Grooming and Aggression: A Comparative Study of Rhesus Macaque (Macaca mulatta) and Hanuman langurs (Prebystis entellus)

Journal of the Anthropological Survey of India, 66(1-2) : (247-260), 2017

Grooming and Aggression: A Comparative Study of Rhesus Macaque (Macaca mulatta) and Hanuman langurs (Prebystis entellus)

Tanya Gill
Department of Anthropology, University of Delhi, Delhi

Abstract
This paper studies two species, Hanuman langurs (Prebystic entellus) of Mount Abu from the subfamily colobine and Rhesus macacques (Macaca mulatta) of Delhi from cercopithecinae. The free ranging group of two types of monkeys were studied to understand the different behavioural adaptations resulting in their successful survival in a transient habitat. Their close proximity to human population is an important characteristic of the study, acting as one of the many variables that influence their behaviour. Behavioural components, of the two species, which included grooming, foraging and aggression, were selected and then quantitatively compared. These components have an evolutionary cost which each species has to pay in order to sustain,which may be studied through cross-specific examination of behaviour. The study assisted in understanding the changing behaviour of animals as well as to understand the relationship between the genetic and social foundation of behaviour. When studied cross specifically, both the species have displayed different behaviours, as expected, due to their phylogenetic distance. There seems to be a strong relationship between different components of behaviour which don’t yield much information when studied in isolation.

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