Archives for posts with tag: bonobos

When the going gets tough, the tough get… more relief from a placebo?“[T]he new findings link specific, established personality traits with an individual’s susceptibility to the placebo effect…. The researchers showed a significant link between certain personality traits and how much relief people said they felt when given the placebo – as well as the level of a specific chemical that their brains released…. The findings show that about one-quarter of placebo response was explained by the personality traits of resiliency, straightforwardness, altruism or anger/hostility, as measured on standardized tests.”

Oxytocin Keeps Flirting Folks at Arm’s Length“[M]en who were in a committed relationship even maintained a greater distance from an attractive woman when under the influence of oxytocin than their control group.”

Gene distinguishes early birds from night owls and helps predict time of death“Common gene variant helps determine the time you will wake up each day — and the time of day you are likely to die.”

Link between creativity and mental illness confirmed“People in creative professions are treated more often for mental illness than the general population, there being a particularly salient connection between writing and schizophrenia.” – via parapundit.

Identical Twins Are Genetically Different, Research Suggests – copy errors.

The mysterious Ainu“[I]s the physical similarity [of the Ainu] to Europeans just a matter of chance? Convergent evolution? No, it may be that the Ainu have just not changed as much physically as other East Asians. – from peter frost.

Pre-Neolithic Mediterranean Island settlement“‘[T]he first inhabitants of many of the Mediterranean islands may not have been modern humans at all. Instead, he says evidence has been found that shows that they might have been Neanderthals, or Homo Erectus.'” – from dienekes.

Evidence for Early Hafted Hunting Technology“[E]arly humans were manufacturing hafted multicomponent tools ~200,000 years earlier than previously thought.”

The Golden Age“If people were always getting dumber, why on Earth would the scientific revolution be recent?” – greg cochran’s latest, most excellent rant. (^_^)

Einstein’s Brain“Uncommon features of Einstein’s brain might explain his remarkable cognitive abilities” – @the breviary (with appropriate and enjoyable sarcasm from mangan… (~_^) ).

Brain scans of rappers shed light on creativity“Functional magnetic resonance imaging shows what happens in the brain during improvisation.”

Why “Multicultural Society” is a Logical Impossibility

In Defense of Favoritism“Affective neuroscience research on early-childhood bonding suggests that, as mammals, we probably start out as emotionally glued microcommunities (family and tribe) before we become autonomous ego-driven creatures. Favoritism, not egoism, is probably the primal value system. In short, favoritism or bias toward your group is not intrinsically racist, sexist, or closed-minded. Privileging your tribe does not render you negative or bigoted toward those outside your tribe.”

bonus: Study Tracks Brain Gene Response to Territorial Aggression“Researchers are mapping the genetic underpinnings of the stickleback’s aggressive behavior.”

bonus bonus: Bonobos Catch Yawns from Friends

bonus bonus bonus: ‘Rogue planet’ spotted 100 light-years away“Astronomers have spotted a ‘rogue planet’ – wandering the cosmos without a star to orbit – 100 light-years away.”

(note: comments do not require an email. aggressive stickleback lurking in the foliage….)

the other primates always make me smile. (^_^) here are a couple of quotes from a nice interview of frans de waal over @the primate diaries:

“Johnson: How does the environment affect this? For example, you’ve written that there are distinct differences between bonobos and chimpanzees despite the fact that they are so close genetically. Bonobos live in a female dominated society even though the males are still somewhat larger. You have suggested, as has the bonobo field researcher Frances White (who was one of my advisers in graduate school) that the environment may hold the answer to why this is.

“De Waal: It is possible that bonobos live in a richer environment and have more food sources in their forest that are less dispersed than chimpanzees do. They also have access to ground vegetation, which chimpanzees have to compete with gorillas over. As a result, bonobo females can travel together and don’t need to disperse like chimpanzee females do. Chimp females largely forage alone and would only be competing with each other if they foraged in a large group since the food patches are small. Because bonobo females can travel together, this gives them power in the sense that they can form coalitions against males. They’re very cooperative with each other and that’s how they keep the males in check. The males individually are dominant, but as soon as you get two or three females together they dominate the male.

“Johnson: Chimpanzees have long been the model for human evolution and have been used to justify the story that Huxley advocated about our violent past. Chimps have been known to form all-male bands that patrol their territory, even attacking and killing males from rival groups. However, bonobos show very different behaviors and have even been observed grooming males from other groups. Would you say that these behaviors are purely genetic or, as Cristophe Boesch and Gottfried Hohmann have suggested, that the environment is key to understanding why chimpanzees and bonobos behave so differently? Could it be a behavioral flexibility that is learned or even cultural in origin?

“De Waal: It is true that most chimpanzees and bonobos are very flexible animals who under different circumstances behave differently. We’re in the process of documenting that in Africa and you can also see the same thing in zoo groups. But if you look at, say, a group of twenty chimpanzees or twenty bonobos on a large island, and we have that kind of situation today, the bonobos behave very differently than the chimpanzees. Many of these differences are not just environmentally induced because the zoo environments are pretty much identical….

“Johnson: Today we are faced with what has widely been termed a ‘culture of corruption.’ In your latest book you point to the abuses on Wall Street in which financiers have willfully defrauded the public and Washington politicians who operate through a revolving door of political favors and corporate kickbacks. Is there something in this research with our evolutionary relatives that can help us change our political culture? For example, you and your colleague Sarah Brosnan discovered something very interesting in your study with chimpanzees and capuchin monkeys concerning economic behavior.

“De Waal: Yes, the first experiment was with capuchin monkeys where we would put two monkeys side by side and we would give them rewards for a very simple task. If you give them the same reward, such as small pieces of cucumber, they’re perfectly happy to do this many times in a row. But if you give one of the two monkeys a grape and the second a cucumber then the second monkey gets mad and refuses to perform the task. We have repeated this with chimpanzees where Sarah found that the one who gets more is also affected and refuses the task unless the other one also gets a grape. With this we’re getting very close to the sense of fairness.

interesting! but, me being me (with my quirky interest) would want to know, of course, if the chimps were related to one another or not.

read the whole interview over @the primate diaries.

see also: Why do people and other primates share food?

(note: comments do not require an email. grape?)

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