Similarity in food cleaning techniques within matrilines in wild vervet monkeys.

PloS One
Erica van de WaalRedouan Bshary

Abstract

Social learning and the formation of traditions rely on the ability and willingness to copy one another. A central question is under which conditions individuals adapt behaviour to social influences. Here, we demonstrate that similarities in food processing techniques emerge on the level of matrilines (mother-offspring) but not on the group level in an experiment on six groups of wild vervet monkeys that involved grapes covered with sand. Monkeys regularly ate unclean grapes but also used four cleaning techniques more similarly within matrilines: rubbing in hands, rubbing on substrate, open with mouth, and open with hands. Individual cleaning techniques evolved over time as they converged within matrilines, stabilised at the end and remained stable in a follow-up session more than one year later. The similarity within matrilines persisted when we analyzed only foraging events of individuals in the absence of other matriline members and matriline members used more similar methods than adult full sisters. Thus, momentary conversion or purely genetic causation are unlikely explanations, favouring social learning as mechanism for within matriline similarities. The restriction of traditions to matriline membership rather than to the...Continue Reading

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Citations

May 15, 2013·Animal Cognition·Anna Viktoria SchnoellClaudia Fichtel
Dec 30, 2014·Animal Cognition·Erica van de WaalAndrew Whiten
Jun 21, 2018·Animal Cognition·Stuart K WatsonAndrew Whiten
Apr 4, 2019·Primates; Journal of Primatology·Mathilde GramppJennifer Botting
May 15, 2018·Behavioral Ecology and Sociobiology·Andrew Whiten, Erica van de Waal
Jan 25, 2020·Nature Communications·Charlotte CanteloupErica van de Waal
Oct 24, 2020·Biology & Philosophy·Claudio TennieLydia M Hopper
Apr 17, 2019·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Justine MertzJennifer Botting
Jun 26, 2021·American Journal of Physical Anthropology·Justine PhilipponClémence Poirotte

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Methods Mentioned

BETA
PCRs
genotyping
electrophoresis

Software Mentioned

Tukey
SPAGeDi
lme4
SPSS
Microchecker
lme4 package for R

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