Group size effect on vigilance: evidence from Tibetan gazelle in Upper Buha River, Qinghai-Tibet Plateau

Behavioural Processes
Zhongqiu Li, Zhigang Jiang

Abstract

Tibetan gazelle Procapra picticaudata is a threatened and endemic species to the Qinghai-Tibet Plateau. With the method of group scan sampling, we observed the behaviours of males and females of the gazelle in the two summers of 2005 and 2006, in order to test the group size effect on group vigilance. We found that male gazelles were significantly more vigilant than the females at both group scan level (percentage of individuals scanning during a session) and group scan frequency (percentage of intervals with at least one individual scanning). We also found a negative correlation between group scan level and group size and a positive correlation between group scan frequency and group size, showing the group size effect on vigilance was testified in Tibetan gazelle. The predation factor might be the main driving force for the group size effect.

References

Feb 1, 1989·Biological Reviews of the Cambridge Philosophical Society·M A Elgar
Feb 1, 1973·Journal of Theoretical Biology·H R Pulliam
Jun 5, 2003·The American Naturalist·G Beauchamp, G D Ruxton
Jun 28, 2003·Behavioural Processes·Guy Beauchamp
Feb 3, 2005·Behavioural Processes·Christoph Randler
Feb 4, 2006·Oecologia·Pablo MichelenaRichard Bon
May 17, 2006·Trends in Ecology & Evolution·Esteban Fernández-JuricicAlex Kacelnik

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Citations

May 12, 2009·Behavioural Processes·Bryan M KlueverDavid L Bergman
Jul 5, 2019·Biological Reviews of the Cambridge Philosophical Society·Guy Beauchamp

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