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Orania ravaka 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Arecales Palmae

Scientific Name: Orania ravaka Beentje

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii)+2ab(iii); D1 ver 3.1
Year Published: 2012
Date Assessed: 2010-12-17
Assessor(s): Rakotoarinivo, M. & Dransfield, J.
Reviewer(s): Baker, W.J., Beentje, H.J. & Bachman, S.
Justification:
Palm endemic to the area around the Bay of Antongil with an extent of occurrence of 893 km² and an area of occupancy of 220 km². The population is mostly protected but in a few places where there is no protection the habitat is disturbed or even destroyed by agricultural and logging activities, hence there is continuing decline in the extent and quality of the habitat. The species is known from six locations and the population is not considered to be severely fragmented. The population size of this palm is estimated to comprise about 800 mature individuals. This species qualifies for listing as Vulnerable.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Endemic to the Bay of Antongil region in northeast Madagascar.
Countries occurrence:
Native:
Madagascar
Additional data:
Estimated area of occupancy (AOO) - km2:220
Number of Locations:6
Lower elevation limit (metres):100
Upper elevation limit (metres):900
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Often locally abundant; about 800 individuals are estimated for the population size of this species. The population trend at present is not known.
Current Population Trend:Unknown
Additional data:
Number of mature individuals:800
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Occurs in lowland rain forest; grows on ridge crests and in valley bottoms at altitudes between 100 and 900 m.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: There is no information on use of this species.

Threats [top]

Major Threat(s): The main threat to this species is habitat loss through clearance for shifting agriculture and logging.

Conservation Actions [top]

Conservation Actions: Protected in Masoala, Makira and Mananara Avaratra.

Citation: Rakotoarinivo, M. & Dransfield, J. 2012. Orania ravaka. The IUCN Red List of Threatened Species 2012: e.T38623A2881235. . Downloaded on 20 September 2017.
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