The social behaviour and ecology of Indri Indri

摘要: A period of 15 months was spent studying the behaviour and ecology Indri indri in eastern rain-forest Madagascar. Two groups were habituated to observer followed every six weeks for a complete year. Quantitatives sampling techniques were developed which allowed several animals' to be simultaneously recorded. Surveys conducted three areas different botanical topographical structure censuses performed both at beginning end study. Some behavioural properties a population Indri were investigated one study site by collecting data on vocal interactions between approximately 40 groups. The maintenance activities species are described assessed. Seasonal individual variation are compared groups studied with other species. Social is analysed (1) measures animal interaction and (2) terms inter-dependence some individuals' behaviour others. Measures spacing feeding are shown to be suitable this approach. Evidence for the territoriality is presented its adaptive qualities considered. The roles territory definition, declaration occupation contrasted and compared. development infant and juvenile examined individual and social adaptations. Some facets ecological and social differentiation society proposed.