Behavioral Ecology and Sociobiology

, Volume 63, Issue 8, pp 1097–1107

Vigilance behaviour and fitness consequences: comparing a solitary foraging and an obligate group-foraging mammal


  • Aliza le Roux
    • Department of Zoology and BotanyUniversity of Stellenbosch
    • Department of PsychologyUniversity of Michigan
    • Department of Zoology and BotanyUniversity of Stellenbosch
  • Lorenz Gygax
    • Federal Veterinary Office, Centre for Proper Housing of Ruminants and PigsAgroscope Reckenholz-Tänikon Research Station ART
  • Marta B. Manser
    • Animal Behaviour, Department of ZoologyUniversity of Zurich
Original Paper

DOI: 10.1007/s00265-009-0762-1

Cite this article as:
le Roux, A., Cherry, M.I., Gygax, L. et al. Behav Ecol Sociobiol (2009) 63: 1097. doi:10.1007/s00265-009-0762-1


Vigilance behaviour in gregarious species has been studied extensively, especially the relationship between individual vigilance and group size, which is often negative. Relatively little is known about the effect of conspecifics on vigilance in non-obligate social species or the influence of sociality itself on antipredator tactics. We investigated predator avoidance behaviour in the yellow mongoose, Cynictis penicillata, a group-living solitary forager, and compared it with a sympatric group-living, group-foraging herpestid, the meerkat, Suricata suricatta. In yellow mongooses, the presence of conspecifics during foraging—an infrequent occurrence—reduced their foraging time and success and increased individual vigilance, contrary to the classical group-size effect. Comparing the two herpestids, sociality did not appear to affect overt vigilance or survival rates but influenced general patterns of predator avoidance. Whereas meerkats relied on communal vigilance, costly vigilance postures, and auditory warnings against danger, yellow mongooses avoided predator detection by remaining close to safe refuges and increasing “low-cost” vigilance, which did not interfere with foraging. We suggest that foraging group size in herpestids is constrained by species-distinct vigilance patterns, in addition to habitat and prey preference.


Group foragingMeerkatsSolitary foragingVigilanceYellow mongoose

Copyright information

© Springer-Verlag 2009