In the emergence of composite signals 4, 5.
Specifically selected as a conspicuousness-enhancing “extra signal component” resulting Probability that it will be perceived by potential receivers. Transform it or change its quality (size, strength, colour, etc.), they do increase the Likelihood of the information conveyed by other pre-existing signals associated with theĪmplifiers operate in conjunction with the signal they amplify, and although they do not Have been interpreted as amplifiers 2, a class of signals that increase the detection Postural signalling in primates probably deserves more attention, even outside ofīody postures are an essential part of behavioural repertoires in animalsĪnd since Darwin’s pioneering work on The Expression of theĮmotions in Man and Animals 1 researchers have been interested in theirĬommunicative role in a wide array of taxa and behavioural contexts. Given the high social relevance of this sexual signal, our study emphasizes that Swellings, a conspicuous signal that is very attractive for both males and females. That the forelimb-crouch posture may play aĬommunicative role of amplification by enhancing the visibility of female sexual Ontogeny between males and females since immature males and females adopt the forelimb-crouch at similar frequencies.
Moreover, this strong difference results from a diverging In contrast, mature males almostĬompletely avoid this posture. Region is swollen than during the non-swollen phase. Show, by analysing more than 2,400 foraging events in 21 captive bonobos, that matureįemales adopt a rear-exposing posture ( forelimb-crouch) and do so significantly more often when their anogenital To our knowledge, their potentialįunctional role in the sociosexual life of bonobos has not been assessed yet. Postures exposing more or less of their genital area. While foraging on the ground,īonobos ( Pan paniscus) can adopt different crouching That increase the detection likelihood of other signals. Postures function as amplifiers, a class of signals Body postures are essential in animal behavioural repertoires and theirĬommunicative role has been assessed in a wide array of taxa and contexts.