Daily activity pattern and time budget of Fran?ois langur Trachypithecus fran?oisi in Longgang Nature Reserve, China

摘要

Data on daily activity patterns and time budgets of Fran?ois langurs Trachypithecus fran?oisi in Longgang Nature Reserve were collected between October 2005 and September 2006 via instantaneous scan sampling. Our results indicated that there were two daily feeding peaks (occurred during 07:00–09:00 and 16:00–18:00h), and one resting peak (occurred during 10:00–14:00h). The daily activity patterns showed seasonal variations: in the dry season, a longer feeding duration was exhibited in the morning feeding peak, and the feeding peak occurred 1 hour later in the morning and ended 1 hour earlier in the afternoon than during the rainy season. In the rainy season, the resting peak occurred earlier, and feeding and travel activities were almost absent in this period. During the study period, langurs spent an average of 51.99% of time at rest, 20.25% moving, 18.61% feeding, 7.61% grooming, 1.20% playing, and 0.14% other activities. There were significant seasonal variations in their time budgets. Langurs spent more time feeding and moving, and less time resting in the dry season than in the rainy season. Time budgets also differed among the various sex-age classes. Compared to the immatures, adult individuals spent more time resting and feeding, and less time moving and playing. Adult females devoted more time to grooming than adult males[Acta Zoologica Sinica 53(4)：589–599].