In: Language and Cognition, 2013, vol. 5, no. 2-3, p. 133-143
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Public access from 01.09.2018
In: Language and Cognition, 2013, vol. 5, no. 2-3, p. 133-143
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In: Science Advances, 2017, vol. 3, no. 4, p. e160275
Current research on animal culture has focused strongly on cataloging the diversity of socially transmitted behaviors and on the social learning mechanisms that sustain their spread. Comparably less is known about the persistence of cultural behavior following innovation in groups of wild animals. We present observational data and a field experiment designed to address this question in a wild...
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In: Current Biology, 2008, vol. 18, no. 5, p. R202-R203
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In: PLoS ONE, 2008, vol. 3, no. 6, p. e2431
The adaptive function of copulation calls in female primates has been debated for years. One influential idea is that copulation calls are a sexually selected trait, which enables females to advertise their receptive state to males. Male-male competition ensues and females benefit by getting better mating partners and higher quality offspring. We analysed the copulation calling behaviour of...
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In: Animal Behaviour, 2009, vol. 78, no. 1, p. 35-44
Field studies on male forest guenon alarm-calling behaviour have revealed a number of intricacies about how these primates use vocalizations to protect themselves from predation. In these species, the vocal behaviour of adult females is often different from that of the males, but little systematic work has been done. Here, we describe the alarm call system of female Campbell's monkeys,...
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In: PLoS ONE, 2009, vol. 4, no. 11, p. e7808
Human language has evolved on a biological substrate with phylogenetic roots deep in the primate lineage. Here, we describe a functional analogy to a common morphological process in human speech, affixation, in the alarm calls of free-ranging adult Campbell's monkeys (Cercopithecus campbelli campbelli). We found that male alarm calls are composed of an acoustically variable stem, which...
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In: Journal of Comparative Psychology, 2009, vol. 123, no. 2, p. 136-150
Vervet monkey alarm calling has long been the paradigmatic example of how primates use vocalizations in response to predators. In vervets, there is a close and direct relationship between the production of distinct alarm vocalizations and the presence of distinct predator types. Recent fieldwork has however revealed the use of several additional alarm calling systems in primates. Here, the...
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In: Animal Cognition, 2009, vol. 12, no. 3, p. 441-449
When experiencing aggression from group members, chimpanzees commonly produce screams. These agonistic screams are graded signals and vary acoustically as a function of the severity of aggression the caller is facing. We conducted a series of field playback experiments with a community of wild chimpanzees in the Budongo Forest, Uganda, to determine whether individuals could meaningfully...
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In: Behavioral Ecology and Sociobiology, 2010, vol. 64, no. 12, p. 1959-1966
Chimpanzees produce acoustically distinct calls when encountering food. Previous research on a number of species has indicated that food-associated calls are relatively widespread in animal communication, and the production of these calls can be influenced by both ecological and social factors. Here, we investigate the factors influencing the production of food-associated calls in wild...
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