| Concept/Content |
reciprocity / macaques grooming |
| Information caption |
Reciprocity can occur at various levels of costs and consequences. Grooming is not critical to survival, but it occurs frequently in many primate species, even among unrelated individuals. It is typically reciprocated by later grooming or other social "favors." In one study of food sharing in a chimpanzee troop, based on over 7,000 observed interactions, exchange was ultimately balanced for each chimp pair (de Waal 1989). [Note: Macaques, not chimpanzees, pictured here.] |
| Inquiry caption |
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| Photographer |
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| Credit |
public domain [wikipedia] |
| SIZE in pixels [file size] |
374x514 |
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