The most comprehensive study of Borneo’s orangutans estimates their numbers have plummeted by more than 100,000 since 1999, as the palm oil and paper industries shrink their jungle habitat and fatal conflicts with people increase.
The finding, which is to be published in the journal Current Biology, is in line with the International Union for Conservation of Nature’s (IUCN) 2016 designation of Borneo’s orangutans as critically endangered.
Researchers from the Max Planck Institute for Evolutionary Anthropology and other institutions said the original population of the gentle ginger-haired great apes is larger than previously estimated but so is the rate of decline.
Photo: AP
The most dramatic declines were found in areas where tropical forests were cut down and converted to plantations for palm oil, which is used in a vast array of consumer products, and for timber.
However, significant population declines occurred in selectively logged forests.
“In these forest areas human pressures, such as conflict killing, poaching and the collection of baby orangutans for the pet trade have probably been the major drivers of decline,” the authors of the study said.
Earlier this month, an orangutan on the Indonesian part of Borneo island died after being shot at least 130 times with an air gun, stabbed and clubbed, the second known killing of an orangutan in the Indonesian part of Borneo this year.
Erik Meijaard, a conservationist involved in the study, said current estimates of the orangutan population on Borneo range from 75,000 to 100,000.
He said the estimates vary because of uncertainty about how many animals are living in alien habitats such as plantations and burned forests.
According to the IUCN, their numbers could drop to 47,000 by 2025 from their 2016 population estimate of about 105,000.
The real decline could be worse, because the prediction is based only on habitat loss, and does not include killings.
Sumatra’s orangutan, a separate species, is even more endangered, with a population estimated at about 12,000 animals.
In a positive twist, the new study found Bornean orangutans are more resilient and adaptable than thought.
They walk on the ground more often than previously known and can feed on plants that have not been part of their natural diet.
The authors said this may allow them to survive in smaller forests and in landscapes where the forest is fragmented.
“I expected to see a fairly steep decline, but I did not anticipate it would be this large,” said Ssaid Serge Wich of Liverpool John Moores University, one of the researchers. “When we did the analyses, we ran them again and again to figure out if we had made a mistake somewhere. You think the numbers can’t be that high, but unfortunately they are.”
“The one thing they cannot cope with, however, is the high killing rates seen currently,” he said.
“Orangutans are a very slow breeding species,” he said in a statement. “If only one in 100 adult orangutans is removed from a population per year, this population has a high likeliness to go extinct.”
Additional reporting by The Guardian
A fire caused by a burst gas pipe yesterday spread to several homes and sent a fireball soaring into the sky outside Malaysia’s largest city, injuring more than 100 people. The towering inferno near a gas station in Putra Heights outside Kuala Lumpur was visible for kilometers and lasted for several hours. It happened during a public holiday as Muslims, who are the majority in Malaysia, celebrate the second day of Eid al-Fitr. National oil company Petronas said the fire started at one of its gas pipelines at 8:10am and the affected pipeline was later isolated. Disaster management officials said shutting the
DITCH TACTICS: Kenyan officers were on their way to rescue Haitian police stuck in a ditch suspected to have been deliberately dug by Haitian gang members A Kenyan policeman deployed in Haiti has gone missing after violent gangs attacked a group of officers on a rescue mission, a UN-backed multinational security mission said in a statement yesterday. The Kenyan officers on Tuesday were on their way to rescue Haitian police stuck in a ditch “suspected to have been deliberately dug by gangs,” the statement said, adding that “specialized teams have been deployed” to search for the missing officer. Local media outlets in Haiti reported that the officer had been killed and videos of a lifeless man clothed in Kenyan uniform were shared on social media. Gang violence has left
US Vice President J.D. Vance on Friday accused Denmark of not having done enough to protect Greenland, when he visited the strategically placed and resource-rich Danish territory coveted by US President Donald Trump. Vance made his comment during a trip to the Pituffik Space Base in northwestern Greenland, a visit viewed by Copenhagen and Nuuk as a provocation. “Our message to Denmark is very simple: You have not done a good job by the people of Greenland,” Vance told a news conference. “You have under-invested in the people of Greenland, and you have under-invested in the security architecture of this
Japan unveiled a plan on Thursday to evacuate around 120,000 residents and tourists from its southern islets near Taiwan within six days in the event of an “emergency”. The plan was put together as “the security situation surrounding our nation grows severe” and with an “emergency” in mind, the government’s crisis management office said. Exactly what that emergency might be was left unspecified in the plan but it envisages the evacuation of around 120,000 people in five Japanese islets close to Taiwan. China claims Taiwan as part of its territory and has stepped up military pressure in recent years, including