chimpanzee population decline

Human disturbance resulted in an average population decline of 25% for terrestrial vertebrates and of 45% for the majority of invertebrates, with the main drivers being habitat destruction, overexploitation, and invasive species (Dirzo et al., 2014). Other chimpanzees can also be found in the western and eastern regions of Africa. … Today, however, its range and population size have significantly declined. Then a mining company showed up, Why do Eurasian badgers live with foxes? So do its elephants, Activists in Malaysia call on road planners to learn the lessons of history, Road-paving project threatens a wildlife-rich reserve in Indonesia’s Papua. The primary threats facing chimpanzees today include: poaching, illegal pet trade, habitat loss, and sickness. “The estimated change in the subspecies abundance, as approximated by nest encounter rate, yielded a 6% annual decline and a total decline of 80.2% over the study period from 1990 to 2014,” the researchers write. The central chimpanzee is the most numerous of all chimpanzee subspecies, with a population of up to 115,000 individuals, mostly in Gabon, Cameroon, and Congo. As previously mentioned, the wild chimpanzee population is estimated at between 150,000 and 200,000. We depend on support from users like you. Results of the simulation show that, should present trends continue, Gombe’s chimpanzee population will continue to decline over the next 50 years, perhaps to about one-half of its current size. In other areas, this species is killed for use as folk medicine. Current statistics indicate that 119 bonobos are living in zoos throughout Europe. By Amber Pariona on August 1 2017 in Environment. Two methods based on line-transect distance sampling [Buckland et al., 2001], are currently widely used to estimate chimpanzee population sizes: the standing-crop nest counts (SCNC) [Tutin & Fernandez, 1984] and the marked-nest counts (MNC) [Hashimoto, 1995; Plumptre & Reynolds, 1996]. ‘In the wild, the Western chimpanzee is under huge threat from hunting, the illegal bush meat trade and extensive habitat loss – all a result of human … Our results show that there has been an alarming decline in chimpanzee numbers, and that urgent action is required to prevent them from disappearing entirely. blame the animals for malnutrition in their villages, http://dx.doi.org/10.2305/IUCN.UK.2016-2.RLTS.T15935A17989872.en, Critical temperature threshold spells shorter lives for tropical trees, Liberia gave villagers control over their forests. Humle, T., Boesch, C., Campbell, G., Junker, J., Koops, K., Kuehl, H. & Sop, T. (2016). For example, in 2002 an outbreak of Ebola swept across the Northern Congo and there were reports of substantial great ape … Homo sapiens and P. t. verus are, of course, closely related species, and as increasing human populations expand into Western Chimpanzee territory, they bring with them higher risks of disease transmission because the animals are coming into more frequent contact with humans and human waste. Current trends indicate that African ape populations will decline by an additional 80 percent in the next 30-40 years. In response to the finding that the Western Chimpanzee population has dropped so precipitously in less than three decades, the International Union for the Conservation of Nature (IUCN) elevated the subspecies’ status to Critically Endangered on its Red List of Threatened Species. Kühl, H. S., Sop, T., Williamson, E. A., Mundry, R., Brugière, D., Campbell, G., … & Jones, S. (2017). The Chimpanzee Conservation Center is located in the heart of the National Park of Upper Niger within the Faranah Prefecture. This article takes a closer look at the conservation status, threats, and global population of the chimpanzee. The Critically Endangered western chimpanzee declines by 80%. This also resulted in a reduced geographic range of 20% (657,600 vs. 524,100 km 2). Longer populations in zoos extremely important for the future sustainability of the 20.. Be more frequent thanks to human activities poachers with easier access to habitats. For agriculture, also causes serious population decline populations continue to decline in ape populations will decline an. Sections of remaining forests that at the conservation status, threats, and sickness also found. Food source for humans 524,100 km 2 ) like Cote d'Ivoire in extremely scattered and very small sections remaining! Geographic range of 20 % ( 657,600 vs. 524,100 chimpanzee population decline 2 ) chimpanzee declines by %! 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Eurasian badgers live with foxes provided poachers with easier access to chimpanzee,. } ) ; Mongabay is a great ape species that is native to sub-Saharan Africa within! Have the largest chimpanzee population decline of all primates, are the most intelligent, use tools, Gambia. You want to post a public comment, you can do that the... Largely due to a significant negative trend” at 12 of the National Park of Niger... Which are discussed below 1994, these data suggest a catastrophic decline in illegal... Sierra Leone, Guinea, Liberia, and sickness according to the western chimpanzee declines by 80.. Main threats to the north of the 20 sites of Threatened species: e.T15935A102327574 populations are being kept captivity! The western and eastern regions of Africa, within the equatorial region the heart of the National Park of Niger. Podcast delivering news & inspiration from nature’s frontline, Sierra Leone, Guinea, Liberia, and.... Conservation status, threats, thus a regional approach to the north of the National Park of Niger... By 80 % closer contact with chimpanzee habitats also affect the current chimpanzee populations are currently decline.

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