Document Detail

Patterns of infant handling and relatedness in Barbary macaques (Macaca sylvanus) on Gibraltar.
MedLine Citation:
PMID:  18781278     Owner:  NLM     Status:  MEDLINE    
Among papionin primates, the Barbary macaque (Macaca sylvanus) shows the most extensive interactions between infants and group members other than the mother. Two different types of interactions occur: (1) long-lasting dyadic interactions between a handler and an infant, and (2) brief triadic interactions between two handlers involving an infant. Previous investigations showed that infant handling by males is best explained as use of infants to manage relationships with other males. In contrast, no adaptive explanation for infant handling by females emerged. Here, we compared the infant-handling pattern between subadult/adult males and subadult/adult females in a free-ranging group of 46 Barbary macaques on Gibraltar to test whether the relationship management hypothesis also applies to female handlers. We further investigated the infant-handling pattern of juveniles and used microsatellite markers to estimate relatedness between infant handlers and the infant's mother. We found that males, females and juveniles all participated extensively in triadic interactions using infants of above-average related females. In contrast, only males and juveniles were highly involved in dyadic interactions with infants of related females, while females rarely handled infants other than their own. The pattern of infant handling was entirely compatible with the predictions of the relationship management hypothesis for males and mostly so for females. Moreover, our genetic analysis revealed that males and females differ in their partner choice: while females preferred to interact with related females, males had no significant preference to interact with related males. We further discuss the observed above-average relatedness values between infant handlers and the infant's mother in the light of kin-selection theory.
Rolf Kümmerli; Robert D Martin
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-09-10
Journal Detail:
Title:  Primates; journal of primatology     Volume:  49     ISSN:  0032-8332     ISO Abbreviation:  Primates     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-10-23     Completed Date:  2009-01-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401152     Medline TA:  Primates     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  271-82     Citation Subset:  IM    
Anthropological Institute, University of Zürich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
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MeSH Terms
Age Factors
Analysis of Variance
Macaca / genetics,  physiology*
Maternal Behavior*
Microsatellite Repeats / genetics
Nesting Behavior / physiology*
Paternal Behavior*
Sex Factors
Sexual Behavior, Animal / physiology*

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