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Not eating like a pig: European wild boar wash their food

Sommer, V; Lowe, A; Dietrich, T; (2016) Not eating like a pig: European wild boar wash their food. Animal Cognition , 19 (1) pp. 245-249. 10.1007/s10071-015-0903-z. Green open access

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Abstract

Carrying food to water and either dunking or manipulating it before consumption has been observed in various taxa including birds, racoons and primates. Some animals seem to be simply moistening their food. However, true washing aims to remove unpleasant surface substrates such as grit and sand and requires a distinction between items that do and do not need cleaning as well as deliberate transportation of food to a water source. We provide the first evidence for food washing in suids, based on an incidental observation with follow-up experiments on European wild boar (Sus scrofa) kept at Basel Zoo, Switzerland. Here, all adult pigs and some juveniles of a newly formed group carried apple halves soiled with sand to the edge of a creek running through their enclosure where they put the fruits in the water and pushed them to and fro with their snouts before eating. Clean apple halves were never washed. This indicates that pigs can discriminate between soiled and unsoiled foods and that they are able to delay gratification for long enough to transport and wash the items. However, we were unable to ascertain to which degree individual and/or social learning brought this behaviour about.

Type: Article
Title: Not eating like a pig: European wild boar wash their food
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s10071-015-0903-z
Publisher version: http://doi.org/10.1007/s10071-015-0903-z
Language: English
Additional information: © Springer-Verlag Berlin Heidelberg 2015. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Life Sciences & Biomedicine, Behavioral Sciences, Zoology, Pigs, Food washing, Delayed gratification, SUS-SCROFA, BEHAVIOR, MACAQUES, MONKEYS
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Anthropology
URI: https://discovery.ucl.ac.uk/id/eprint/1539371
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