espèce (1) structure sociale (1) projet (1) méthode (1) ordre (1) index (1) jeune (1) Weights and measures (1) Species (1) Social systems (1) Social structure (1) Social classes (1) Organization (1) Order (1) Males (1) Hierarchies (1) Conflict of interests (1) Comprehension (1) Chimpanzees (1) Ratings and rankings (1) Structure (1) Organization (1) répertoire (1)