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Author Kitchen, D.M.; Cheney, D.L.; Seyfarth, R.M. doi  openurl
  Title Male chacma baboons (Papio hamadryas ursinus) discriminate loud call contests between rivals of different relative ranks Type Journal Article
  Year 2005 Publication Animal cognition Abbreviated Journal Anim. Cogn.  
  Volume (down) 8 Issue 1 Pages 1-6  
  Keywords Acoustic Stimulation; Animals; *Discrimination Learning; *Hierarchy, Social; Male; Papio hamadryas/*psychology; *Social Dominance; *Vocalization, Animal  
  Abstract Males in multi-male groups of chacma baboons (Papio hamadryas ursinus) in Botswana compete for positions in a linear dominance hierarchy. Previous research suggests that males treat different categories of rivals differently; competitive displays between males of similar rank are more frequent and intense than those between disparately ranked males. Here we test whether males also respond differently to male-male interactions in which they are not directly involved, using playbacks of the loud 'wahoo' calls exchanged between competing males in aggressive displays. We played paired sequences of vocal contests between two adjacently ranked and two disparately ranked males to ten subjects, half ranking below the signalers in the call sequences and half above. Subjects who ranked above the two signalers showed stronger responses than lower-ranking subjects. Higher-ranking subjects also responded more strongly to sequences involving disparately ranked, as opposed to adjacently ranked opponents, suggesting that they recognized those individuals' relative ranks. Strong responses to sequences between disparately ranked opponents might have occurred either because such contests typically involve resources of high fitness value (defense of meat, estrous females or infants vulnerable to infanticide) or because they indicate a sudden change in one contestant's condition. In contrast, subjects who ranked lower than the signalers responded equally strongly to both types of sequences. These subjects may have been able to distinguish between the two categories of opponents but did not respond differently to them because they had little to lose or gain by a rank reversal between males that already ranked higher than they did.  
  Address Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA. dkitchen@psych.upenn.edu  
  Corporate Author Thesis  
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  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1435-9448 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:15164259 Approved no  
  Call Number refbase @ user @ Serial 687  
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Author Manser, M.B.; Seyfarth, R.M.; Cheney, D.L. openurl 
  Title Suricate alarm calls signal predator class and urgency Type
  Year 2002 Publication Trends in Cognitive Sciences Abbreviated Journal Trends. Cognit. Sci.  
  Volume (down) 6 Issue 2 Pages 55-57  
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  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1364-6613 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:15866180 Approved no  
  Call Number refbase @ user @ Serial 686  
Permanent link to this record
 

 
Author Seyfarth, R.M.; Cheney, D.L. isbn  openurl
  Title The Structure of Social Knowledge in Monkeys Type Book Chapter
  Year 2003 Publication Animal Social Complexity: Intelligence, Culture, and Individualized Societies Abbreviated Journal  
  Volume (down) Issue Pages  
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  Address  
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  Publisher Harvard University Press Place of Publication Cambridge, Massachusetts Editor F. B. M. de Waal; P. L. Tyack  
  Language English Summary Language Original Title Animal Social Complexity: Intelligence, Culture, and Individualized Societies  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN 978-0674009295 Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number refbase @ user @ Serial 464  
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Author Cheney, D. l .; Seyfarth, R. M. url  openurl
  Title Social complexity and the information acquired during eavesdropping by primates and other animals Type Book Chapter
  Year 2004 Publication Animal Communication networks Abbreviated Journal  
  Volume (down) Issue Pages  
  Keywords  
  Abstract In many of the studies reviewed in this book, eavesdropping takes the

following form: a subject has the opportunity to monitor, or eavesdrop upon, an

interaction between two other animals,Aand B. The subject then uses the information

obtained through these observations to assess A`s and B`s relative dominance

or attractiveness as a mate (e.g. Mennill et al., 2002; Ch. 2). For example, Oliveira

et al. (1998) found that male fighting fish Betta splendens that had witnessed two

other males involved in an aggressive interaction subsequently responded more

strongly to the loser of that interaction than the winner. Subjects-behaviour could

not have been influenced by any inherent differences between the two males, because

subjects responded equally strongly to the winner and the loser of competitive

interactions they had not observed. Similarly, Peake et al. (2001) presented

male great tits Parus major with the opportunity to monitor an apparent competitive

interaction between two strangers by simulating a singing contest using two

loudspeakers. The relative timing of the singing bouts (as measured by the degree

of overlap between the two songs) provided information about each “contestants”

relative status. Following the singing interaction, one of the “contestants” was

introduced into the male`s territory. Males responded significantly less strongly

to singers that had apparently just “lost” the interaction (see also McGregor &

Dabelsteen, 1996; Naguib et al., 1999; Ch. 2).

What information does an individual acquire when it eavesdrops on others?

In theory, an eavesdropper could acquire information of many different sorts:

about A, about B, about the relationship between A and B, or about the place of

Animal Communication Networks, ed. Peter K. McGregor. Published by Cambridge University Press.

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Cambridge University Press 2005.

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584 D. L. Cheney & R. M. Seyfarth

A`s and B`s relationship in a larger social framework. The exact information acquired

will probably reflect the particular species social structure. For example,

songbirds like great tits live in communities in which six or seven neighbours

surround each territory-holding male. Males appear to benefit from the knowledge

that certain individuals occupy specific areas (e.g. Brooks & Falls, 1975), that

competitive interactions between two different neighbours have particular outcomes,

and that these outcomes are stable over time. We would, therefore, expect

an eavesdropping great tit not only to learn that neighbour A was dominant to

neighbour B, for example, but also to form the expectation that A was likely to

defeat B in all future encounters. More speculatively, because the outcome of territorial

interactions are often site specific (reviewed by Bradbury & Vehrencamp,

1998), we would expect eavesdropping tits to learn further that A dominates B

in some areas but B dominates A in others. In contrast, the information gained

from monitoring neighbours interactions would unlikely be sufficient to allow

the eavesdropper to rank all of its neighbours in a linear dominance hierarchy,

because not all neighbouring males would come into contact with one another.

Such information would be difficult if not impossible to acquire; it might also be

of little functional value.

In contrast, species that live in large, permanent social groups have a much

greater opportunity to monitor the social interactions of many different individuals

simultaneously. Monkey species such as baboons Papio cynocephalus, for

example, typically live in groups of 80 or more individuals, which include several

matrilineal families arranged in a stable, linear dominance rank order (Silk et al.,

1999). Offspring assume ranks similar to those of their mothers, and females maintain

close bonds with their matrilineal kin throughout their lives. Cutting across

these stable long-term relationships based on rank and kinship are more transient

bonds: for example, the temporary associations formed between unrelated

females whose infants are of similar ages, and the “friendships” formed between

adult males and lactating females as an apparent adaptation against infanticide

(Palombit et al., 1997, 2001). In order to compete successfully within such groups, it

would seem advantageous for individuals to recognize who outranks whom, who

is closely bonded to whom, and who is likely to be allied to whom (Harcourt, 1988,

1992; Cheney & Seyfarth, 1990; see below). The ability to adopt a third party`s perspective

and discriminate among the social relationships that exist among others

would seem to be of great selective benefit.

In this chapter, we review evidence for eavesdropping in selected primate

species and we consider what sort of information is acquired when one individual

observes or listens in on the interactions of others. We then compare eavesdropping

by primates with eavesdropping in other animal species, focusing on both

potential differences and directions for further research
 
  Address  
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  Publisher Cambridge University Press Place of Publication Cambridge, Massachusetts Editor McGregor, P.K.  
  Language Summary Language Original Title  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 495  
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Author Cheney, D.L.; Seyfarth, R.M isbn  openurl
  Title Social and non.social knowledge in vervet monkeys Type Book Chapter
  Year 1988 Publication Machiavellian Intelligence Abbreviated Journal  
  Volume (down) Issue Pages 255-270  
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  Abstract  
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  Corporate Author Thesis  
  Publisher Oxford Univ Press Place of Publication Oxford Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN 0-19-852175-8 Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Equine Behaviour @ team @ Byrne+Whiten1988 Serial 4787  
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Author Cheney, D.L.; Seyfarth, R.M. openurl 
  Title How Monkeys See the World Type Miscellaneous
  Year 1990 Publication Abbreviated Journal  
  Volume (down) Issue Pages  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 4866  
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Author Seyfarth, R. M.; Cheney, D. L. isbn  openurl
  Title Do monkeys understand their realtions? Type Book Chapter
  Year 1988 Publication Machiavellian Intelligence Abbreviated Journal  
  Volume (down) Issue Pages  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Oxford University Press Place of Publication Oxford Editor Byrne, R.; Whiten, A.  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN 0-19-852175-8 Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5457  
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