期刊
ANIMAL BEHAVIOUR
卷 137, 期 -, 页码 1-9出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.anbehav.2017.12.018
关键词
alarm call; eavesdropping; impala; interspecific communication; predation; signal reliability; wildebeest; zebra
资金
- Murray and Pearl Rosenberg Memorial Award
- National Science Foundation GRFP Grant [00039202]
- James W. Wilkie Fund for Natural History Fellowship
- University of Minnesota Thesis Research Grant
- Alexander & Lydia Anderson Grant
- University of Minnesota Ecology, Evolution, and Behavior Department Research and Travel awards
Alarm calls can provide nontarget receivers with potentially life-saving information on predation risk. However, patterns of eavesdropping among species may be shaped by the reliability of the intercepted information, that is, the degree to which the alarm call represents a pertinent threat to the eavesdropping species ('relevance'). Prey are predicted to respond strongly to alarm calls from species that are attacked by the same predator guild, whereas species consumed by a larger or different subset of the carnivore community may act as a less reliable source of predator information. We used a playback experiment to examine whether the degree of antipredator responses to heterospecific alarm calls varied with the reliability of the calling species in three large African mammals: impala, Aepyceros melampus, common wildebeest, Connochaetes taurinus, and plains zebra, Equus quagga. Alarm calls of all three species were broadcast randomly to herds of their own species or to either of the other two species. In accordance with the reliability hypothesis, we found that all species reacted strongly to zebra alarm calls. Lions are the primary predator of zebra and represent a significant threat to all three prey species. In contrast, impala are consumed by a greater number of predators, and their alarm calls evoked weaker, mixed responses in the other two species. (c) 2018 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
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