Eastern chimpanzee

Last updated

Eastern chimpanzee
Gombe Stream NP Mutter und Kind.jpg
A mother with a young at Gombe Stream National Park, Tanzania
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Hominidae
Subfamily: Homininae
Tribe: Hominini
Genus: Pan
Species:
Subspecies:
P. t. schweinfurthii [2]
Trinomial name
Pan troglodytes schweinfurthii [2]
(Giglioli, 1872)
Pan troglodytes schweinfurthii area.png

The eastern chimpanzee (Pan troglodytes schweinfurthii) is a subspecies of the common chimpanzee. It is native to the Central African Republic, South Sudan, the Democratic Republic of the Congo, Uganda, Rwanda, Burundi, and Tanzania. [1]

Contents

Taxonomy

Though it is formally classified as P. t. schweinfurthii, Colin Groves of the Australian National University argues that there is enough variation between the northern and southern populations of this population of chimpanzees to be split into two subspecies instead of one; the northern population as P. t. schweinfurthii and the southern population as P. t. marungensis. [3]

Threats and conservation

The 2007 IUCN Red List classified them as Endangered. [1] Although the common chimpanzee is the most abundant and widespread of the non-human great apes, recent declines in East Africa are expected to continue due to hunting and loss of habitat. Because chimpanzees and humans are physiologically very similar, chimpanzees succumb to many diseases that afflict humans. [4] If not properly managed, research and tourism also present a risk of disease transmission between humans and chimpanzees. This subspecies has been extensively studied by Dr. Jane Goodall at Gombe Stream National Park. [4]

Physical description

Adult chimpanzees in the wild weigh between 40 and 65 kilograms (88 and 143 pounds). Males can measure up to 145 centimetres (57 inches) and females up to 120 centimetres (47 inches) in height. The chimpanzee's body is covered with coarse black hair, except for the face, fingers, toes, palms of the hands, and soles of the feet. Both of its thumbs and its big toes are opposable, allowing a precision grip. Like most chimpanzee populations, the eastern chimpanzees have amber to brown irises and dark sclerae.

Habitat

A nest on a tree where chimpanzees sleep overnight Gombe Stream NP Schlafstelle.jpg
A nest on a tree where chimpanzees sleep overnight

The chimpanzee spends time both in trees and on the ground, but usually sleeps in a[ clarification needed ] tree, where it builds a nest for the night. They once inhabited most of this region, but their habitat has been dramatically reduced in recent years.

Behaviour and ecology

A group of chimpanzees grooming Gombe Stream NP gegenseitiges Lausen.jpg
A group of chimpanzees grooming

Chimpanzees live in communities of typically 20 to more than 150 members, but spend most of their time traveling in small parties of just a few individuals. The eastern chimpanzee is both arboreal and terrestrial and rests in trees at night, but spends the day on the ground. [5]

Chimpanzees walk using the soles of their feet and their knuckles, and they can walk upright for short distances. They are 'knuckle walkers'. [5]

When confronted by a predator, chimpanzees will react with loud screams and use any object they can get against the threat. The leopard is the chimpanzee's main natural predator, but they have also fallen prey to lions. [6]

Diet

Male chimpanzee with its prey, a bushbuck Gombe Stream NP Beute.jpg
Male chimpanzee with its prey, a bushbuck

Chimpanzees are omnivorous and eat seeds, fruits, honey, leaves, bark, fungi, insects such as termites, ants and small prey such as birds and monkeys. They often use a twig as a tool to reach termites or ants in nests and have been seen using sticks to hunt other small mammals. There are also instances of organized hunting. In some cases, such as the killing of leopard cubs, this primarily seems to be a protective effort, since the leopard is the main natural predator of the common chimpanzee. Isolated cases of cannibalism have also been documented.[ citation needed ]

See also

Related Research Articles

<span class="mw-page-title-main">Chimpanzee</span> Great ape native to the forest and savannah of tropical Africa

The chimpanzee, also known as simply the chimp, is a species of great ape native to the forests and savannahs of tropical Africa. It has four confirmed subspecies and a fifth proposed one. When its close relative the bonobo was more commonly known as the pygmy chimpanzee, this species was often called the common chimpanzee or the robust chimpanzee. The chimpanzee and the bonobo are the only species in the genus Pan. Evidence from fossils and DNA sequencing shows that Pan is a sister taxon to the human lineage and is humans' closest living relative. The chimpanzee is covered in coarse black hair, but has a bare face, fingers, toes, palms of the hands, and soles of the feet. It is larger and more robust than the bonobo, weighing 40–70 kg (88–154 lb) for males and 27–50 kg (60–110 lb) for females and standing 150 cm.

<span class="mw-page-title-main">Gorilla</span> Genus of large African apes

Gorillas are herbivorous, predominantly ground-dwelling great apes that inhabit the tropical forests of equatorial Africa. The genus Gorilla is divided into two species: the eastern gorilla and the western gorilla, and either four or five subspecies. The DNA of gorillas is highly similar to that of humans, from 95 to 99% depending on what is included, and they are the next closest living relatives to humans after chimpanzees and bonobos.

<span class="mw-page-title-main">Homininae</span> Subfamily of mammals

Homininae, also called "African hominids" or "African apes", is a subfamily of Hominidae. It includes two tribes, with their extant as well as extinct species: 1) the tribe Hominini ―and 2) the tribe Gorillini (gorillas). Alternatively, the genus Pan is sometimes considered to belong to its own third tribe, Panini. Homininae comprises all hominids that arose after orangutans split from the line of great apes. The Homininae cladogram has three main branches, which lead to gorillas, and to humans and chimpanzees via the tribe Hominini and subtribes Hominina and Panina. There are two living species of Panina and two living species of gorillas, but only one extant human species. Traces of extinct Homo species, including Homo floresiensis have been found with dates as recent as 40,000 years ago. Organisms in this subfamily are described as hominine or hominines.

<span class="mw-page-title-main">Bonobo</span> Species of great ape

The bonobo, also historically called the pygmy chimpanzee, is an endangered great ape and one of the two species making up the genus Pan. While bonobos are, today, recognized as a distinct species in their own right, they were initially thought to be a subspecies of Pan troglodytes, due to the physical similarities between the two species. Taxonomically, the members of the chimpanzee/bonobo subtribe Panina—composed entirely by the genus Pan—are collectively termed panins.

<span class="mw-page-title-main">Jane Goodall</span> English primatologist and anthropologist (born 1934)

Dame Jane Morris Goodall, formerly Baroness Jane van Lawick-Goodall, is an English primatologist and anthropologist. She is considered the world's foremost expert on chimpanzees, after 60 years' studying the social and family interactions of wild chimpanzees. Goodall first went to Gombe Stream National Park in Tanzania to observe its chimpanzees in 1960.

<i>Pan</i> (genus) Genus of African great apes

The genus Pan consists of two extant species: the chimpanzee and the bonobo. Taxonomically, these two ape species are collectively termed panins. The two species were formerly collectively called "chimpanzees" or "chimps"; if bonobos were recognized as a separate group at all, they were referred to as "pygmy" or "gracile chimpanzees". Together with humans, gorillas, and orangutans they are part of the family Hominidae. Native to sub-Saharan Africa, chimpanzees and bonobos are currently both found in the Congo jungle, while only the chimpanzee is also found further north in West Africa. Both species are listed as endangered on the IUCN Red List of Threatened Species, and in 2017 the Convention on Migratory Species selected the chimpanzee for special protection.

<span class="mw-page-title-main">Great ape personhood</span> Extending personhood to nonhuman great apes

Great ape personhood is a movement to extend personhood and some legal protections to the non-human members of the great ape family: bonobos, chimpanzees, gorillas, and orangutans.

<span class="mw-page-title-main">Twycross Zoo</span> English animal park specialising in primates

Twycross Zoo is a medium to large zoo near Norton Juxta Twycross, Leicestershire. The zoo has the largest collection of monkeys and apes in the Western World, and in 2006 re-launched itself as "Twycross Zoo – The World Primate Centre".

<span class="mw-page-title-main">Gombe Stream National Park</span> National park in Tanzania

Gombe Stream National Park is a national park in Kigoma District of Kigoma Region in Tanzania, 16 km (10 mi) north of Kigoma, the capital of Kigoma Region. Established in 1968, it is one of the smallest national parks in Tanzania, with only 35 km2 (13.5 sq mi) of protected land along the hills of the eastern shore of Lake Tanganyika. The terrain is distinguished by steep valleys, and the vegetation ranges from grassland to woodland to tropical rainforest. Accessible only by boat, the park is most famous as the location where Jane Goodall pioneered her behavioural research on the common chimpanzee populations. The Kasakela chimpanzee community, featured in several books and documentaries, lives in Gombe National Park.

The Bili apes, or Bondo mystery apes, were names given in 2003 in sensational reports in the popular media to a purportedly new species of highly aggressive, giant ape supposedly inhabiting the wetlands and savannah around of the village of Bili in the Democratic Republic of the Congo. "The apes nest on the ground like gorillas, but they have a diet and features characteristic of chimpanzees", according to a 2003 National Geographic article.

<span class="mw-page-title-main">Bili Forest</span>

Bili, which is about 200 km east of Bondo and 250 km north of Buta, is a city in the Bas-Uélé District in the northern Democratic Republic of the Congo in Central Africa. It lies along the Bili river, a tributary of the Ubangi river. It lies 50 km south of the Mbomou river, which forms the border with the Central African Republic. It is situated to the north of the Uélé river. The town has existed since at least 1908. It sits on land covered in marshlands, swamps and savannah, with patches of forest, while to the south of the Uélé lies dense unbroken rainforest. The local populace of the greater area are Azande. In 2005, a Time reporter found the region was highly undeveloped due to war and neglect. Bicycles were the main mode of transport at the time. Gold was found in the region, attracting many prospectors in 2006–2007.

<span class="mw-page-title-main">Chimpanzee genome project</span> Effort to determine the DNA sequence of the chimpanzee genome

The Chimpanzee Genome Project was an effort to determine the DNA sequence of the chimpanzee genome. Sequencing began in 2005 and by 2013 twenty-four individual chimpanzees had been sequenced. This project was folded into the Great Ape Genome Project.

<span class="mw-page-title-main">Tool use by non-humans</span>

Tool use by non-humans is a phenomenon in which a non-human animal uses any kind of tool in order to achieve a goal such as acquiring food and water, grooming, combat, defence, communication, recreation or construction. Originally thought to be a skill possessed only by humans, some tool use requires a sophisticated level of cognition. There is considerable discussion about the definition of what constitutes a tool and therefore which behaviours can be considered true examples of tool use. A wide range of animals, including mammals, birds, fish, cephalopods, and insects, are considered to use tools.

<span class="mw-page-title-main">Central chimpanzee</span> Subspecies of ape

The central chimpanzee or the tschego is a subspecies of chimpanzee. It can be found in Central Africa, mostly in Gabon, Cameroon, Republic of Congo and the Democratic Republic of Congo.

<span class="mw-page-title-main">Hominidae</span> Family of primates

The Hominidae, whose members are known as the great apes or hominids, are a taxonomic family of primates that includes eight extant species in four genera: Pongo ; Gorilla ; Pan ; and Homo, of which only modern humans remain.

Primate cognition is the study of the intellectual and behavioral skills of non-human primates, particularly in the fields of psychology, behavioral biology, primatology, and anthropology.

The Kasekela chimpanzee community is a habituated community of wild eastern chimpanzees that lives in Gombe National Park near Lake Tanganyika in Tanzania. The community was the subject of Jane Goodall's pioneering study that began in 1960, and studies have continued ever since, becoming the longest continuous study of any animals in their natural habitat. As a result, the community has been instrumental in the study of chimpanzees and has been popularized in several books and documentaries. The community's popularity was enhanced by Goodall's practice of giving names to the chimpanzees she was observing, in contrast to the typical scientific practice of identifying the subjects by number. Goodall generally used a naming convention in which infants were given names starting with the same letter as their mother, allowing the recognition of matrilineal lines.

<span class="mw-page-title-main">Western chimpanzee</span> Subspecies of chimpanzee

The western chimpanzee or West African chimpanzee is a Critically Endangered subspecies of the common chimpanzee. It inhabits western Africa, specifically Côte d'Ivoire, Guinea, Liberia, Mali, Senegal, Ghana, Guinea-Bissau, but has been extirpated in three countries: Benin, Burkina Faso, and Togo.

Carole Cooney Noon was an American anthropologist and primatologist best known for founding Save the Chimps, a Florida non-profit chimpanzee sanctuary that is the largest such sanctuary in the world as of 2009.

The Mitumba chimpanzee community is a group of wild eastern chimpanzees that inhabit a 10-kilometre-square area of the Gombe Stream National Park, near Lake Tanganyika in Tanzania. This community borders the well-known Kasekela community of chimpanzees. The Mitumba community became well-known following the migration in 1996 of the female chimpanzee Flossi from the Kasekela community, becoming the first identified female chimpanzee to migrate from her natal group. In 2010 the community numbered 25 members. Mitumba males have occasionally been killed by males of the Kasekela community. The Mitumba community's range and size has declined since the 1970s largely as a result of competition with the Kasekela community and due to habitat destruction. Rivalry with Kasekela community in the 1990s and 2000s resulted in several Mitumba chimps being killed by Kasekela males, including the infants Rejea and Andromeda and most likely the adult male Rusambo. During this rivalry, Mitumba males killed the Kasekela adult female Patti.

References

  1. 1 2 3 Plumptre, A.; Hart, J.A.; Hicks, T.C.; Nixon, S.; Piel, A.K. & Pintea, L. (2016). "Pan troglodytes ssp. schweinfurthii". IUCN Red List of Threatened Species . 2016: e.T15937A102329417.
  2. 1 2 Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press. p. 183. ISBN   0-801-88221-4. OCLC   62265494.
  3. Groves, C.P. (2005). "Geographic variation within eastern chimpanzees (Pan troglodytes cf. schweinfurthii Giglioli, 1872)". Australasian Primatology. 17: 19–46.
  4. 1 2 Goodall, J. (1996). McGrew, W.C.; Marchant, L.F.; Nishida T. (eds.). Great Ape Societies. Cambridge: Cambridge University Press. p. xix. ISBN   0-521-55536-1.
  5. 1 2 Janssen, E.; Janssen, P. (2006). "Chimpanzee fact file". African Wildlife Foundation. Archived from the original on 1 November 2019. Retrieved 23 September 2012.
  6. Boesch, C. (1991). "The effects of leopard predation on grouping patterns in forest chimpanzees" (PDF). Behaviour. 1991. 117 (3): 221–242. doi:10.1163/156853991x00544. Archived from the original (PDF) on 2012-09-14. Retrieved 2012-03-02.