Total population is estimated at 1,100-1,300.

The total population is estimated as 1,100 - 1,300 animals. They live in large troops which can number up to 80 individuals, the average being somewhere around 20 to 40 monkeys. Abstract: Two Endangered primate taxa, the Tana River red colobus (population estimate less than 1200) and the Tana River mangabey (population estimate less than 2000), are only known from a restricted area of patchy riverine forest in the floodplain of the Lower Tana River in Kenya. They are the only remaining habitats for 2 threatened primates: the Tana River red colobus (Procolobus rufomitratus) and the Tana River crested mangabey (Cercocebus galeritus galeritus). Metadata Show full item record. We estimate population size of the red colobus to be 788 individuals in 82 groups and that of the crested mangabeys to be 2,070 individuals in 59 groups. It was formerly considered a subgenus within the genus Procolobus, which is now restricted to the olive colobus. At least 86 groups occur. They are closely related to the black-and-white colobus monkeys (genus Colobus), and some species are often found in groups with the blue monkey. 2 threatened primates: the Tana River red colobus (Procolobus rufomitratus) and the Tana River crested mangabey (Cercocebus galeritus galeritus).We conducted censuses in 73 forest patches from January through March 2001. View/ Open. The western red colobus is frequently hunted by the common chimpanzee. Full-text (2.351Mb) Date 1991. The total known range is just 60km. Ochiago, W Odhiambo. We estimate population size of the red colobus to be 788 individuals in 82 groups and that of the crested mangabeys to be 2,070 individuals in 59 groups. We studied the population size and distribution of diurnal primates in the lower Tana River forests, Kenya. Food, grooming, and sexual partners are distributed amongst higher-ranking individuals initially, followed by lower-ranking individuals. Author. We conducted censuses in 73 forest patches from January through March 2001. Habitat and range. Tana River red colobus have a distributional range which extends for about 60 km along the lower Tana River from Kipende to Mitapani.

Population. The Tana River Red Colobus is limited to a very small area made up of fragmented patches of forest along the banks of the lower Tana River in Kenya. and the Tana River crested mangabey(Cercocebus galeritus galeritus).We conducted censuses in 73 forest patches from January through March 2001. The Tana River Primate Reserve was established in 1976 to protect the remaining forest along the Tana River and the most threatened primate species, which are; the Tana River Red Colobus and the Tana River Mangabey, both endemic to the forests of lower Tana River. Groups often establish a dominance hierarchy determined by aggressive behavior. They were found in 34 (63%) of the forests. Estimated population: 1,100-1,300, as per the recent data on IUCN. Piliocolobus rufomitratus, or Tana River red colobus monkey, inhabits patches of evergreen riverine forest that undergo periodic flooding from the Tana River. Habitat: Gallery forest near the Tana River in southeastern Kenya.

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