A social structure where individual animals live alone, but each male's territory overlaps with those of several females.
1966 August 26, Richard Ardrey, "Strongest Bond of All - The Space We Own" in ''LIFE'', page 58:
- Borders are violated by hungering males and famished females, and the ordered animosities of the ''noyau'' give way to a saturnalia of sexual adventure.
1999, Ronald M. Nowak, ''Walker's Primates of the World'', JHU Press (ISBN), page 27
- The orangutan (Pongo pygmaeus) also exhibits the ''noyau'' system and appears to be the only diurnal primate with a largely solitary lifestyle.
2000, Sergio M. Pellis & Andrew N. Iwaniuk, "Adult-Adult Play in Primates: Comparative Analyses of Its Origin, Distribution and Evolution", ''Ethology'' 106, page 1089:
- This "noyau" pattern is found among various nocturnal strepsirrhines.
stone (of a fruit)