A scientist from the Japanese Institute of Primate research at Kyoto University Hanjin Ryu and his colleagues, observing the process of grooming (e.g. cleaning) among Bonobo apes (chimpanzees the family of hominids, or pygmy chimpanzee) living in conditions of wild nature, found that monkeys with age, like people, can suffer from hyperopia. Moreover, for 40 years, almost all individuals lose visual acuity.

According to the report published on the website of the British scientific journal Current Biology, in humans and in monkeys, the cause of hyperopia – reducing the refractive power of the lens of the eye. According to Professor Ryu, this suggests that aging eyes have not changed much since the common ancestor of humans and monkeys, despite the fact that the lifespan of modern humans is much longer than that of chimpanzees and bonobos.

The study was conducted in the Democratic Republic of the Congo. Watching the bonobos population, consisting of 14 individuals, aged 11 to 45 years, scientists the part of the apes was filmed, the part photographed. Analysis of the data showed that since 40 years the behavior of chimpanzees during mutual cleaning (grooming) changes: they reach out further than the juveniles, although the distance to their partners the same in both cases. Measuring the distance that a chimpanzee pulls the hand showed that it increases with age exponentially (the older the individual, the greater the distance). In this case, if the second monkey moves to his old partner, he moves away from her and only then continue grooming. From the outside it looks like an elderly monkey can’t focus too close object: like all farsighted people. The vision evolved in animals regardless of whether they looked often on the screens of the gadgets that they were given or not.

Thus, scientists have concluded that hyperopia like apes, and humans is not the result of eye strain in the use of gadgets, and the natural aging process. A group of scientists led by Professor Ryu will continue the study of aging in bonobos.

Scientists have repeatedly drawn attention to the similarity of the reactions of apes, bonobos and humans. So, in 2007, American researchers, highlighting more than 30 communicative gestures in monkeys, found that they do not differ much from the gestures of the people. Another study conducted in 2006, revealed a similarity in the behavior of bonobos and of people of different sexual orientation. It turned out that, being naturally good-natured, and considering the sex as the panacea for all ills, they live in the matriarchy.

Described scientifically as a separate species in 1929, bonobos have been known for a long time. Mainly Africans (bonobos live in the tropical forests of Central Africa in a small area between the rivers of the Congo and called the Lualaba). For them, the pygmy chimpanzee – heroes of ancient legends. According to one, the bonobos have taught people to determine what foods you can eat without fear.

It is believed that the species of pygmy monkeys opened the German anatomist Ernst Schwarz. Studying the skeleton of a rare monkey, kept in a Belgian colonial Museum, he realized that he sees before him not the skull of a baby, and the skull of an adult chimpanzee, and announced a new subspecies. Later scientists have proved that we are talking about a new species of great apes. In 1954 the German primatologia Eduard Tratz and Heinz heck reported on their observations on the mating practices of bonobos. Their reports encrypted in the Latin terminology, then, the General public is not reached. Only in the 1970-ies, when morals have become tolerant of sexual themes, the researchers drew on bonobos more attention.

Bonobo monkey proved that gadgets and reading does not affect the development of hyperopia in people 08.11.2016

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