Animal Cognition

, Volume 19, Issue 1, pp 245–249 | Cite as

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

Short Communication

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.

Keywords

Pigs Food washing Delayed gratification 

References

  1. Allritz M, Tennie C, Call J (2013) Food washing behaviour and placer mining in captive great apes. Primates 54:361–370PubMedCrossRefGoogle Scholar
  2. Fuster JM (2008) The prefrontal cortex, 4th edn. Academic Press/Elsevier, BostonGoogle Scholar
  3. Gieling ET, Nordquist RE, van der Staay FJ (2011) Assessing learning and memory in pigs. Anim Cogn 14:151–173PubMedPubMedCentralCrossRefGoogle Scholar
  4. Judge PG, Essler JL (2013) Capuchin monkeys exercise self-control by choosing token exchange over an immediate reward. Int J Comp Pyschol 26:256–266Google Scholar
  5. Kawai M (1965) Newly-acquired pre-cultural behavior of the natural troop of Japanese monkeys on Koshima Islet. Primates 6:1–30CrossRefGoogle Scholar
  6. Kornum BR, Knudsen GM (2011) Cognitive testing of pigs (Sus scrofa) in translational biobehavioral research. Neurosci Biobehav Rev 35:437–451PubMedCrossRefGoogle Scholar
  7. Laumer IB (2013) Delay of gratification in a food exchange task in Goffin cockatoos (Cacatua goffini). Dissertation, UniwienGoogle Scholar
  8. Leaper R, Massei G, Forman ML, Aspinall R (1999) The feasibility of reintroducing wild boar (Sus scrofa) to Scotland. Mammal Rev 29:239–258CrossRefGoogle Scholar
  9. Lyall-Watson M (1963) A critical re-examination of food “washing” behaviour in the raccoon (Procyon lotor Linn.). J Zool 141:371–393Google Scholar
  10. Mendl N, Held, Byrne RW (2010) Pig cognition. Curr Biol 20:R796–R798PubMedCrossRefGoogle Scholar
  11. Morales M, Mundy P, Crowson M, Neal R, Delgado C (2005) Individual differences in infant attention skills, joint attention, and emotion regulation behavior. Int J Behav Dev 29:259–263CrossRefGoogle Scholar
  12. Morand-Ferron J, Lefbvre L, Reader SM, Sol D, Elvin S (2004) Dunking behaviour in Carib grackles. Anim Behav 68:1267–1274CrossRefGoogle Scholar
  13. Nakamichi M, Kato E, Kojima Y, Itoigawa N (1998) Carrying and washing of grass roots by free-ranging Japanese macaques at Katsuyama. Folia Primatol 69:35–40PubMedCrossRefGoogle Scholar
  14. Oostindjer M, Bolhuis JE, Medl M, Held S (2011) Learning how to eat like a pig: effectiveness of mechanisms for vertical social learning in piglets. Anim Behav 82:503–511CrossRefGoogle Scholar
  15. Pacioni G (1986) Truffle hunting in Italy. Bull Br Mycol Soc 20:50–51CrossRefGoogle Scholar
  16. Perry S, Manson JH (2003) Traditions in monkeys. Evol Anthropol 12:71–81CrossRefGoogle Scholar
  17. Tomasello M, Call J (1997) Primate cognition. Oxford University Press, OxfordGoogle Scholar
  18. Visalberghi E, Fragaszy DM (1990) Food-washing behaviour in tufted capuchin monkeys, Cebus apella, and crabeating macaques, Macaca fascicularis. Anim Behav 40:829–836CrossRefGoogle Scholar
  19. Watanabe K (1994) Precultural behavior of Japanese macaques: longitudinal studies of the Koshima troops. In: Gardner RA, Gardner BT, Chiarelli B, Plooij FC (eds) The ethological roots of culture. Kluwer, Dordrecht, pp 81–91CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of AnthropologyUniversity College LondonLondonUK
  2. 2.Basel ZooBaselSwitzerland

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