Black colobus

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Black colobus [1]
1 - Colobus polykomos 2 - Colobus satanas.jpg
Black colobus (Colobus satanas) (right)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Cercopithecidae
Genus: Colobus
Species:
C. satanas
Binomial name
Colobus satanas
Waterhouse, 1838
Subspecies
  • C. s. satanas
  • C. s .anthracinus
Black Colobus area.png
Black colobus range

The black colobus (Colobus satanas), or satanic black colobus, is a species of Old World monkey belonging to the genus Colobus . The species is found in a small area of western central Africa. Black colobuses are large, completely covered with black fur, and like all other Colobus monkeys, do not have a thumb. [3] The species has faced large declines in population due to habitat destruction and hunting by humans, and was consequently listed as Vulnerable on the IUCN Red List in 1994. [2]

Taxonomy

The black colobus monkey is one of five recognised species in the genus Colobus. The black colobus is the oldest species in this genera and is thought to have diverged 3-4 million years ago.

There are two subspecies of black colobus monkey:

Etymology

The word 'Colobus' comes from the Greek word for 'mutilated', as all Colobus monkeys only have a short stump where the thumb would be. The word 'satanas' means 'the accuser' or 'the devil' in Greek. [5]

Description

Colobus satanas skull Colobus satanas 02 MWNH 332.jpg
Colobus satanas skull

The black colobus monkey is a large species with a head-body length of 50–70 cm and a long tail of around 80 cm. As in all Colobus species, the black colobus has a slender build and ischial callosities - tough pads of skin on the rump. There is little sexual dimorphism between the two sexes - adult males can weigh between 10–15 kg, whilst females weigh between 10–11 kg. [3] [6] The black colobus is covered in black fur apart from the ears and face, and has longer hairs on its cheeks and forehead. Unlike other species of colobus monkey, black colobuses have no white markings. [3] The two subspecies of black colobus look very similar, although the fur of Colobus s. satanas is slightly longer and fluffier. There is currently not enough data to estimate the life expectancy of the species. [7]

Distribution and habitat

The black colobus monkey is found in Equatorial Guinea, south west Cameroon and central and north-western Gabon. Small populations may also occur in the north of the Republic of the Congo. The subspecies C.s.satanas is only found on Bioko Island, off the coast of Cameroon. [8] The distribution of the black colobus has decreased dramatically - the species is now rare or absent in some areas of its range due to its habitat being destroyed for logging. Black colobuses are known to live at low densities, but there is currently no total population estimate for the species. One of the largest remaining populations of the species, consisting of 50,000-55,900 individuals, is found in Lope Reserve, Gabon. Other remaining large populations are found in the Foret des Abeilles in central Gabon and Douala-Edea Reserve in Cameroon. [2]

The black colobus is an arboreal species that lives high in the canopy of dense rainforest and occasionally coastal sand dune or wooded meadows. [3] Black colobuses are unable to survive in secondary forest that has regrown after a major disturbance such as logging and therefore tend to avoid areas populated by humans. [9] The black colobus cannot be bred in captivity due to the food and habitat it requires. [10]

Behaviour

Diet

Black colobus monkeys are herbivores and feed predominantly on seeds. [11] Their robust, flat teeth allow them to chew tough seeds easily. This diet means that the species plays an important role as seed dispersers in the ecosystem. Black colobuses also eat large amounts of leaves, in particular lianas, as well as flowers, buds and unripe fruits. [3] Unlike most primates, Colobus monkeys have multi-chambered ruminant stomachs which allow them to easily digest these leaves. Younger leaves and seeds are preferred, as these are rich in nutrients and contain lower amounts of digestion-inhibiting compounds such as tannin. [11] However, the black colobus monkey can withstand high levels of these poisonous compounds and can therefore eat food that is undigestable to other colobus monkeys. This means they can live in areas unoccupied by other species. [3] Black colobus monkeys have also been observed eating soil, which may be to ensure that they have enough minerals such as sodium in their diet. [12]

Social structure

Black colobus monkeys live in multi-male groups of 10-20 individuals. The species is territorial and will make loud calls to warn other groups away from the area in which they are feeding. [6] The black colobus call is distinctive from other primate species and sounds like a loud 'sneeze' followed by a roaring noise. [3] Black colobus groups are sometimes joined by single male crested mona monkeys (Cercopithecus pogonias). These individuals take part in black colobus grooming and socialising and are thought integrate themselves into black colobus groups for protection. Colobus monkeys have been known to respond to crested mona monkey alarm calls. [13]

Activity

Black colobus monkeys are diurnal and spend around 60% of their time resting. The remaining part of their day is spent feeding, socialising and moving. Black colobuses have large home ranges and will move up to 850 metres each day in search of food. [3]

Reproduction

Black colobus monkeys do not have a specific breeding season, but most mating occurs during rainy times of the year. Males reach sexual maturity at age 6, in females this occurs at age 4. Females do not have a sexual swelling as seen in other primate species and give birth to a single baby after a gestation period of around 195 days. Females have a baby every 20 months on average. [5] Black colobus babies are born with brown fur and become black, unlike all other Colobus species, which are born with white fur. [3] Allomothering, when other members of the group help mothers to care for their babies, is relatively rare in the black colobus monkey. [14] Black colobus babies are carried around by the mother and spend time playing with other members of the group as they grow in order to learn and socialise. [5]

Conservation

The black colobus monkey is one of the most threatened primate species in Africa and is currently listed as Vulnerable on the IUCN Red List. [15] This is because the species' population has declined by over 30% in the past 30 years. The subspecies C.s.satanas is classified as Endangered as its population has declined by over 60% in the last 30 years. [2] The black colobus monkey is now only found in areas which cannot be easily accessed by humans. [3]

The species has faced population declines due to logging and illegal hunting for the fur trade which began in the 19th century. [6] [15] Due to improved roads and increased wealth in the area, commercial hunting for the species has become more profitable. [10] Today, black colobus monkeys are mainly traded for their meat and account for 20% of the bushmeat sold in Malabo, the capital of Equatorial Guinea. [16] One adult black colobus carcass is sold for around US$20.42. [17]

The black colobus monkey is listed under Appendix II of CITES, which restricts international trade of the species. [18] The species is also listed under Class B of the African Convention on the Conservation of Nature and Natural Resources. [2] Further information and data is needed to in order to help conserve the species. Conservation programs such as the Bioko Biodiversity Protection Program aim to work with local people to learn more about the black colobus monkey and protect it from extinction. [19]

Related Research Articles

<span class="mw-page-title-main">Black-and-white colobus</span> Genus of Old World monkeys

Black-and-white colobuses are Old World monkeys of the genus Colobus, native to Africa. They are closely related to the red colobus monkeys of genus Piliocolobus. There are five species of this monkey, and at least eight subspecies. They are generally found in high-density forests where they forage on leaves, flowers and fruit. Social groups of colobus are diverse, varying from group to group. Resident-egalitarian and allomothering relationships have been observed among the female population. Complex behaviours have also been observed in this species, including greeting rituals and varying group sleeping patterns. Colobi play a significant role in seed dispersal.

<span class="mw-page-title-main">Bushmeat</span> Meat hunted in tropical forests

Bushmeat is meat from wildlife species that are hunted for human consumption. Bushmeat represents a primary source of animal protein and a cash-earning commodity in poor and rural communities of humid tropical forest regions of the world.

<span class="mw-page-title-main">Colobinae</span> Subfamily of Old World monkeys

The Colobinae or leaf-eating monkeys are a subfamily of the Old World monkey family that includes 61 species in 11 genera, including the black-and-white colobus, the large-nosed proboscis monkey, and the gray langurs. Some classifications split the colobine monkeys into two tribes, while others split them into three groups. Both classifications put the three African genera Colobus, Piliocolobus, and Procolobus in one group; these genera are distinct in that they have stub thumbs. The various Asian genera are placed into another one or two groups. Analysis of mtDNA confirms the Asian species form two distinct groups, one of langurs and the other of the "odd-nosed" species, but are inconsistent as to the relationships of the gray langurs; some studies suggest that the gray langurs are not closely related to either of these groups, while others place them firmly within the langur group.

<span class="mw-page-title-main">King colobus</span> Species of Old World monkey

The king colobus, also known as the western black-and-white colobus, is a species of Old World monkey, found in lowland and mountain rainforests in a region stretching from Senegal, through Guinea-Bissau, Guinea, Sierra Leone and Liberia to the Ivory Coast. One of five members of the genus Colobus, the black-and-white colobuses, the king colobus is the westernmost species of the group on the continent of Africa. It eats mainly leaves, but also fruits and flowers. Though it is arboreal, it eats primarily on the ground. It lives in small groups consisting of 3 to 4 females and 1 to 3 males, plus their young. These groups maintain distance from one another through territorial calling.

<span class="mw-page-title-main">Mantled guereza</span> Species of mammal

The mantled guereza, also known simply as the guereza, the eastern black-and-white colobus, or the Abyssinian black-and-white colobus, is a black-and-white colobus, a type of Old World monkey. It is native to much of west central and east Africa, including Cameroon, Equatorial Guinea, Nigeria, Ethiopia, Kenya, Tanzania, Uganda and Chad. The species consists of several subspecies that differ in appearance. It has a distinctive appearance, which is alluded to in its name; the long white fringes of hair that run along each side of its black trunk are known as a mantle. Its face is framed with white hair and it has a large white tail tuft.

<span class="mw-page-title-main">Red colobus</span> Genus of Old World monkeys

Red colobuses are Old World monkeys of the genus Piliocolobus. It was formerly considered a subgenus within the genus Procolobus, which is now restricted to the olive colobus. They are closely related to the black-and-white colobus monkeys, and some species are often found in groups with the blue monkey. The western red colobus is frequently hunted by the common chimpanzee.

<span class="mw-page-title-main">Miss Waldron's red colobus</span> Species of Old World monkey

Miss Waldron's red colobus is a species of the red colobus native to West Africa. It had previously been described as a subspecies of the western red colobus, P. badius. It has not been officially sighted since 1978 and was considered extinct in 2000. However, new evidence suggests that a very small number of these monkeys may be living in the southeast corner of Côte d'Ivoire. The IUCN Red List notes Miss Waldron's red colobus as critically endangered.

<span class="mw-page-title-main">Western red colobus</span> Species of Old World monkey

The western red colobus, also known as the bay red colobus, rust red colobus or Upper Guinea red colobus, is a species of Old World monkey in West African forests from Senegal to Ghana. All other species of red colobuses have formerly been considered subspecies of P. badius. It is often hunted by the common chimpanzee. In 1994, western red colobus monkeys infected many chimpanzees with Ebola virus when the chimpanzees hunted the monkeys as prey.

<span class="mw-page-title-main">Angola colobus</span> Species of Old World monkey

The Angola colobus, Angolan black-and-white colobus, or Angolan colobus is a primate species of Old World monkey belonging to the genus Colobus.

<span class="mw-page-title-main">Collared mangabey</span> Species of Old World monkey

The collared mangabey, also called red-capped mangabey and white-collared mangabey, is a species of primate in the family Cercopithecidae of Old World monkeys. It formerly included the sooty mangabey as a subspecies. As presently defined, the collared mangabey is monotypic.

<span class="mw-page-title-main">Red-eared guenon</span> Species of Old World monkey

The red-eared guenon, also called red-eared monkey or russet-eared guenon, is a primate species in the family Cercopithecidae. It is native to subtropical and tropical moist lowland forests in Cameroon, Equatorial Guinea and Nigeria. It is listed as Vulnerable on the IUCN Red List and is threatened by habitat loss, illegal bushmeat hunting and pet trade.

<span class="mw-page-title-main">Crested mona monkey</span> Species of Old World monkey

The crested mona monkey, also known as the crowned guenon, crowned monkey, golden-bellied guenon, or golden-bellied monkey,, is a species of African primate in the family Cercopithecidae found in west central Africa.

<span class="mw-page-title-main">Ursine colobus</span> Species of Old World monkey

The ursine colobus, also known as the white-thighed colobus, Geoffroy's black-and-white colobus, or the white-thighed black-and-white colobus, is a West African species of primate in the family Cercopithecidae.

<span class="mw-page-title-main">Pennant's colobus</span> Species of Old World monkey

Pennant's colobus or Pennant's red colobus is a species of tree-dwelling primate in the family Cercopithecidae. It is endemic to tropical Central Africa. Three subspecies have traditionally been recognised but its distribution is peculiarly disjunct and has been considered a biogeographical puzzle, with one population on the island of Bioko, a second in the Niger River Delta in southern Nigeria, and a third in east-central Republic of Congo. It is found in rainforests and marshy forests. It is threatened by habitat loss and hunting for bushmeat.

<span class="mw-page-title-main">Olive colobus</span> Species of Old World monkey

The olive colobus monkey, also known as the green colobus or Van Beneden's colobus, is a species of primate in the family Cercopithecidae. Its English name refers to its dull olive upperparts. It is the smallest example of all colobine monkeys and is rarely observed in its natural habitat because of its cryptic coloration and secretive nature. It is found in the rain forests of West Africa, ranging from southern Sierra Leone to Nigeria. The IUCN Red List classifies the olive colobus as vulnerable, with the cause of its decline attributed to habitat loss and hunting. Though much of the land within the range of the olive colobus has been affected by human activities, it retains its ability to thrive in small degraded forest fragments.

<span class="mw-page-title-main">Roloway monkey</span> Species of monkey

The Roloway monkey is an endangered species of Old World monkey endemic to tropical West Africa. It was previously considered a subspecies of the Diana monkey. The species is classified as Critically Endangered due to habitat loss and their continued hunting because of the bushmeat trade. The Roloway monkey is mainly an arboreal species, for the most part inhabiting forests in Ghana and some reserves in South-Eastern Côte-D'Ivoire. More specifically, studies have shown that C. roloway is primarily concentrated in the Tanoé forest of the Côte-D'Ivoire because of their heavy threats to extinction and lack of habitat. It is still difficult to gather data on wild subjects, as they have low populations in a vast forest, but they are a unique and vanishing species.

<span class="mw-page-title-main">Ugandan red colobus</span> Species of Old World monkey

The Ugandan red colobus or ashy red colobus is an endangered species of red colobus monkey, recognised as a distinct species since 2001. There is disagreement however over taxonomy with many considering the Ugandan red colobus to be a subspecies. The Ugandan red colobus is an Old World monkey which is found in five different locations across Uganda and Tanzania.

<span class="mw-page-title-main">Niger Delta red colobus</span> Species of Old World monkey

The Niger Delta red colobus is a critically endangered species of colobus monkey endemic to the western part of the Niger Delta. It is threatened by hunting and habitat loss.

<span class="mw-page-title-main">Luba Crater Scientific Reserve</span> Protected area of Bioko, Equatorial Guinea

The Gran Caldera de Luba Scientific Reserve is a protected area of 51,000 hectares on the volcanic island of Bioko, a part of Equatorial Guinea. The dense rainforest is rich in plant and animal species including a high population of primates, some endemic to the reserve. Much of the reserve consists of pristine forest. However, the primate population is under threat due to growing demand for bushmeat coupled with lack of enforcement of the ban on hunting in the reserve.

<span class="mw-page-title-main">Bouvier's red colobus</span> Species of Old World monkey

Bouvier's red colobus is a species of colobus monkey rediscovered in the Republic of the Congo in 2015, after four decades without a confirmed sighting.

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