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- W2000997987 abstract "Abstract Once prey animals have detected predators, they must make decisions about how to respond based on a cost‐benefit analysis of their risk level. The threat sensitivity hypothesis predicts that prey animals match their response to the level of risk, with high‐risk predator encounters eliciting stronger evasive responses than low‐risk encounters. Primates are known prey of snakes, yet they vary their responses toward snakes. We predicted that primates match their response to the threat level from snakes by assessing posture, with striking postures indicating greater risk than coiled postures and coiled postures indicating greater risk than extended sinusoidal postures. We tested this prediction in a series of experimental trials in which captive rhesus macaques ( M acaca mulatta ) were exposed to snake models in those postures. Results supported the predictions: macaques responded more strongly to a snake model in a striking posture than in a coiled posture and more to a snake model in a coiled posture than to an extended sinusoidal snake model. We also examined responses of macaques to a partially exposed snake model to mimic the condition of incomplete information, as snakes are often occluded by vegetation. The occluded snake model evoked a response comparable to that of the striking snake. These findings support the threat sensitivity hypothesis. Rhesus macaques use the posture of snakes as a cue in threat assessment, responding more intensely as threat increases, and they also behave as if risk is elevated when their information about snakes is incomplete." @default.
- W2000997987 created "2016-06-24" @default.
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- W2000997987 date "2014-08-13" @default.
- W2000997987 modified "2023-10-07" @default.
- W2000997987 title "Rhesus Macaques (<i>Macaca mulatta</i>) Use Posture to Assess Level of Threat From Snakes" @default.
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- W2000997987 doi "https://doi.org/10.1111/eth.12293" @default.
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