Reciprocal altruism.
School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA. Electronic address: joansilk@gmail.com.
Joan B
JB
Silk
D000533:Altruism; D000818:Animals; D001522:Behavior, Animal; D002685:Chiroptera / Q000502:physiology; D003299:Cooperative Behavior; D005260:Female; D006120:Grooming; D006801:Humans; D008297:Male; D002679:Pan troglodytes / Q000502:physiology; D010215:Papio / Q000502:physiology