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Gorilla study reveals complex pros and cons of friendship

  • An international team studied 164 wild mountain gorillas over more than 20 years in Rwanda to see how social lives affected health.
  • The study found social bonds carry benefits and costs that vary with group size, sex, and individual traits, complicating simple assumptions.
  • For example, females with strong bonds in small groups got ill less often but had fewer offspring, while females in larger groups were sicker but had more births.
  • Dr. Robin Morrison, the lead author, explained that while having many close social connections usually benefits individuals, there are occasions when it may have negative effects.
  • The findings suggest sociality’s evolutionary benefits vary by context, offering insights into social trait diversity in gorillas and other animals including humans.
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Study reveals pros and cons of gorillas being social

Over 160 wild mountain gorillas were examined to see how their social lives affected their health.

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Phys.org broke the news in United Kingdom on Monday, May 5, 2025.
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