Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

First video of ‘remasticating’ proboscis monkeys

30.03.2011
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.


‘remasticating’ proboscis monkey

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.

References:

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

Contacts:

Dr. Marcus Clauss
University of Zurich, Vetsuisse Faculty
Tel. ++41 44 635 83 76
E-Mail: mclauss@vetclinics.uzh.ch

Beat Müller | Universität Zürich
Further information:
http://www.mediadesk.uzh.ch

More articles from Life Sciences:

nachricht Bolstering fat cells offers potential new leukemia treatment
17.10.2017 | McMaster University

nachricht Ocean atmosphere rife with microbes
17.10.2017 | King Abdullah University of Science & Technology (KAUST)

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Ocean atmosphere rife with microbes

17.10.2017 | Life Sciences

Neutrons observe vitamin B6-dependent enzyme activity useful for drug development

17.10.2017 | Life Sciences

NASA finds newly formed tropical storm lan over open waters

17.10.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>