Assessor(s): Jenkins, R.K.B., Andreone, F., Andriamazava, A., Anjeriniaina, M., Brady, L., Glaw, F., Griffiths, R.A., Rabibisoa, N., Rakotomalala, D., Randrianantoandro, J.C., Randrianiriana, J., Randrianizahana , H., Ratsoavina, F. & Robsomanitrandrasana, E.
Reviewer(s): Bowles, P. & Tolley, K.
Justification:
Listed as Endangered on the a basis that, although the range of this species species is not well understood, it is potentially as low as 591 km², in an area subject to a continuing decline in the area and quality of forest habitat due to logging and agriculture, and which probably represents a single location, and certainly fewer than five, defined by a shared risk from these processes.

Geographic Range [top]

Range Description:

This species has a restricted range in the northeast of Madagascar where it has been collected from three forests, Betaolana, Besariaka and Tsararano, to the northwest of the Andapa basin (Andreone et al. 2001). It has been recorded between 700 and 960 m elevation, but probably occurs between 600 and 1,000 m (Andreone et al. 2001).  It has not been recorded from Masoala (F. Andreone pers. comm. January 2011). The chameleon's estimated extent of occurrence is 591 km².

Countries occurrence:
Native:
Madagascar
Additional data:
Number of Locations:1
Lower elevation limit (metres):600
Upper elevation limit (metres):1000
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:

This chameleonis thought to be locally abundant, with one report of 10 individuals found per four hours of search effort (Andreone et al. 2001). Its intolerance of habitat degradation in an area of Madagascar where forests are subjected to heavy human use suggests the population is likely to be declining.

Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:

This species is believed to be restricted to intact lowland humid forest. It uses the understorey, 10-90 cm above the ground, for night roosts (Andreone et al. 2001). Its absence from degraded forest areas indicates that it is intolerant of habitat modification (Andreone et al. 2001)

Systems:Terrestrial

Use and Trade [top]

Use and Trade: There is no reported international trade in this species.

Threats [top]

Major Threat(s):

Habitat loss and degradation due to slash-and-burn agriculture and logging (especially of rosewood) represent threats to this chameleon, which requires intact forest for its persistence.

Conservation Actions [top]

Conservation Actions: This species is not recorded from any protected areas, although it may occur in the Makira new protected area. Research is needed to clarify the distributional extent of this species and the identity of specimens from Makira, and information is needed on population trends. Areas where this species is known to occur should be placed under conservation management to ensure the survival of this disturbance-sensitive chameleon.

Classifications [top]

1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
suitability:Suitable  major importance:Yes
1. Land/water protection -> 1.1. Site/area protection

In-Place Research, Monitoring and Planning
  Action Recovery plan:No
  Systematic monitoring scheme:No
In-Place Land/Water Protection and Management
  Conservation sites identified:Yes, over part of range
  Occur in at least one PA:No
  Area based regional management plan:No
In-Place Species Management
  Harvest management plan:No
  Successfully reintroduced or introduced beningly:No
  Subject to ex-situ conservation:No
In-Place Education
  Subject to recent education and awareness programmes:No
  Included in international legislation:Yes
  Subject to any international management/trade controls:Yes
2. Agriculture & aquaculture -> 2.1. Annual & perennial non-timber crops -> 2.1.1. Shifting agriculture
♦ timing:Ongoing ♦ scope:Minority (<50%) ♦ severity:Rapid Declines ⇒ Impact score:Medium Impact: 6 
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion

2. Agriculture & aquaculture -> 2.1. Annual & perennial non-timber crops -> 2.1.2. Small-holder farming
♦ timing:Ongoing ♦ scope:Minority (<50%) ♦ severity:Rapid Declines ⇒ Impact score:Medium Impact: 6 
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion

5. Biological resource use -> 5.3. Logging & wood harvesting -> 5.3.3. Unintentional effects: (subsistence/small scale) [harvest]
♦ timing:Ongoing ♦ scope:Unknown ♦ severity:Unknown ⇒ Impact score:Unknown 
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Research -> 1.1. Taxonomy
1. Research -> 1.2. Population size, distribution & trends

Bibliography [top]

Andreone, F., Mattioli, F., Jesu, R. and Randrianirina, J.E. 2001. Two new chameleons of the genus Calumma from north-east Madagascar, with observations on hemipenal morphology in the Calumma furcifer group (Reptilia, Squamata, Chamaeleonidae). Herpetological Journal 11: 53-68.

IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.2). Available at: http://www.iucnredlist.org. (Accessed: 10 November 2011).


Citation: Jenkins, R.K.B., Andreone, F., Andriamazava, A., Anjeriniaina, M., Brady, L., Glaw, F., Griffiths, R.A., Rabibisoa, N., Rakotomalala, D., Randrianantoandro, J.C., Randrianiriana, J., Randrianizahana , H., Ratsoavina, F. & Robsomanitrandrasana, E. 2011. Calumma vencesi. The IUCN Red List of Threatened Species 2011: e.T172879A6934410. . Downloaded on 09 December 2016.
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