期刊
BEHAVIORAL ECOLOGY
卷 29, 期 1, 页码 212-220出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/beheco/arx152
关键词
alarm signaling; animal personality; antipredator behavior; individual variation; social information; vocal communication
资金
- Fonds de Recherche du Quebec - Nature et Technologies (FRQNT)
- Discovery grants from the Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canada Research Chair
- FRQNT
- UQAM
- National Geographic Young Explorers grant [9422-13]
- Student Research grant from the Animal Behavior Society
- Undergraduate Summer Research Award from NSERC
- Biodiversity Science Discovery award from the Quebec Center for Biodiversity Science
Using social information can benefit individuals in many ways. Responding to alarm signals can, for instance, maximize survival under predation risk. However, foraging individuals should consider the reliability of such risk-based information to balance antipredator behavior and resource acquisition. Receiver decisions could depend on personality effects, as individual variation in risk-taking tendencies (i.e., boldness) could not only affect receiver perception of the signaled threat but also signaler reliability. Recent theoretical models support the possibility of coevolution between personality and communication strategies. Using a playback experiment, we show that wild eastern chipmunks (Tamias striatus) respond to alarm calls according to their own boldness level (measured as consistent individual differences in basal vigilance) and that they increase their vigilance response to bolder callers potentially considered as more reliable. Further, receivers respond to the callers' boldness regardless of their own boldness and independently of their familiarity level with callers, therefore decoding this information from vocalizations. Such effects of individual behavioral variation on the perception and interpretation of social information could apply to signals used in a variety of ecological contexts.
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