Quantitative studies of behaviour within captive groups of marmoset monkeys (Callithrix jacchus)

Quantitative data were collected on the behaviour of four social groupings of captive common marmost monkeys. The observational study covered a period of eight months in 1973 during which time, data were intermittently collected on marking, self and social grooming, three categories of social play, together with some few additional data on close physical proximity and social contact referred to as ‘huddling.’ Each social group was observed for a total of 180-ten-min. observation sessions; one family group of monkeys was further observed individually for 100-ten-min. sessions.