Raghubir Singh Pirta
Articles written in Proceedings – Animal Sciences
Volume 87 Issue 9 September 1978 pp 267-278
Twelve rhesus infants, reared in two groups in a forest habitat. Were observed for more than one year to study their reactions to conspecifics and the effect on home range size. The infants exhibited behaviours characteristic of wild rhesus monkeys in the absence of any prior physical exposure to their conspecifics. Both peer groups established intra- and intergroup dominance hierarchies. They remained aloof from wild rhesus monkeys and showed xenophobia to stranger infants. Their home ranges increased with age and rearing experience. No change was observed in home ranges after adding more individuals.
Volume 89 Issue 2 April 1980 pp 101-108
The behaviour of forty infants in five free-living groups of bonnet monkeys (
Volume 89 Issue 6 November 1980 pp 515-525
Changes in home range size in 7 groups of rhesus monkeys were observed in urban and forest habitats in north India. In three groups home range size decreased due to either emigration or trapping of the alpha male. The average reduction in home range size was 30.48%. In one group the home range decreased from 1·12 km2 to 0·46 km2 after the removal of all group members except alpha male. The home ranges of 3 groups increased slightly due to disturbance caused (a) by elephants, (b) by trapping and (c) by conspecific group. The increase in the home range was for a short period (less than 15 days) as long as the disturbing variable was present. However, the decrease in home range due to loss of alpha male was almost permanent. The importance of the personality of alpha male and his personal experiences in the maintenance of home range has been discussed.
Volume 91 Issue 1 January 1982 pp 13-26
Field observations were carried out on rhesus monkeys living in Asarori Forest, Chakia Forest, and temples. Data on group size, group composition and socionomic sex-ratios were obtained. An average home range size in these three habitats was fouad to be 5·18 km2 1·152 km2 and 0·017 km2 respectively. A positive correlation was found between group size and home range size in the Asarori Forest. Core areas were absent inside the home ranges in Chakia Forest. The average core area in other 2 habitats was 0·48 km2 and 0·009 km2 in Asarori Forest and temples respectively. The variability in home ranges and core areas is analysed in terms of differences in ecological conditions.
Volume 92 Issue 3 May 1983 pp 199-205
Two urban and two forest groups of rhesus monkeys (
Volume 93 Issue 2 March 1984 pp 83-89
Four rhesus groups, two forest and two urban, were observed to collect data on cooperative attack, cooperative defence and assuaging behaviour. Adult females were prominent as help giver in forest as well as urban area; however, cooperative attack was more among the latter. During cooperative defence, females tried to escape from attacks of males with the cooperation of males and females. This pattern was common in urban and forest monkeys, in both areas, females assuage infants when they sought contact, needed reassurance or were threatened.