v4i2.74

ISSN: 1800-427X (print)
eISSN: 1800-427X (online)
DOI:10.47605/tapro.v4i2.74

Submitted date: 4 July 2012
Accepted date: 18 August 2012
Published date: 14 November 2012
Pp. 83–87.

GROUP-SIZE AND AGE-SEX COMPOSITION OF NILGIRI LANGUR Trachypithecus johnii (PRIMATES: CERCOPITHECIDAE) IN INDIA

Debahutee Roy*
*E-mail: moni.roy8@gmail.com

Abstract
Group size and group composition of Nilgiri langur (Trachypithecus johnii) was studied in two habitats of Parambikulam Tiger Reserve, Kerala, India. Group size and age-sex composition data was collected during scan sampling, 18 monitoring transect lines, road-strip count, and direct encounter of the groups. Mean group size value significantly differ between moist deciduous forest and evergreen forest. Group size was varied from 2 to 22. The maximum group size, 22 was recorded in evergreen forest habitat. The mean group size of Nilgiri langur is less in moist deciduous forest and higher in evergreen forest.

Key words : Demographic parameters, colobines, Parambikulam Tiger Reserve, Western Ghats.

Section Editor: Colin A. Chapman