- Pagai Island Macaque
Taxobox
name = Pagai Island MacaqueMSW3 Groves|id=12100558]
status = CR
status_system = iucn3.1
status_ref = IUCN2007 | assessors = Eudey, A. & Members of the Primate Specialist Group | year = 2000 | title = Macaca pagensis ssp. pagensis | id = 39794 | downloaded =2008-07-18 ]
regnum =Animal ia
phylum =Chordata
classis =Mammal ia
ordo =Primate s
familia =Cercopithecidae
genus = "Macaca"
species = "M. pagensis"
binomial = "Macaca pagensis"
binomial_authority = (Miller, 1903)The Pagai Island Macaque ("Macaca pagensis"), also known as the Pagai Macaque or Bokkoi, is an
Old World monkey that is endemic to theMentawai Islands off the west coast ofSumatra . It is listed ascritically endangered on theIUCN Red List due to its ever-shrinking habitat. It formerly included the overall darker "M. siberu" as asubspecies , but this arrangement ispolyphyletic , [Roos, C., T. Zieglerb, J. K. Hodgesb, H. Zischlera, and C. Abegg. 2003. "Molecular phylogeny of Mentawai macaques: taxonomic and biogeographic implications." Molecular Phylogenetics and Evolution 29(1): 139-150.] leading to the two being classified as separate species. Both were formerly considered subspecies of "M. nemestrina".Description
Pagai Island Macaque males are generally larger than females. The males' body length ranges from 45-55 cm and females' body length is around 40–45 cm. Tail length is 13-16 cm for males and 10–13 cm for females. Males are also heavier, weighing around 6–9 kg while females weigh 4.5-6 kg. Their backs have a dark brown coloration, and chestnut to pale ochre on the sides of the neck, the front of the shoulders and the underside of this species. Legs are brown and their arms, reddish brown. The face of a Mentawai Macaques is furless and black-skinned with brown eyes. They have
cheek pouch es to carry food while foraging.Habitat and ecology
The macaques' natural habitat is
rainforest , but can also be found inriverine and coastalswamp -forest s. It lives high above the forest floor in thecanopy , forages between 24 and 36 meters and may sleep as high as 45 meters. The primary diet of the species isfig s. They may split up intosplinter group s to forage for food and to sleep. They will eat alongside groups ofMentawai Langur s. "Macaca pagensis" groups consist of around 5-25 indiviuals. There is typically a single male per group, along with adult females and their offspring. The male decides where to go and communicates this to the rest of the group with high-pitched cries. Roaming, solitary Pagai Island Macaques may challenge the dominant male for his position leading to aggressive fights. The natural predators of the species are theCrested Serpent Eagle and theReticulated Python . When spotted the macaques will alarm the rest of the group with a short, gruff bark.Reproduction
Females show fertility and willingness to mate by displaying their swollen and reddened genitals. Females crouch to initiate mating. The gestation period is between 5 to 6 months. A single offspring is born during the nighttime hours. The mother eats the
placenta and licks the infant clean before morning. The mother and young share a close bond into adulthood.Population and threats
The species' primary habitat is on the Mentawai Islands 150 km off the west coast of Sumatra. They populate three of the four major islands in the chain (
North Pagai ,South Pagai andSipora ). Due todeforestation by immigrants from theIndonesia n mainland the species is now listed as critically endangered on the IUCN red list. The primary reasons behind deforestation on the island are the clearing of large areas of land forcash crop andoil palm plantation s, as well ascommercial logging . As a result, the water levels in the forest rivers fluctuate to a much greater degree than before. The alternating flooding and low water levels has also caused an increase in the population ofmalaria lmosquito es.References
External links
* ARKive - [http://www.arkive.org/species/GES/mammals/Macaca_pagensis/ Images and information about the Mentawai Macaque "(Macaca pagensis)"]
* [http://members.tripod.com/uakari/macaca_pagensis.html Mentawai Macaque]
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