Tarsius lariang 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Primates Tarsiidae

Scientific Name: Tarsius lariang Merker & Groves, 2006
Common Name(s):
English Lariang Tarsier
Taxonomic Notes: This taxon was recently described by Merker and Groves (2006).

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Shekelle, M., Merker, S. & Salim, A.
Reviewer(s): Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)
Listed as Data Deficient as this is a newly described species, thus there is not sufficient information to assess it at this time. There do seem to be some threats operating, even though a portion of its extent of occurrence is within a protected area. Further information is needed on distribution and ecology prior to further assessment.

Geographic Range [top]

Range Description:This species is found in western central Sulawesi (Indonesia) in the Lariang River basin near the confluence with its tributary, the Meweh River, and extends as far north as Gimpu. The precise limits of its distribution have yet to be precisely determined, though the eastern boundary is known to be parapatric with that of T. dentatus. Its distribution is likely to be much larger than what is confirmed at present.
Countries occurrence:
Additional data:
Upper elevation limit (metres):1100
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Very little is known of the population of this species. Preliminary studies suggest that its population densities and home range sizes are similar to those of Tarsius dentatus (S. Merker unpubl. data).
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This is a newly described species and was separated from T. tarsier, thus information has been extrapolated from prior knowledge of both it and T. dentatus.. Based on these assumptions, it should occur in primary, secondary and mangrove forests, forests gardens, and a variety of other habitats of varying degrees of human disturbance that provide adequate shrubby cover (M. Shekelle pers. comm.).

Tarsiers show extreme adaptations for vertical clinging and leaping (VCL) in the understory of suitable tropical habitats, often 2 meters or less from the ground. Nocturnal, social primates, they likely live in small, monogamous or polygamous groupings of 2-7. Their diet is 100% live animal prey, mostly insects with some small vertebrates (M. Shekelle pers. comm.).

Threats [top]

Major Threat(s): Although this is a newly described taxon, by analogy with other taxa major threats can be extrapolated to be habitat loss and illegal logging, with lesser threats including agricultural pesticides, and predation by domestic animals (dogs and cats). In addition, some animals may be entering the pet trade. There has been extensive loss of habitat; however, the species has some tolerance to forest conversion. A crucial unknown variable in determining how critical the threats to this species are is its elevational distribution. GIS data indicate that large areas of quality forested habitat remain at higher elevations, but the vertical range of this species is believed to stop somewhere between 1,100-1,500 m, thus rendering a large portion of the best remaining habitat outside the range of this species.

Conservation Actions [top]

Conservation Actions: Tarsiers are protected by national law and international treaties, including CITES Appendix II. Many portions of the range of this taxon are protected and indeed it occurs in at least one national park (Lore Lindu); however, there needs to be improved management of the currently protected areas to ensure the ongoing survival of the species. Public education to overcome the misconception that tarsiers are crop pests would be a step forward in improving conservation measures for the species. In fact the species might actually be beneficial to crops, as they eat, and may even have a dietary preference for, some of the real crop pests such as large grasshoppers.

Classifications [top]

1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
suitability:Suitable  major importance:Yes
1. Forest -> 1.7. Forest - Subtropical/Tropical Mangrove Vegetation Above High Tide Level
suitability:Suitable  major importance:Yes
1. Forest -> 1.9. Forest - Subtropical/Tropical Moist Montane
suitability:Suitable  major importance:Yes
14. Artificial/Terrestrial -> 14.4. Artificial/Terrestrial - Rural Gardens
suitability:Suitable  major importance:Yes
14. Artificial/Terrestrial -> 14.6. Artificial/Terrestrial - Subtropical/Tropical Heavily Degraded Former Forest
suitability:Suitable  major importance:Yes
1. Land/water protection -> 1.1. Site/area protection
1. Land/water protection -> 1.2. Resource & habitat protection
2. Land/water management -> 2.1. Site/area management
3. Species management -> 3.1. Species management -> 3.1.1. Harvest management
4. Education & awareness -> 4.1. Formal education
4. Education & awareness -> 4.3. Awareness & communications
5. Law & policy -> 5.4. Compliance and enforcement -> 5.4.2. National level

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Conservation sites identified:Yes, over entire range
In-Place Species Management
In-Place Education
  Included in international legislation:Yes
  Subject to any international management/trade controls:Yes
2. Agriculture & aquaculture -> 2.1. Annual & perennial non-timber crops -> 2.1.2. Small-holder farming
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

5. Biological resource use -> 5.1. Hunting & trapping terrestrial animals -> 5.1.1. Intentional use (species is the target)
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

5. Biological resource use -> 5.3. Logging & wood harvesting -> 5.3.5. Motivation Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

8. Invasive and other problematic species, genes & diseases -> 8.1. Invasive non-native/alien species/diseases -> 8.1.2. Named species [ Felis catus ]
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

8. Invasive and other problematic species, genes & diseases -> 8.1. Invasive non-native/alien species/diseases -> 8.1.2. Named species [ Canis familiaris ]
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

9. Pollution -> 9.3. Agricultural & forestry effluents -> 9.3.4. Type Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
1. Research -> 1.6. Actions
3. Monitoring -> 3.1. Population trends

♦  Pets/display animals, horticulture
 Local : ✓   National : ✓ 

Bibliography [top]

IUCN. 2008. IUCN Red List of Threatened Species. Available at: http://www.iucnredlist.org. (Accessed: 5 October 2008).

Mackinnon, J. and Mackinnon, K. 1980. The behaviour of wild spectral tarsiers. International Journal of Primatology 1(4): 361 – 379.

Merker, S. and Groves, C. 2006. Tarsius lariang: a new primate species from western central Sulawesi. International Journal of Primatology 27(2): 465–485.

Citation: Shekelle, M., Merker, S. & Salim, A. 2008. Tarsius lariang. In: . The IUCN Red List of Threatened Species 2008: e.T136319A4273932. . Downloaded on 21 June 2018.
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