Chlorocebus | |
---|---|
Chlorocebus head color patterns Top left: green monkey, top right: grivet Bottom left: malbrouck, bottom right: vervet | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Primates |
Suborder: | Haplorhini |
Infraorder: | Simiiformes |
Family: | Cercopithecidae |
Subfamily: | Cercopithecinae |
Tribe: | Cercopithecini |
Genus: | Chlorocebus J. E. Gray, 1870 |
Type species | |
Simia aethiops Linnaeus, 1766 | |
Species | |
Chlorocebus is a genus of medium-sized primates from the family of Old World monkeys. Six species are currently recognized, although some people classify them all as a single species with numerous subspecies. Either way, they make up the entirety of the genus Chlorocebus.
Confusingly, the terms "vervet monkey" and "green monkey" are sometimes used to refer to the whole genus Chlorocebus, though they also refer more precisely to species Chlorocebus pygerythrus and Chlorocebus sabaeus , respectively, neither of which is the type species for Chlorocebus. This article uses the term Chlorocebus consistently for the genus and the common names only for the species.
The native range of these monkeys is sub-Saharan Africa from Senegal and Ethiopia south to South Africa. However, in previous centuries, a number of them were taken as pets by early Caribbean settlers and slave traders, and were transported across the Atlantic Ocean to the Caribbean islands. The monkeys subsequently escaped or were released and became naturalized. Today, they are found on the West Indian islands of Barbados, Saint Kitts, Nevis, Anguilla, and Saint Martin. A colony also exists in Broward County, Florida. [1]
The classification of the Chlorocebus monkeys is undergoing change. They were previously lumped together with the medium-sized arboreal African monkeys of the guenon genus, Cercopithecus, where they were classified as a single species, Cercopithecus aethiops . [2] More species and subspecies are expected to be identified as scientists study this genus further.
Common name | Scientific name and subspecies | Range | Size and ecology | IUCN status and estimated population |
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Bale Mountains vervet | C. djamdjamensis (Neumann, 1902) Two subspecies
| Eastern Africa | Size: 43–45 cm (17–18 in) long, plus 47–50 cm (19–20 in) tail [3] Habitat: Forest [4] Diet: Leaves and fruit, as well as flowers, small vertebrates, shoots, stems, and roots [5] | VU
|
Dryas monkey | C. dryas (Schwarz, 1932) | Central Africa | Size: 36–40 cm (14–16 in) long, plus 48–52 cm (19–20 in) tail [6] Habitat: Forest [7] Diet: Fruit, leaves, shoots, pith, seeds, insects, and mushrooms [7] | EN
|
Green monkey | C. sabaeus (Linnaeus, 1766) | Western Africa | Size: 42–46 cm (17–18 in) long, plus 42–72 cm (17–28 in) tail [3] Habitat: Forest and savanna [8] Diet: Fruit and leaves [9] | LC
|
Grivet | C. aethiops (Linnaeus, 1758) Two subspecies
| Eastern Africa | Size: 40–60 cm (16–24 in) long, plus 30–50 cm (12–20 in) tail [10] Habitat: Savanna and shrubland [11] Diet: Fruit, insects, and vegetable matter, as well as small mammals and birds [10] | LC
|
Malbrouck | C. cynosuros (Scopoli, 1786) | Southern Africa | Size: 34–70 cm (13–28 in) long, plus 44–79 cm (17–31 in) tail [12] Habitat: Forest and savanna [13] Diet: Fruit, as well as shoots, stems, gum, and seeds [12] | LC
|
Tantalus monkey | C. tantalus (Ogilby, 1841) Three subspecies
| Equatorial Africa | Size: 38–83 cm (15–33 in) long, plus 55–114 cm (22–45 in) tail [14] Habitat: Forest and savanna [15] Diet: Fruit, buds, seeds, roots, bark, and gum, as well as insects, small vertebrates and eggs [14] | LC
|
Vervet monkey | C. pygerythrus (F. Cuvier, 1821) Five subspecies
| Eastern and southern Africa | Size: 42–57 cm (17–22 in) long, plus 48–75 cm (19–30 in) tail [14] Habitat: Savanna, shrubland, and forest [16] Diet: Leaves, flowers, fruit, seeds, arthropods, and gum [17] | LC
|
The most basal member of the genus is thought to be the dryas monkey (C. dryas), which was previously classified in Cercopithecus and may potentially warrant its own genus. [18]
The dorsal fur of Chlorocebus monkeys varies by species from pale yellow through grey-green brown to dark brown, while the lower portion and the hair ring around the face is a whitish yellow. [2] The face, hands, and feet are hairless and black, although their abdominal skin is bluish. [2] Males have a blue scrotum and red penis. [2] The monkeys are sexually dimorphic, wild adult males range from 42 to 59 cm (17 to 23 in) and females are 30 to 49.5 cm (11.8 to 19.5 in), including a tail measuring 30 to 50 cm (12 to 20 in). [2] Males weigh from 3.9 to 8 kg (8.6 to 17.6 lb) and females weigh from 3.4 to 5.3 kg (7.5 to 11.7 lb). [2]
Unlike the closely related guenons, Chlorocebus species are not primarily forest dwellers. Rather, they are semi-arboreal and semi-terrestrial, spending most of the day on the ground feeding and then sleeping at night in the trees. [2] However, they must drink each day and are dependent on water, so they are never far from rivers or lakes. [2] Like most other Old World monkeys, they have cheek pouches for storing food. They are diurnal, and are particularly active in the early morning and in the later afternoon or early evening. [2]
Chlorocebus monkeys live in multiple male/multiple female groups, which can be as large as 76 individuals. [2] The group hierarchy plays an important role: dominant males and females are given priority in the search for food, and are groomed by subordinate members of the group. They exhibit female philopatry, a social system whereby the females remain in the same home range where they were born, and males leave once sexually mature. [2] These monkeys are territorial animals, and a group can occupy an area of approximately .06 to 1.78 km2 (0.023 to 0.687 sq mi). [19] They use a wide variety of vocalizations. [2] They can with warn off members of other groups from their territory, and they can also warn members of their own troop of dangers from predators, using different calls for different predators. [2] Monkeys scream when they are disciplined by members of the troop. Facial expressions and body posturing serve as additional communication tools. [2] Their social interactions are highly complex. Where alliances can be formed for benefit, deception is sometimes used. Physical affection is important between family members.
Chlorocebus monkeys are, along with chimpanzees and baboons, the most omnivorous of the primates. [2] They will eat leaves, gum, seeds, nuts, grasses, fungi, fruit, berries, flowers, buds, shoots, invertebrates, bird eggs, birds, lizards, rodents, and other vertebrate prey. [2] Their preferred foods are fruit and flowers, a seasonal resource, varied to cope with changes in food availability. [2] On the island of Saint Kitts, they will commonly steal brightly coloured alcoholic drinks left behind by tourists on the beach. [20] Many tourists have also found out these monkeys will deliver a powerful bite if they are cornered or threatened. In Africa, the documented attacks by these monkeys are extremely rare when compared with dog attacks, in spite of living very closely with humans and often being threatened by humans and their dogs.
To signal mating readiness, the female presents her vulva to the male. Since groups are made of several more females than males, each male mates with several females. Generally, the male will display a striking, light-blue scrotal pouch, most prevalent during the mating season. Males do not take part in raising the young, but other females of the group (the "aunties") share the burden. The dominance hierarchy also comes into play, as the offspring of the more dominant group members get preferential treatment. The gestation time is about 163–165 days, [2] and births are typically of a single young. The births usually happen at the beginning of the rainy season, when sufficient food is available. The young are weaned at about six months of age and are fully mature in four to five years. The life expectancy of the green monkeys is 11–13 years in captivity, [2] and about 10–12 years in the wild.
In the Caribbean islands, interactions between humans and monkeys are sometimes problematic. On the island of Barbados, farmers complain about the monkeys damaging their crops, and many try to find ways to keep them at bay. On Halloween 2006, a monkey was suspected of causing an island-wide, eight-hour blackout. The monkey apparently climbed a light pole and tripped an 11,000- and 24,000-volt powerline. [21] [22] [23] [24]
In some African countries, many monkeys are killed by power lines, dogs, predatory animals e.g. wild cats, vehicles, shooting, poisoning, and hunting for sport. Added to this, an increase in desertification, and loss of habitat due to agriculture and urbanisation has occurred. As a result, the population numbers in troops are declining in urban areas to an average of between 15 and 25 individuals, with many troops disappearing altogether.[ citation needed ]
The African green monkey has been the focus of much scientific research since the 1950s, and cell lines derived from its tissues are still used today to produce vaccines for polio [25] and smallpox. [26] Chlorocebus species are also important in studying high blood pressure and AIDS. Unlike most other nonhuman primates, they naturally develop high blood pressure. In Africa, the monkeys are massively infected with simian immunodeficiency virus (SIV), related to the ancestor of human immunodeficiency virus (HIV), both of which are widespread throughout populations. [27] [28] Chlorocebus monkeys are a natural host of SIV and do not succumb to immunodeficiency upon infection; [29] therefore they are an important model in AIDS studies to understand protective mechanisms against AIDS. [30] [31] The monkeys infected with SIV and humans infected with HIV differ in microbial responses to infection. [32]
Vero cells are a continuous cell line derived from epithelial cells of the African green monkey kidney, and are widely used for research in immunology and infectious disease. Similar cell lines include buffalo green monkey kidney and BS-C-1. [33]
Chlorocebus monkeys are an important model organism for studies of AIDS, microbiome, development, neurobehavior, neurodegeneration, metabolism and obesity. [34] A genome of chlorocebus monkey (Chlorocebus sabaeus) was sequenced [35] and the genome reference with gene models is available in genome browsers NCBI Chlorocebus_sabeus 1.1 and Ensembl Vervet-AGM (Chlorocebus sabaeus) Archived 2021-05-13 at the Wayback Machine . It facilitated genomic investigations in this monkey, including population genetics studies across Africa and Caribbean [36] and characterization of gene expression regulation across development in brain and peripheral tissues, [37] during prenatal development, [38] and during reaction to psychosocial stress related to relocation and social isolation. [39]
Epigenetic clock based on CpG methylation in DNA - a complex biomarker of aging - was developed for Chlorocebus sabaeus in several variants: tissue-specific clocks for brain cortex, blood, and liver; multitissue clock; and human-sabaeus monkey clocks. [40]
The common patas monkey, also known as the hussar monkey, is a ground-dwelling monkey distributed over semi-arid areas of West Africa, and into East Africa.
Simian immunodeficiency virus (SIV) is a species of retrovirus that cause persistent infections in at least 45 species of non-human primates. Based on analysis of strains found in four species of monkeys from Bioko Island, which was isolated from the mainland by rising sea levels about 11,000 years ago, it has been concluded that SIV has been present in monkeys and apes for at least 32,000 years, and probably much longer.
The guenons are Old World monkeys of the genus Cercopithecus. Not all members of this genus have the word "guenon" in their common names; also, because of changes in scientific classification, some monkeys in other genera may have common names that include the word "guenon". Nonetheless, the use of the term guenon for monkeys of this genus is widely accepted.
The Dryas monkey, also known as Salonga monkey, ekele, or inoko, is a little-known species of Old World monkey found only in the Congo Basin, restricted to the left bank of the Congo River. It is now established that the animals that had been classified as Cercopithecus salongo were in fact Dryas monkeys. Some older sources treat the Dryas monkey as a subspecies of the Diana monkey and classify it as C. diana dryas, but it is geographically isolated from any known Diana monkey population.
The vervet monkey, or simply vervet, is an Old World monkey of the family Cercopithecidae native to Africa. The term "vervet" is also used to refer to all the members of the genus Chlorocebus. The five distinct subspecies can be found mostly throughout Southern Africa, as well as some of the eastern countries. These mostly herbivorous monkeys have black faces and grey body hair color, ranging in body length from about 40 cm (16 in) for females, to about 50 cm (20 in) for males.
The grivet is an Old World monkey with long white tufts of hair along the sides of its face. Some authorities consider this and all of the members of the genus Chlorocebus to be a single species, Cercopithecus aethiops. As here defined, the grivet is restricted to Ethiopia, Sudan, Djibouti, and Eritrea. In the southern part of its range, it comes into contact with the closely related vervet monkey and Bale Mountains vervet. Hybridization between them is possible, and may present a threat to the vulnerable Bale Mountains vervet. Unlike that species, the grivet is common and rated as least concern by the IUCN.
The sooty mangabey is an Old World monkey found in forests from Senegal in a margin along the coast down to the Ivory Coast.
Vero cells are a lineage of cells used in cell cultures. The 'Vero' lineage was isolated from kidney epithelial cells extracted from an African green monkey. The lineage was developed on 27 March 1962 by Yasumura and Kawakita at the Chiba University in Chiba, Japan. The original cell line was named Vero after an abbreviation of verdareno, which means 'green kidney' in Esperanto, while vero itself means 'truth' in Esperanto.
L'Hoest's monkey, also known as the mountain monkey, is a guenon found in the upper eastern Congo basin. They mostly live in mountainous forest areas in small, female-dominated groups. They have a dark coat and can be distinguished by a characteristic white beard.
The malbrouck is an Old World primate from Africa that belongs to the genus Chlorocebus. The species is sometimes classified as a subspecies of the vervet monkey, or of the widespread grivet.
Campbell's mona monkey, also known as Campbell's guenon and Campbell's monkey, is a species of primate in the family Cercopithecidae found in the Ivory Coast, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Senegal, and Sierra Leone. It was named for Henry Dundas Campbell, in 1838. Lowe's mona monkey was previously considered a subspecies of Campbell's mona monkey. The International Union for Conservation of Nature has rated this species as being a near-threatened species because it has a wide range and is able to adapt to degraded habitats.
The moustached guenon or moustached monkey is a species of primate in the family Cercopithecidae. It is found in Angola, Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Equatorial Guinea, and Gabon.
The green monkey, also known as the sabaeus monkey, is an Old World monkey with golden-green fur and pale hands and feet. The tip of the tail is golden yellow as are the backs of the thighs and cheek whiskers. It does not have a distinguishing band of fur on the brow, like other Chlorocebus species, and males have a pale blue scrotum. Some authorities consider this and all of the members of the genus Chlorocebus to be a single widespread species, C. aethiops.
The Bale Mountains vervet is a terrestrial Old World monkey endemic to Ethiopia, found in the bamboo forests of the Bale Mountains. All species in Chlorocebus were formerly in the genus Cercopithecus. The Bale Mountains vervet is one of the least-known primates in Africa. They avoid tree-dominated and bushland areas as their habitat. These monkeys mainly reside in the bamboo forest of the Bale Mountains due their dietary specialization on bamboo, but other factors, such as climate, forest history, soil quality, and disease, are likely to play a role in their choice to inhabit this area. The Bale Mountains vervet have a very quiet behavior and tend to flee when encountering a human being. It is also known as the Bale monkey and Bale Mountain grivet.
The tantalus monkey is an Old World monkey from Africa that ranges from Ghana to Sudan. It was originally described as a subspecies of the grivet. All species in Chlorocebus were formerly in the genus Cercopithecus. It is a common species with a wide range, and the International Union for Conservation of Nature has rated its conservation status as being of "least concern".
The agile mangabey is an Old World monkey of the white-eyelid mangabey group found in swampy forests of Central Africa in Equatorial Guinea, Cameroon, Gabon, Central African Republic, Republic of Congo, and DR Congo. Until 1978, it was considered a subspecies of the Tana River mangabey. More recently, the golden-bellied mangabey has been considered a separate species instead of a subspecies of the agile mangabey.
The Vervet Monkey Foundation (VMF) is a 23-hectare not-for-profit centre for rehabilitation, education and sanctuary for vervet monkeys, near the town of Tzaneen, South Africa. Registered and established in 1993, it is situated approximately 80 miles south of the Tropic of Capricorn. The sanctuary is a member of the Pan African Sanctuary Alliance (PASA), and the Global Federation of Animal Sanctuaries (GFAS). The foundation relies heavily on volunteer workers primarily from western countries to assist in the day-to-day running and care duties of the foundation.
Marburg virus (MARV) is a hemorrhagic fever virus of the Filoviridae family of viruses and a member of the species Marburg marburgvirus, genus Marburgvirus. It causes Marburg virus disease in primates, a form of viral hemorrhagic fever. The virus is considered to be extremely dangerous. The World Health Organization (WHO) rates it as a Risk Group 4 Pathogen. In the United States, the National Institute of Allergy and Infectious Diseases ranks it as a Category A Priority Pathogen and the Centers for Disease Control and Prevention lists it as a Category A Bioterrorism Agent. It is also listed as a biological agent for export control by the Australia Group.
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