World's primates facing extinction crisis, new report says

Gorillas, monkeys, lemurs and other primates are in danger of becoming extinct, and scientists say it's our fault our closest living relatives are in trouble, a new international study warns.

About 60 per cent of the more than 500 primate species are "now threatened with extinction" and three out of fourprimate species have shrinking populations, according to a study publishedWednesday in thejournal Science Advances.

This is a critical world problem.- Researcher PaulGarber

While scientists had tracked dwindling numbers of individuals and groups of primates in forests around the world, this is the first big-picture look. The result was "a bigger wake-up call" than previously thought, said researcher Paul Garber of the University of Illinois.

"The outlook is not very good," said Garber, who recently returned from studying marmosets in the jungles of Brazil..

Primate problems are recent

The decline has been blamed on human activities including hunting, mining and oil drilling. Logging, ranching and farming have also destroyed precious habitat in Africa, Asia and South America.

Primates, which include apes, monkeys and humans, have forward-facing eyes and grasping ability that set them apart from other mammals. Scientists study them to learn about human behaviour and evolution.

Manyof the problems faced by primates are recent. For example, the Grauer's gorilla dropped from a population of 17,000 in 1995 to just about 3,800 now, mostly from bushmeat hunting and mineral mining, the study found.

There are only about 14,000 Sumatran orangutans left in the world. The Hainan gibbon in China is down to just 25 individuals, while 22 out of the 26 primate species in China are endangered, Garber said.

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About 94 per cent of the lemur species in the world are endangered.

"We need to look at [population losses]almost as signals. They're telling us something about our future," Garber said. "This is a critical world problem."

While there's hope that some species can be protected, many will disappear in the coming decades, said co-author Eduardo Fernandez-Duque of Yale University.

Emory University primate expert Frans de Waal,who wasn't part of the study, called the work "very detailed and timely and unfortunately correct."

"Primate populations are clearly moving in the wrong direction," he said.