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Effect of Neighbour Calls on Marmoset Behaviour . Frequency (hZ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X. Claire F. I. Watson and Christine A. Caldwell, University of Stirling. Time (sec). Introduction. Results. Conclusions.

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Effect of Neighbour Calls on Marmoset Behaviour

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Effect of Neighbour Calls on Marmoset Behaviour

Frequency (hZ)

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Claire F. I. Watson and Christine A. Caldwell, University of Stirling

Time (sec)

Introduction

Results

Conclusions

Marmoset social behaviour is affected by neighbouring calls through social contagion

Captive chimpanzees are influenced by calls from nearby social groups through social contagion.

They spend more time acting aggressively when neighbours call aggressively and more time in friendly grooming when neighbours make more grooming calls.

1 Aggression: between groups

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At a higher frequency of neighbouring calls marmosets spent significantly more time in behaviours and calls within the same category.

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The Neighbour Effect:

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Evidence supports:

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  • 1. Social contagion in marmosets

  • 2. Generality of the Neighbour Effect

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Is the behaviour of captive marmosets similarly influenced by the calls of their neighbours?

bristle tail bristle twitter loud twitter loud

Focal: present shrill shrill

Neighbour: twitter loud shrill twitter loud shrill

Method

p=.004 p=.026 p=.009 p<.001 p<.001 p<.001 p<.001

  • Aggression:

  • within groups

1. Observational Coding

2. Audio coding

Press to hear example call

Behaviour and calls of 32 focal marmosets coded. All calls during observation audio recorded.

Neighbour calls coded from audio recording.

3 Affiliation

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Implications for:

● Social cognition

● Marmoset welfare

● Marmoset behaviour

aggressive within

Focal: group behaviour

Neighbour: chatter call

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observer

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p=.043

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References

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Watson CFI, Caldwell CA (under review) Neighbor effects in marmosets: Social contagion of agonism and affiliation in captive Callithrix jacchus. American Journal of Primatology

3. Analysis

share groom chirp

Focal: food invite

Neighbour: chirp call

Focal marmoset behaviour compared between observations with a low frequency and ahigh frequency of neighbour vocalisations within same behavioural category.

Acknowledgements

With kind thanks to Prof H M Buchanan-Smith for her help and for her photograph. Many thanks also to Keith Morris and the staff of the MRC Human Reproductive Sciences Unit, and to Mr W M J Holland, Mr I M Harlow and Ms C A Howie.

p=.012 p=.024 p=.031


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