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22 May 2017
Article (Scientific journals)
Intergroup variation in robbing and bartering by long-tailed macaques at Uluwatu Temple (Bali, Indonesia)
Brotcorne, Fany  ; Giraud, Gwennan  ; Gunst, Noelle et al.
2017 • In Primates: Journal of Primatology, 58, p. 505–516
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Abstract :
[en] Robbing and bartering (RB) is a behavioral practice anecdotally reported in free-ranging commensal macaques. It usually occurs in two steps: after taking inedible objects (e.g., glasses) from humans, the macaques appear to use them as tokens, returning them to humans in exchange for food. While extensively studied in captivity, our research is the first to investigate the object/food exchange between humans and primates in a natural setting. During a 4-month study in 2010, we used both focal and event sampling to record 201 RB events in a population of long-tailed macaques (Macaca fascicularis), including four neighboring groups ranging freely around Uluwatu Temple, Bali (Indonesia). In each group, we documented the RB frequency, prevalence and outcome, and tested the underpinning anthropogenic and demographic determinants. In line with the environmental opportunity hypothesis, we found a positive qualitative relation at the group level between time spent in tourist zones and RB frequency or prevalence. For two of the four groups, RB events were significantly more frequent when humans were more present in the environment. We also found qualitative partial support for the male-biased sex ratio hypothesis [i.e., RB was more frequent and prevalent in groups with higher ratios of (sub)adult males], whereas the group density hypothesis was not supported. This preliminary study showed that RB is a spontaneous, customary (in some groups), and enduring population-specific practice characterized by intergroup variation in Balinese macaques. As such, RB is a candidate for a new behavioral tradition in this species.
Disciplines :
Zoology
Author, co-author :
Brotcorne, Fany  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Giraud, Gwennan ;  Université de Liège - ULiège > Behavioural Biology Unit
Gunst, Noelle;  University of Lethbridge > Department of Prychology
Fuentes, Agustin;  University of Notre Dame > Departmement of Anthropology
Wandia, I Nengah
Beudels-Jamar, Roseline
Poncin, Pascal ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Huynen, Marie-Claude ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Leca, Jean-Baptiste;  University of Lethbridge > Department of Psychology
Language :
English
Title :
Intergroup variation in robbing and bartering by long-tailed macaques at Uluwatu Temple (Bali, Indonesia)
Publication date :
2017
Journal title :
Primates: Journal of Primatology
ISSN :
0032-8332
Publisher :
Springer Tokyo, Tokyo, Japan
Volume :
58
Pages :
505–516
Peer reviewed :
Peer Reviewed verified by ORBi

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