Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Baboons in Mourning Seek Comfort Among Friends

31.01.2006


When Sylvia the baboon lost Sierra, her closest grooming partner and daughter, to a lion, she responded in a way that would be considered very human-like: she looked to friends for support. According to researchers from the University of Pennsylvania, baboons physiologically respond to bereavement in ways similar to humans, with an increase in stress hormones called glucocorticoids. Baboons can lower their glucocorticoid levels through friendly social contact, expanding their social network after the loss of specific close companions.


Sylvia grooms Sierra’s cheek



"At the time of Sierra’s death, we considered Sylvia to be the queen of mean. She is a very high-ranking, 23 year-old monkey who was, at best, disdainful of females other than Sierra," said Anne Engh, a postdoctoral researcher in Penn’s Department of Biology. "With Sierra gone, Sylvia experienced what could only really be described as depression, corresponding with an increase in her glucocorticoid levels."

Engh works with Penn biologist Dorothy Cheney and Robert Seyfarth, a professor in Penn’s Department of Psychology. For the last 14 years, Cheney and Seyfarth have followed a troop of more than 80 free-ranging baboons in the Okavango Delta of Botswana. Their research explores the mechanisms that might be the basis of primate social relationships and how such relationships may have influenced the development of human social relationships, intelligence and language.


To study the response of stress among baboons, Engh and her colleagues examined the glucocorticoid levels and grooming behavior of females in the troop to see how closely they resemble patterns seen in humans. Their findings were published in a recent article in the Proceedings of the Royal Society of Biological Sciences.

Grooming, a friendly behavior where baboons clean each other’s fur, is the primary means by which baboons strengthen social bonds. According to Engh, while the death of a close family member was clearly stressful over the short term, the females they studied appeared to compensate for this loss by broadening and strengthening their grooming networks. As they resumed grooming, their glucocorticoid levels returned to normal.

" Without Sierra, Sylvia really had nobody else," Engh said. "So great was her need for social bonding that Sylvia began grooming with a female of a much lower status, behavior that would otherwise be beneath her."

Through her study, Engh was able to track patterns in stress of the female baboons over time through their glucocorticoid levels. Their stress levels increased most often during events when their lives, the lives of their offspring and their social rankings were at risk. The leading cause of death among adult baboons is predation, usually from leopards and lions. The stress levels of female baboons increased most noticeably when a predator killed a close companion, such as a grooming partner or offspring. If they merely witness another baboon die they do not become as agitated.

"Our findings do not necessarily suggest that baboons experience grief like humans do, but they do offer evidence of the importance of social bonds amongst baboons," Engh said. "Like humans, baboons seem to rely on friendly relationships to help them cope with stressful situations."

Engh’s research was funded by grants from the National Institutes of Health. Co-authors on the paper include Jacinta Beehner, Thore Bergman, Dorothy Cheney and Robert Seyfarth from Penn; Patricia Whitten from Emory University; and Rebekah Hoffmeier of the Moremi Baboon Project in Botswana.

Greg Lester | EurekAlert!
Further information:
http://www.upenn.edu

More articles from Life Sciences:

nachricht Designer cells: artificial enzyme can activate a gene switch
22.05.2018 | Universität Basel

nachricht Flow of cerebrospinal fluid regulates neural stem cell division
22.05.2018 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Designer cells: artificial enzyme can activate a gene switch

22.05.2018 | Life Sciences

PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target

22.05.2018 | Earth Sciences

Achema 2018: New camera system monitors distillation and helps save energy

22.05.2018 | Trade Fair News

VideoLinks
Science & Research
Overview of more VideoLinks >>>