For the first time in Malaysia, the scientists found the monkey, the digestive system which operates similar to that of a cow - Nosach or proboscis monkey spit up swallowed food to the mouth for further chewing as well as do ruminants.
Cows, goats, sheep and other ruminants differ complex digestive system: they are short-lived plants are chewed, swallowing them, and have already taken the basic process of decomposition occurs in the stomach of food, there food is mitigated to a certain consistency. Then the animals regurgitate small amounts of processed foods in their mouths to pursue a more thorough chewing. This helps them gum pulverize food and thus obtain, all of the nutrients therein.
Primates such as, for example, humans and monkeys seemed to cover the whole range of dietary strategies observed in the animal kingdom, including the chewing. But now scientists have found a big-nosed monkey or kaha (Nasalis larvatus) on the island of Borneo, which is likely to chew the processed foods, as well as members of the family of artiodactyls.
The researchers used a video camera and binoculars to watch the 200 Nosach who lived by eating fruits and leaves that grow along the tributary of Kinabatangan River in Malaysia (Sabah). These primates have such names because of the large noses specific to males that they are reputed scientists use to attract females.
One of the researchers and a primatologist at Kyoto University in Japan, Ikki Matsuda (Ikki Matsuda) told LiveScience agency as follows: "There is certainly a lot of obstacles on the way to the study of unusual animal behavior. Forest full of mosquitoes and leeches. Due to the strong rainy season river water reaches waist level, even in the woods. "
"It was really scary, because it’s a time when crocodiles come inside the forest, and a host of other creatures like centipedes and spiders approached me in the water" - said Matsuda.
The researchers saw 23 monkeys chewed his vomit food, at least once. It was noted that the monkeys stick out their tongues before they vomit processed food, keeping it in his mouth. Scientists are continuously watched by one adult male Kahan for 169 days, watching as he srygivaya, chewed processed foods for 11 days. This chewing process usually happens when Nosach spent more time on the food, suggesting that regurgitation help the monkey to digest food faster and may thus help to eat more.
There are cases where gorillas and even vomit people chew food, but it is considered as a pathological behavior. At the same Nosach quite the contrary it is a part of a healthy diet. Future research will, in the words of Marcus Clauss (Marcus Clauss), a physiologist at the University of wildlife Zuriha in Switzerland, will help to study independently of other apes, such as langurs or langurs, which are also ruminants.
The scientists describe in detail its findings in the online version of the March issue of the journal "Biology Letters".
Original: LiveScience Translation: M. Potter