How chimpanzees (Pan troglodytes) share the spoils with collaborators and bystanders


Autoři: Maria John aff001;  Shona Duguid aff002;  Michael Tomasello aff003;  Alicia P. Melis aff002
Působiště autorů: Dr Maria John Communications, Leipzig, Germany aff001;  Department of Experimental Psychology, University College London, London, United Kingdom aff002;  Department of Psychology and Neuroscience, Duke University, Durham, NC, United States of America aff003
Vyšlo v časopise: PLoS ONE 14(9)
Kategorie: Research Article
doi: 10.1371/journal.pone.0222795

Souhrn

Chimpanzees hunt cooperatively in the wild, but the factors influencing food sharing after the hunt are not well understood. In an experimental study, groups of three captive chimpanzees obtained a monopolizable food resource, either via two individuals cooperating (with the third as bystander) or via one individual acting alone alongside two bystanders. The individual that obtained the resource first retained most of the food but the other two individuals attempted to obtain food from the "captor" by begging. We found the main predictor of the overall amount of food obtained by bystanders was proximity to the food at the moment it was obtained by the captor. Whether or not an individual had cooperated to obtain the food had no effect. Interestingly, however, cooperators begged more from captors than did bystanders, suggesting that they were more motivated or had a greater expectation to obtain food. These results suggest that while chimpanzee captors in cooperative hunting may not reward cooperative participation directly, cooperators may influence sharing behavior through increased begging.

Klíčová slova:

Behavior – Food consumption – Fruits – Meat – Predation – Wildlife – Chimpanzees – Hunting behavior


Zdroje

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PLOS One


2019 Číslo 9

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