Chimpanzees prefer to focus on fewer friends as they age, study suggests

24 Octobre, 2020, 22:58 | Auteur: Anatole Charbonneau
  • Chimpanzees prefer to focus on fewer friends as they age, study suggests

The study shows what can be the first evidence of non-human animals actively selecting whom they relate to during aging. According to an idea in psychology known as the socio-emotional selective theory, or SST, older adults prefer more positive relationships because they realize that time is running out.

The team produced three categories: mutual friends, who both showed a preference for sitting with each other, one-sided friends where only one party showed a preference but the other did not, and non-friends where neither side preferred each other.

"What is really cool is that we found that chimpanzees are showing these patterns that reflect those of humans", said Alexandra Rosati, assistant professor of psychology and anthropology at the University of MI and one of the article's main authors.

Older males were also more likely to spend more time alone but interacted with more important social partners, like their aging mutual friends.

They found that the animals displayed much of the same behaviour ageing humans exhibit.

According to Machanda, the results - published in the journal Science - show that a sense of future time is not necessary for social circles to shrink with age, and that other factors may support behavior in humans and chimpanzees. They then rated the various pairs as mutual friendships, where both shimps seem to have enjoyed the relationship; One-sided friendship, where one shimp was more interested in being a friend than the other; And friendshiplessness, where chimps both show no interest in the other.

"There's really a pressing need to understand the biology of aging", Rosati said.

"More humans are living longer than in the past, which can change the dynamics of ageing". This holds that people prioritise established relationships as they grow older due to their own impending sense of mortality and the desire to make the best of available time.

Pakistan condemns in strongest possible terms terrorist attack at Kabul education centre
Militant group Daesh claimed responsibility for the bombing, in a statement on Telegram, without providing evidence. Sirat added that the bombings had wounded several others, and that the attacks were under investigation.

Trump casts early ballot in Florida in presidential election
The latest polling data from Florida shows the race is very close, with a Rasmussen poll showing Trump up by four points, and St. After voting, President Trump was scheduled to depart Florida for rallies Saturday in North Carolina and Ohio.

Ontario reports 841 new COVID-19 cases, another hospital outbreak
The majority of cases were found in Ontario's four COVID-19 hotspots, which are now in a modified Stage 2. Ontario has completed more than 4.8 million tests for the disease since the beginning of the pandemic.

The study's co-authors are Lindsey Hagberg and Richard Wrangham, researchers at Harvard University; Drew Enigk, Melissa Emery Thompson and Martin Muller, researchers at the University of New Mexico; and Emily Otali, field director of the Kibale Chimpanzee Project.

The observations left the researchers baffled.

Or as Machanda said: "They can be very happy together".

To study their affinities for one another, the team developed an "association index" that was based on how often a male within a party was in close proximity (under five meters) to another, relative to how much they associated with all group members. These are categorized as mutual friendships while one-sided friendships are when one chimp prefers sitting close to another chimp but that other chimp doesn't share that habit.

There is more to aging than just gray hair and wrinkled skin. "When you have this kind of mutual friendship, you actually groom that individual more, so these older chimps have these mutual friendships and they're actually grooming those individuals quite a bit".

The scientists weren't entirely surprised by their findings. "We know that as humans age, their social networks shrink but their social bonds get stronger, and we see the same thing here in chimpanzees".

Another feature seen in older people was also seen in beans.

Prof Wranham added: "It raises the possibility that we are seeing behavioural systems that have been shared evolutionarily back to our common ancestor around seven or eight million years ago".


  • Microsoft teases TV streaming stick for playing Xbox games

    Microsoft teases TV streaming stick for playing Xbox games

    Spencer has been talking up the idea of moving beyond the traditional Xbox console ecosystem for some time, repeatedly espousing a games-first approach.
    HSBC tapped for first Hong Kong ETFs under cross-listing scheme

    HSBC tapped for first Hong Kong ETFs under cross-listing scheme

    The British offer is not for all residents of Hong Kong, but only those holding a British National Overseas (BNO) passport. The spokesman emphasized that Hong Kong is a part of China, and therefore its affairs are China's internal affairs.
    France to extend nighttime curfews to more regions: PM

    France to extend nighttime curfews to more regions: PM

    The number of cases increased by 40 percent over the past week, while the number of infections has been doubling every 15 days. Figures showed France nearing 1 million confirmed cases since the start of the pandemic, with 999,043 as of Thursday evening.
  • Utah gubernatorial candidates appear in joint ads promoting unity

    Utah gubernatorial candidates appear in joint ads promoting unity

    Added one other: "Wow, I'm transferring to Utah simply due to this message by Peterson and Cox". "I'm Chris Peterson ", Peterson says, "and I'm Spencer Cox ", Says Cox.
    L1 : 11 joueurs positifs, Lens-Nantes reporté

    L1 : 11 joueurs positifs, Lens-Nantes reporté

    Les Sang et Or comptaient pourtant sur cette rencontre pour relever la tête après leur défaite face au LOSC le 18 octobre. Onze joueurs lensois auraient en effet été diagnostiqués positifs, ainsi que l'entraîneur Franck Aise.
    53,370 new cases take India's Covid-19 tally to 78,14,682

    53,370 new cases take India's Covid-19 tally to 78,14,682

    This week's new COVID-19 cases account for 11% of all cases identified in the county since the beginning of the pandemic. There were eight deaths among suburban COVID-19 patients this week, down from last week when the board reported 12.
  • 'Fast & Furious' Will End After Two More Films

    'Fast & Furious' Will End After Two More Films

    However, they need not be disappointed because some spinoff versions of the franchise are in the works. In 2019, producer Hiram Garcia, and in 2020, Dwayne Johnson have confirmed a "Hobbs & Shaw" sequel.
    NBA Targets 72-Game Season, Beginning Dec. 22

    NBA Targets 72-Game Season, Beginning Dec. 22

    There were 171 games canceled this season by the coronavirus, which caused the league to suspend operations on March 11. Typically, a mid-June end to the finals is followed by about a 3 1/2-month break before the following training camp.
    Ça se corse pour Boudebouz — ASSE

    Ça se corse pour Boudebouz — ASSE

    En effet, d'après les informations de L'Equipe , le milieu de terrain de 30 ans s'est envolé pour Doha, ce mardi après-midi. L'international algérien est officiellement de retour dans le groupe professionnel comme l'a indiqué le coach stéphanois.
  • Quebec City health network ‘on brink of service breakdown,’ says deputy premier

    Quebec City health network ‘on brink of service breakdown,’ says deputy premier

    Authorities say only five of those deaths occurred within the past 24 hours, with most from between October 17 and October 22. "The healthcare system might not be able to take care of you anymore in certain cases", she said in French from Quebec City.
    U.S.  dollar drifts as markets look for certainty on United States  stimulus

    U.S. dollar drifts as markets look for certainty on United States stimulus

    The US dollar was firmer against Japan's currency at 104.73 yen, above a one-month low hit during the previous session at 104.345. The euro edged 0.16% lower against the USA dollar to US$1.8420, a fraction below a one-month high of US$1.8805 hit on Wednesday.
    ‘I voted for a guy named Trump,’ says US President

    ‘I voted for a guy named Trump,’ says US President

    United States President Donald Trump on Saturday voted early in person for the presidential elections, in Florida, AFP reported . President Donald Trump talks with reporters after casting his ballot in the presidential election in West Palm Beach, Fla.


Arrests at Melbourne anti-lockdown rally
The out-of-control crowd has transformed into a rally, with protesters moving towards the Arts Centre while shouting " freedom ". Mr Andrews urged protesters on Friday morning not to attend the Shrine because it was a sacred place for Victorians.

Bride: Scarlett Johansson to Star in Frankenstein Story for Apple & A24
On top of starring, Johansson is also set to serve as a producer along with Jonathan Lia through their These Pictures banner. The movie aims to curate a unique kind of riff that will pay homage to the classic Bride of Frankenstein .

WestJet's COVID refunds-can you get your money back?
Numerous offers to customers from airlines for cancelled flights have previously been credits for future travel. Waiting five months to get $3,500 might be a lot of money for many people.

Seahawks QB Russell Wilson: Antonio Brown deserves another chance
If not, then we've got a lot of great players and we've got some guys that can really make some great plays too as well. Other teams have also expressed interest in Brown and there has been more and more activity around him in recent days.

Patrick Mahomes joins in as Twitter explodes over Daniel Jones journey
The Giants later pushed that lead to 11 before the Eagles staged a fourth-quarter comeback to win 22-21. Patrick Mahomes reacts to this by saying "I would never be able to run that far".

SoHum Health Now Offering Drive-up Flu Shots - Redheaded Blackbelt
This season it is more important than ever for people to protect themselves, their families, and their community from flu. The clinics are on Saturday mornings, from 9 noon, and people can walk in to get a shot without an appointment.

Florida Flying Squirrel Poaching Ring Arrested, 3,600 Rodents Trafficked Internationally
This wildlife dealer who is from Florida too, worked with couriers from Georgia who then drove these squirrels north to Chicago. FWC investigators later learned the suspects were also selling other protected animals, like freshwater turtles and alligators.

Shy’m annonce être enceinte de son premier enfant
Au milieu des danseurs, elle apparaît avec son petit ventre, avant de l'afficher clairement à la toute fin de son clip. Cependant l'artiste n'a pas révélé l'identité du père du bébé à venir ni la date à laquelle ce dernier doit arriver.

Mercedes-Benz to start local assembly in India
The GLC 43 joins 10 other non-AMG models now being brought-in via the CKD (Completely Knocked Down) route and assembled in Chakan. The Mercedes-AMG GLC 43 Coupe packs a 3.0-litre V6 twin-turbo under the hood that is capable of developing 385bhp and 520Nm.

U.S. talks with Armenia, Azerbaijan fail to reach pact
It also said Armenia had fired three ballistic missiles at three regions inside Azerbaijan but Armenia denied this. The US, Russia and France, who have long led mediation efforts, have so far ignored demands for a Turkish role.