|Scientific Name:||Chiropotes utahickae Hershkovitz, 1985|
Chiropotes satanas ssp. utahicki Hershkovitz, 1985
Chiropotes satanus Hershkovitz, 1985 ssp. utahicki
|Taxonomic Notes:||Hershkovitz (1985) revised the genus Chiropotes and recognized two species, Chiropotes albinasus and Chiropotes satanas, the second containing three subspecies (Chiropotes s. satanas, Chiropotes s. chiropotes and Chiropotes s. utahicki). Based on results of analyses of morphological, morphometric and molecular data, Silva Jr. and Figueiredo (2002) raised the three subspecies to species level, and divided the populations occurring on either side of the rio Branco into two distinct taxa. They proposed a taxonomic arrangement with five species: Chiropotes albinasus, Chiropotes satanas, Chiropotes utahickae, Chiropotes chiropotes and Chiropotes sagulatus Traill, 1821, the latter representing the eastern form of C. chiropotes, which occurs to the east of the rio Branco, in Brazil, Suriname and the Guianas.
The species name is currently in dispute. Hershkovitz (1985) named the subspecies Chiropotes satanas utahicki. However, as the species is named after a woman, in subsequent revisions authors renamed the species Chiropotes (satanas) utahickae (Silva Jr. and Figueiredo 2002; Groves 2005). Brandon-Jones et al. (2006) argue that the Latin gender suffix is part of its etymology and therefore unregulated by Article 31 of the International Code of Zoological Nomenclature, and that the author's selected suffix should be respected and the original spelling preserved.
|Red List Category & Criteria:||Endangered A3cd ver 3.1|
|Assessor(s):||Veiga, L. M., Silva Jr. J. S., Ferrari, S. F. & Rylands, A. B.|
|Reviewer(s):||Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)|
Listed as Endangered as there is reason to believe this species will decline by at least 50% over the coming 30 years (three generations) due mainly to the expanding agricultural frontier in this region, combined with the effects of hunting.
|Previously published Red List assessments:|
|Range Description:||Endemic to Brazil, the species inhabits the Amazon lowlands, between the Rios Xingu, Amazon and Tocantins-Araguaia (Hershkovitz 1985; Ferrari and Lopes 1996). The exact limits of its range are unknown. However, National Museum (Rio de Janeiro) archives include a record for the region of rio Tapirapé in north-east Mato Grosso, near the forest-savanna transition (J. Siiva Jr. pers. comm.). It is therefore possible that the species occurs in forested areas at the interface between the two biomes.|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Using standardized line transects, population densities and sighting rates have been calculated for a number of areas (see Table 1). This species may occur in greater densities in altered habitats and forest fragments than in areas of continuous forest (Bobadilla and Ferrari 1998; Ferrari et al. 1999).|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||Uta Hick's Bearded Saki is endemic to the fluvial plain of Amazonia, where it occurs in tall terra firme humid forests at low altitudes. It has been recorded in disturbed forests. |
This species is highly frugivorou, with the diet comprised of seeds (53%), fruit pulp (26%), flowers (18%) and small quantities of insects, leaves and other plant parts (Santos 2002; Vieira 2005). In a study of a group on an island (129 ha), over 150 plant species were consumed. Important species include Alexa grandiflora (Fabaceae), Annona tenuipes (Annonaceae), Inga alba (Mimosaceae), Eschweilera sp. (Lecythidaceae) and Attalea speciosa (Arecaceae). Home range sizes between 60 and 100 ha, and average daily walking distances of 2.5 km have been recorded (Vieira 2005). Recent studies have demonstrated that eastern Amazonian bearded sakis are more tolerant of anthropogenic habitat disturbance than previously assumed, with groups often able to survive in isolated fragments (<50 ha), some of which have been isolated for over 20 years (Ferrari et al. 2002; Santos 2002; Vieira 2005).
|Major Threat(s):||The key threats to its future survival are habitat loss and fragmentation. The establishment of several large projects (such as the Transamazonian highway BR-230), which bisects the interfluvium from east to west, the Carajás Mineral Complex and the Tucuruí hydroelectric dam, have lead to considerable habitat loss. In the north of the range, the habitat is under pressure from both small-holder and large-scale farming activities and cattle ranching. This species is also hunted for its meat and fur, and hunting pressure is likely to increase due to habitat fragmentation.|
The following federal reserves occur within the Uta Hick’s Bearded Saki’s range in the state of Pará: REBIO de Tapirapé (103,000 ha), FLONA Carajás (411,949 ha), FLONA Caxiuanã (324,060 ha), FLONA Itacaiúna (141,400 ha), FLONA Tapirapé-Aquiri (190,000 ha), APA Igarapé Gelado (21,600 ha), RESEX Ipaú-Anilzinho (55,816 ha) and RDS Itapuã-Baquiá (64,735 ha). State reserves in Pará include: the Parque Estadual da Serra dos Martírios/Andorinhas (24,897 ha), APA Lago de Tucuruí – margem esquerda (568,667 ha), APA São Geraldo do Araguaia (29,655 ha), RDS Alcobaça (36,128 ha) and RDS Pucuruí-Ararão (29,049 ha) (Lopes et al. in press). Surveys are needed south of the rio Tapirapé in northern Mato Grosso to confirm range limits.
The Primate Protection Centre (Centro de Proteção de Primatas Brasileiros: ICM/CPB), of the Federal Environmental Protection Institute (Instituto Chico Mendes), supports and coordinates primate conservation programmes throughout the country. An international committee to discuss and define actions for the conservation of Amazonian primate taxa (Comitê Internacional para Conservação e Manejo dos Primatas Amazônicos), was established by the the CPB and Instituto Chico Mendes (ICM) and together with the members of the Pitheciine Action Group (PAG) are developing a Conservation Action Plan for the Uta Hick’s Bearded Saki.
It is listed on CITES Appendix II.
|Citation:||Veiga, L. M., Silva Jr. J. S., Ferrari, S. F. & Rylands, A. B. 2008. Chiropotes utahickae. The IUCN Red List of Threatened Species 2008: e.T43892A10830166.Downloaded on 17 December 2017.|