Sentences with phrase «by wild chimpanzees»

Not exact matches

The finding was bad enough: During the last two decades, the population of wild chimpanzees and gorillas in the West African nations of Gabon and the Republic of the Congo has declined by more than half.

A team of primatologists headed by Kevin Langergraber of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, pulled together behavioural data on nine wild chimpanzee groups, and analysed DNA samples from 246 individual apes.

Thirty - five years ago, researchers studying chimpanzees in the wild noticed that neighboring communities had distinct grooming behaviors that could not be explained by differences in their environments.

By GAIL VINES In 1960, Adriaan Kortlandt became the first animal behaviourist to gaze into the eyes of wild chimpanzees.

Teleki calculates that for every infant that survives a year at the final overseas destination, 10 chimpanzees die in transit or on arrival, or are killed in the wild by poachers — small wonder that conservationists are alarmed at the impact continued commercial exploitation will have on wild populations whose habitats are being progressively destroyed.

Since Christophe Boesch began studying wild chimpanzees in the Taï forest in Côte d'Ivoire in 1979, the animals» populations have declined by more than two - thirds.

Human researchers are killing wild chimpanzees by inadvertently giving them colds, a new study shows for the first time.

The distribution of chimpanzee cultural behaviors in the wild may therefore be strongly affected by the identity and social characteristics of the original inventors.

The Dutch photographer and filmmaker Hugo van Lawick was sent to document Jane Goodall's first establishment of contact with the chimpanzee population, resulting in the enormously popular Miss Goodall and the Wild Chimpanzees, the second film ever produced by National Geographic.