Featured Research

from universities, journals, and other organizations

Proboscis monkeys regurgitating their food, like cows

Date:
May 21, 2011
Source:
University of Zurich
Summary:
A previously unknown behavior pattern is only observed in a large animal very rarely – which is why new videos are nothing short of a sensation: They show proboscis monkeys regurgitating, chewing and gulping back down food they’ve swallowed – just like ruminating cows.

A proboscis monkey regurgitating, chewing and gulping back down food -- just like a ruminating cow.
Credit: Image courtesy of University of Zurich

A previously unknown behavior pattern is only observed in a large animal very rarely -- which is why the videos researchers have published for an article in Biology Letters are nothing short of a sensation: They show proboscis monkeys regurgitating, chewing and gulping back down food they've swallowed -- just like ruminating cows.

For Marcus Clauss, co-author of this Japanese study, these observations were sensational. He has been researching herbivores with a foregut-fermenting digestive system at the University of Zurich for many years; proboscis monkeys belong to this group of 'foregut fermenters', along with hippopotamuses, sloths, kangaroos and cows.

Unlike herbivores such as horses, rhinoceroses, rabbits and many other species of monkey, foregut fermenters have trouble digesting plant fiber in the colon: Their digestive system can't cope if too much food is ingested as the digesta passes through the foregut too quickly. In other words, they're condemned to cautious eating. Colon fermenters don't have that problem, however. These include species with a large food intake such as elephants or a low food intake like koala bears.

According to Clauss, only ruminants -- namely cows, buffaloes, deer, antelope, giraffes and camels -- have found a solution to the foregut problem. As they reduce the size of the digesta intensively, they can afford to ingest more food. And the proboscis monkey observations seem to support precisely this theory. They reveal that on the whole the monkeys eat longer and therefore presumably more on days when they display ruminant-like behavior than on other days.

So far, this behavior has only been observed in proboscis monkeys from a particular region in Malaysia. Whether this is a regional tradition or all proboscis monkeys display this behavior and it has just gone unnoticed thus far remains unclear.

Video available here.


Story Source:

The above story is based on materials provided by University of Zurich. Note: Materials may be edited for content and length.


Journal Reference:

  1. Ikki Matsuda, Tadahiro Murai, Marcus Clauss, Tomomi Yamada, Augustine Tuuga, Henry Bernard and Seigo Higashi. Regurgitation and remastication in the foregut-fermenting proboscis monkey (Nasalis larvatus). Biology Letters, 2011 DOI: 10.1098/rsbl.2011.0197

Cite This Page:

University of Zurich. "Proboscis monkeys regurgitating their food, like cows." ScienceDaily. ScienceDaily, 21 May 2011. <www.sciencedaily.com/releases/2011/03/110330094355.htm>.
University of Zurich. (2011, May 21). Proboscis monkeys regurgitating their food, like cows. ScienceDaily. Retrieved July 24, 2014 from www.sciencedaily.com/releases/2011/03/110330094355.htm
University of Zurich. "Proboscis monkeys regurgitating their food, like cows." ScienceDaily. www.sciencedaily.com/releases/2011/03/110330094355.htm (accessed July 24, 2014).

Share This




More Plants & Animals News

Thursday, July 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Boy Attacked by Shark in Florida

Boy Attacked by Shark in Florida

Reuters - US Online Video (July 24, 2014) An 8-year-old boy is bitten in the leg by a shark while vacationing at a Florida beach. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Goma Cheese Brings Whiff of New Hope to DRC

Goma Cheese Brings Whiff of New Hope to DRC

Reuters - Business Video Online (July 24, 2014) The eastern region of the Democratic Republic of Congo, mainly known for conflict and instability, is an unlikely place for the production of fine cheese. But a farm in the village of Masisi, in North Kivu is slowly transforming perceptions of the area. Known simply as Goma cheese, the Congolese version of Dutch gouda has gained popularity through out the region. Ciara Sutton reports. Video provided by Reuters
Powered by NewsLook.com
Dogs Appear To Become Jealous Of Owners' Attention

Dogs Appear To Become Jealous Of Owners' Attention

Newsy (July 23, 2014) A U.C. San Diego researcher says jealousy isn't just a human trait, and dogs aren't the best at sharing the attention of humans with other dogs. Video provided by Newsy
Powered by NewsLook.com
Professor Creates Site Revealing Where People's Cats Live

Professor Creates Site Revealing Where People's Cats Live

Newsy (July 23, 2014) ​It's called I Know Where Your Cat Lives, and you can keep hitting the "Random Cat" button to find more real cats all over the world. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

    Health News

      Environment News

        Technology News



          Save/Print:
          Share:

          Free Subscriptions


          Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

          Get Social & Mobile


          Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

          Have Feedback?


          Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
          Mobile: iPhone Android Web
          Follow: Facebook Twitter Google+
          Subscribe: RSS Feeds Email Newsletters
          Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins