Sentinel dominance status influences forager use of social information

Julie M. Kern*, Seirian Sumner, Andrew N. Radford

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

17 Citations (Scopus)
297 Downloads (Pure)

Abstract

Animals in social groups can acquire information about the need for antipredator behavior by personally sampling the environment or from information provided by others. Use of such social information is expected to be adjusted according to its reliability, but experimental tests are rare and tend to focus just on alarm calls. We use detailed behavioral observations, acoustic analyses, and playback experiments to investigate how differences in sentinel dominance status affect the behavioral decisions of foraging dwarf mongooses (Helogale parvula). Dominant individuals acted as sentinels considerably more often than subordinate group members and used higher sentinel posts for guarding, making them potentially higher-quality sentinels in terms of experience and optimal positioning for predator detection. Surveillance calls produced during sentinel bouts contained vocal information about dominance status. Playback experiments showed that foragers used surveillance calls to detect sentinel presence and identity, and adjusted their vigilance behavior accordingly. When a dominant sentinel was on duty, compared with a subordinate groupmate, foragers increased reliance on social information, gathered less information through personal vigilance, and focused more on foraging. Our study contributes novel evidence that a major benefit of individual- and class-specific vocalizations is the potential to assess differences in caller information quality.

Original languageEnglish
Pages (from-to)1053-1060
Number of pages8
JournalBehavioral Ecology
Volume27
Issue number4
Early online date17 Feb 2016
DOIs
Publication statusPublished - 1 Jul 2016

Keywords

  • Antipredator vigilance
  • reliability
  • sentinel behavior
  • social information
  • vocal communication

Fingerprint Dive into the research topics of 'Sentinel dominance status influences forager use of social information'. Together they form a unique fingerprint.

Cite this