Functional referents and acoustic similarity: field playback experiments with rhesus monkeys

Rhesus monkeys, Macaca mulatta, on the island of Cayo Santiago, Puerto Rico produce one or more of five acoustically distinctive calls when they find food. Three of these calls ('warbles', 'harmonic arches' and 'chirps') are produced by individuals finding high-quality, rare food items, whereas the other two calls ('coos' and 'grunts') are produced upon encountering lower-quality, common food items, and in non-food contexts as well. To determine how rhesus classify such acoustic variation, I conducted habituation experiments using a subset of the five call types. I designed experiments to reveal whether classification is based primarily on acoustic features or on the basis of a call's functional referent; caller identity was held constant within sessions. Habituation to 'warbles' transferred to 'harmonic arches', and vice versa. Thus, although these two calls are acoustically distinctive, they appeared to be perceptually clustered into one category based on referential similarities. In contrast, habituation to 'grunts' was followed by dishabituation to 'warbles' or 'harmonic arches', and habituation to 'warbles' or 'harmonic arches' was followed by dishabituation to 'grunts'. Dishabituation could be due to acoustic or referential differences. Significantly, the magnitude of the dishabituating response was asymmetric and depended upon the call type used in the habituation series. Thus, when subjects were habituated to 'grunts', they responded significantly more to tests of 'warbles' or 'harmonic arches' than when the sequence was reversed. These results suggest that for rhesus monkey food-associated calls, referential differences carry more weight during perceptual classification than do acoustical differences. Copyright 1998 The Association for the Study of Animal Behaviour. Copyright 1998 The Association for the Study of Animal Behaviour.

[1]  D. Rendall,et al.  Vocal recognition of individuals and kin in free-ranging rhesus monkeys , 1996, Animal Behaviour.

[2]  Bernard Wood,et al.  Topics in Primatology , 1994 .

[3]  S. S. Stevens,et al.  Handbook of experimental psychology , 1951 .

[4]  P. Marler,et al.  Food-associated calls in rhesus macaques (Macaca mulatta): I. Socioecological factors , 1993 .

[5]  P. Marler,et al.  The role of articulation in the production of rhesus monkey, Macaca mulatta, vocalizations , 1993, Animal Behaviour.

[6]  Colin Allen,et al.  The evolution of mind , 1998 .

[7]  William C. Stebbins,et al.  Evolution, Perception, and the Comparative Method , 1992 .

[8]  M. Hauser.  Costs of deception: cheaters are punished in rhesus monkeys (Macaca mulatta). , 1992, Proceedings of the National Academy of Sciences of the United States of America.

[9]  J. J. Benz.  Food-elicited vocalizations in golden lion tamarins: design features for representational communication , 1993, Animal Behaviour.

[10]  J. L. Gould.  Honey bee cognition , 1990, Cognition.

[11]  P. Marler,et al.  Monkey responses to three different alarm calls: evidence of predator classification and semantic communication. , 1980, Science.

[12]  P. Marler,et al.  Food-associated calls in rhesus macaques (Macaca mulatta): II. Costs and benefits of call production and suppression , 1993 .

[13]  M. Hauser,et al.  Left hemisphere dominance for processing vocalizations in adult, but not infant, rhesus monkeys: field experiments. , 1994, Proceedings of the National Academy of Sciences of the United States of America.

[14]  R. Wyttenbach,et al.  Categorical Perception of Sound Frequency by Crickets , 1996, Science.

[15]  Philip M. Groves,et al.  Chapter 7 – A Dual-Process Theory of Habituation: Theory and Behavior1 , 1973 .

[16]  Michael E. Pereira,et al.  Ringtailed lemur anti-predator calls denote predator class, not response urgency , 1991, Animal Behaviour.

[17]  S. Harnad.  Categorical Perception: The Groundwork of Cognition , 1990 .

[18]  How monkeys feel about the world: A review of how monkeys see the world , 1994 .

[19]  R. Seyfarth,et al.  Assessment of meaning and the detection of unreliable signals by vervet monkeys , 1988, Animal Behaviour.

[20]  K. Frisch.  The dance language and orientation of bees , 1967 .

[21]  P. Tannenbaum,et al.  Food-associated calls correlate with food preferences in cotton-top tamarins , 1991, Animal Behaviour.

[22]  W. Dittus.  Toque macaque food calls: Semantic communication concerning food distribution in the environment , 1984, Animal Behaviour.

[23]  E. Spelke.  Preferential-looking methods as tools for the study of cognition in infancy. , 1985 .

[24]  Stewart H. Hulse,et al.  The Comparative Psychology of Audition , 1990 .

[25]  P MARLER,et al.  The logical analysis of animal communication. , 1961, Journal of theoretical biology.

[26]  P. Marler,et al.  Rhesus monkey (Macaca mulatta) screams: Representational signalling in the recruitment of agonistic aid , 1984, Animal Behaviour.

[27]  P. Marler,et al.  Food calling and audience effects in male chickens, Gallus gallus: their relationships to food availability, courtship and social facilitation , 1994, Animal Behaviour.

[28]  P. D. Eimas,et al.  Speech Perception in Infants , 1971, Science.

[29]  Robert M. Seyfarth,et al.  Cercopithecines in multimale groups : genetic diversity and population structure , 1987 .

[30]  S. Altmann,et al.  Social communication among primates , 1967 .

[31]  P. Marler,et al.  Vervet monkey alarm calls: Semantic communication in a free-ranging primate , 1980, Animal Behaviour.

[32]  Cholesterol and dominance rank in the Cayo Santiago macaques. , 1987, Puerto Rico health sciences journal.

[33]  L. Petrinovich,et al.  Field studies of habituation: I. Effect of reproductive condition, number of trials, and different delay intervals on responses of the white-crowned sparrow. , 1979 .

[34]  P. C. Lee.  How monkeys see the world: Inside the mind of another species , 1990 .

[35]  Rhesus monkey copulation calls: honest signals for female choice? , 1993, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[36]  P. Marler,et al.  Categorical perception of a natural stimulus continuum: birdsong. , 1989, Science.

[37]  A. Tversky.  Features of Similarity , 1977 .

[38]  Clive K. Catchpole,et al.  The Behaviour of Communicating , 1978 .

[39]  M. Hauser,et al.  The endocrine stress response and alarm vocalizations in rhesus macaques , 1995, Animal Behaviour.

[40]  Peter Marler,et al.  Vocal communication in the domestic chicken: I. Does a sender communicate information about the quality of a food referent to a receiver? , 1986, Animal Behaviour.

[41]  A. Popper,et al.  The Evolutionary biology of hearing , 1992 .

[42]  W. Quine.  On the Reasons for Indeterminacy of Translation , 1970 .