They feed a vast range of species from orangutans and sun bears, to fish when they are dropped in the water. and Other significant (though estimated) populations are found in the following regions: Central Kalimantan (estimated at over 31,300), West Kalimantan and Sarawak (7,425), and East Kalimantan (4,8… Last week, authorities on Borneo found the body of a male orangutan bearing machete scars and wounds from 130 airgun pellets. The number of species within the Bornean rainforest is exceeding great, and still growing with new species being found regularly. Writing in the journal Current Biology, the team describe how the decline in nests from 1999 to 2015 points to the staggering loss of 148,500 orangutans in Borneo. "We found that around 70% of the total loss occurs in primary forest areas or selectively logged forests, so the only explanation is that they are being hunted by people," said Serge Wich, a scientist in the team from the Liverpool John Moores University. (CNN)The number of orangutans on the island of Borneo has more than halved in 16 years, as hunting of the critically endangered species continues and rampant deforestation destroys its habitat, scientists say. This is c. 40–45% of the original population, and the fragmented population is unlikely to be viable in terms of long-term demographic and genetic stability. Its authors concluded that the Bornean orangutan population had fallen by 148,000 between 1999 and 2015 and now stands at between 70,000 and 100,000 individuals. Some of them because of climate changes over the past millennia but most of them because of human activities. A T. Rex Sold for $31.8 Million, and Paleontologists Are Worried, Nero, History's Most Despised Emperor, Gets a Makeover. This also affected the plant species which are key food sources for many animals within the rainforest. Find out more about sending to your Kindle. Sie klettern langsam mit allen vier Gliedmaßen oder schwingen auf den Ästen. machete scars and wounds from 130 airgun pellets. Orangutans are known to commonly eat fig fruits which are distributed around the forests of Borneo (Hance, 2010). 2019. Another major issue with the loss of rainforest areas is how they naturally absorb a fifth of all man-made CO2 emissions, and when forestry areas are destroyed, these emissions are released back into the air, later creating secondary issues and pollution (Chester Zoo, 2015). Find out more about sending content to Google Drive. Researchers estimate that the number of orangutans left on Borneo now stands at between 70,000 and 100,000, meaning the population more … The area of a failed agricultural project known as the Mega Rice Project in Central Kalimantan, Indonesia, is composed of fragments of peat-swamp forest that are reported to contain orang-utans, although no comprehensive survey has previously been conducted. Der Borneo-Orang-Utan (Pongo pygmaeus) ist eine Menschenaffenart. Hunters also kill orangutans to use as food, adds Sample. Männchen und Weibchen versuchen, feste Territorien zu etablieren, insbesondere jüngere Tiere verbringen ihr Leben aber als „Wanderer“, die ohne Revier ständig umherstreifen. Hinzu kommen die Bejagung und der illegale Handel mit Jungtieren, die als Haustiere gehalten werden. Continue 2018. Males usually tend to disperse further than females when they are mature and will spend a lot of their time solitary until their want to find a mate. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply. Further evidence of the population's decline came in a report published in the journal Biology in February this year. View all Google Scholar citations The reason for the patchy distribution throughout the Island of Borneo is due to the random spots where deforestation has been undertaken. Orangutans are the today’s largest arboreal mammals and they are semi-solitary animals, although they live along a very complex social network where they maintain loose relationships with other members of the community. “I expected to see a fairly steep decline, but I did not anticipate it would be this large,” said Serge Wich, a co-author on the report at Liverpool John Moores University. Actually, many populations of orangutans have already disappeared in Borneo. 2006). The bleak assessment of the state of the Bornean apes comes from an international team of conservationists who compiled one of the most comprehensive reports yet on the animals, which in 2016 were declared “critically endangered” by the International Union for Conservation of Nature (IUCN). Fig fruits which are one the main food sources for many animal species within the Bornean rainforest, meaning that scarcity can leave behind serious consequences for animals. Diese Seite wurde zuletzt am 1. When you lost the habitat, it’s gone forever, but the forests are still there. According to The Guardian’s Ian Sample, orangutan populations in areas affected by deforestation fell by up to 75 percent. According to the IUCN Red List, the total Bornean orangutan population is between 45,000 and 69,000 individuals. Borneo-Orang-Utans sind tagaktive Waldbewohner, zur Nachtruhe errichten sie ein Blätternest, das in der Regel nur einmal verwendet wird. Still, there is an urgent need to prevent deaths. The researchers estimated orangutan numbers by tracking the animals’ nests and comparing these figures to historical data on land-use. California Do Not Sell My Info Human conflict is another major influence on the distribution on the Bornean Orangutan. Sharma et al (2012) also suggests that the recent loss of habitat and fragmentation has reduces the ability of genetic variability and differentiation among the remaining populations, creating a higher chance of extinction.