Cercopithecus preussi — Details

Preuss's Monkey learn more about names for this taxon

Overview

Distribution

Range Description

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This species has a restricted distribution in western Cameroon, eastern Nigeria, and on Bioko Island. It is most abundant in montane and sub-montane forest up to at least 2,500 m asl. Its range includes isolated patches of forest in the grasslands of the Cameroon Highlands.

This species is divided into two subspecies: C. preussi preussi, on the mainland, and C. p. insularis, which is restricted to Bioko Island.
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Ecology

Habitat

Habitat and Ecology

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Habitat and Ecology
This species is found mainly in montane and submontane forest above 800 m, and on Bioko shows a preference for Schefflera forest (Gonzalez Kirchner 2004; Hearn et al. 2006). It is also more rarely found in lowland forest (e.g., to 450 in the Caldera on Bioko), and can occur in isolated forest patches in mountainous grasslands. They have semi-terrestrial habits and are found usually in the understorey of the forest. Little is known about feeding behaviour, but it is known to eat fruits, seeds, leaves, and flowers. This species lives in groups of 2-12 animals, consisting of a single male and several females with their young.

Systems
  • Terrestrial
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Life History and Behavior

Life Expectancy

Lifespan, longevity, and ageing

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Maximum longevity: 26 years (captivity) Observations: One wild born female was about 26 years old when she died in captivity (Richard Weigl 2005).
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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
EN
Endangered

Red List Criteria
A2cd

Version
3.1

Year Assessed
2008

Assessor/s
Oates, J.F.

Reviewer/s
Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)

Justification
This species is listed as Endangered as it is believed to have undergone a decline exceeding 50% over the past ~27 years across its restricted range, mainly as a result of increasing habitat loss in the Nigeria/ Cameroon highlands and also from hunting.

History
  • 2000
    Endangered
  • 1996
    Endangered
  • 1994
    Endangered
    (Groombridge 1994)
  • 1990
    Endangered
    (IUCN 1990)
  • 1988
    Endangered
    (IUCN Conservation Monitoring Centre 1988)
  • 1988
    Endangered
  • 1986
    Vulnerable
    (IUCN Conservation Monitoring Centre 1986)
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Population

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Population
There has been no comprehensive population survey of this species, except on Bioko where the species has undergone declines exceeding 55% over a 20-year period (1986-2006; Hearn et al. 2006). On the mainland, the species is uncommon and highly fragmented.

Population Trend
Decreasing
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Threats

Threats

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Major Threats
This species’ population size and distribution have been severely affected by habitat destruction and hunting. For example, Cameroon’s forests have been severely eroded by cultivation, fire and collection of wood for fuel. As a result, little montane forest remains in the mainland part of this species’ range. This species is highly susceptible to human predation because it is semi-terrestrial and relatively large-bodied, and hunting has led to a decline in its population across its range, but particularly on Bioko.
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Management

Conservation Actions

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Conservation Actions
This species is listed as Class B under the African Convention, and under Appendix II of CITES. The species occurs in the Okwangwo division of Cross River National Park and on the adjacent Obudu Plateau (Nigeria), Pico Basile National Park and the Southern Highlands Scientific Reserve (Bioko), and in the Takemanda Forest Reserve, Ibo Forest, and Banyang-Mbo Forest (Cameroon) which has been proposed for elevated protection status. Surveys of the status and distribution across its range are needed. None of the montane forest areas of the Cameroon highlands, the most important remaining habitat for this species, are formally protected and require urgent conservation action.
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Wikipedia

Preuss's monkey

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Preuss's monkey (Cercopithecus preussi), also known as Preuss's guenon, is a diurnal primate that lives terrestrially in mountainous (up to 2500 m) forests of eastern Nigeria, western Cameroon and Bioko in Equatorial Guinea. It is sometimes classified as a subspecies of the L'Hoest's monkey (C. lhoesti).

The diet of Preuss's monkey is primarily fruit, leaves and insects, although the species occasionally raids human crops. It is darkish in coloration with a white chin, and adult males have a blue scrotum. Preuss's monkeys weigh up to 10 kg. Troops consist of one adult male and several females and adolescents, averaging 17 total per troop. Females give birth to a single offspring about once every three years. The young mature at 4 years and live to be an average of 31 years.

Preuss's monkey is an endangered species, due to habitat loss and hunting. It is one of the species that live in the Guinean Forests of the West Africa Biodiversity Hotspot.

There are two subspecies of Preuss's monkey:

References

  1. ^ Groves, C. (2005). Wilson, D. E., & Reeder, D. M, eds. ed. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. pp. 158. OCLC 62265494. ISBN 0-801-88221-4. http://www.bucknell.edu/msw3/browse.asp?id=12100495. 
  2. ^ Oates, J. F. (2008). Cercopithecus preussi. In: IUCN 2008. IUCN Red List of Threatened Species. Downloaded on 4 January 2009.
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