| Behavioural thermoregulation study was made on a unimale bisexual langur group of 21 individuals excluding infants at Veerpratappur, Puri district, Odisha using scan sampling method for over 80 hours during 2007; besides, ad libitum observations were also taken. Prior to this, reconnaissance observations were taken on the group. Data analysis of Regression coefficient by F test showed that there is no significant difference in rates of each behaviour pattern at different time periods of the day. While t-test used between two relevant behaviour patterns showed that certain behaviour patterns are used more than others at a particular time period. The rates of behaviour patterns with respect to the Sun did not differ significantly as langurs made use of shade significantly more than being in the Sun. The shade helps them to adopt diversity of postures with respect to the Sun at different time periods of the day thus helping them to regulate their exposure to solar radiation. |