The role of male Sumatran slow loris Nycticebus coucang (Boddaert, 1785) in family at Yayasan Inisiasi Alam Rehabilitasi Indonesia (YIARI), Bogor, West Java

AbstractResearch has been conducted to identify the role of captive male sumatran slow lorisNycticebus coucang(Boddaert 1785) in family at Yayasan Inisiasi Alam Rehabilitasi Indonesia (YIARI) Rehabilitation Center, Bogor, West Java. The subjects were two male sumatran slow lorises living in shared cages with females and their infant. Focal animal sampling and ad libitum methods were used to observe interactions between male and female and their infant. The study took approximately 6 hours per day with 15 minutes non-stop interval in 24 days during October-November 2019. The total duration of the observation was equal to 8,628 minutes. Subjects spent 26.21 % of their time involved in social interactions with female and their infant. Interactions performed between subjects and femaleN. coucangoccurred as much as 13.18 % with the most performed interactions being proximity, social grooming, and approach respectively. Interactions between subjects and their infant occurred as much as 13.03 % of total duration with the most performed interactions included social grooming, proximity, and social playing respectively. Social interactions performed by subjects were higher compared to their counterparts in the wild. Captive maleN. coucangin YIARI played role as female’s social and sexual partner and in social development of their infant.