Animal Cognition

, Volume 8, Issue 2, pp 114–121

Foraging behaviour in domestic pigs (Sus scrofa): remembering and prioritizing food sites of different value

  • S Held
  • J Baumgartner
  • A KilBride
  • R W Byrne
  • M Mendl
Original Article

DOI: 10.1007/s10071-004-0242-y

Cite this article as:
Held, S., Baumgartner, J., KilBride, A. et al. Anim Cogn (2005) 8: 114. doi:10.1007/s10071-004-0242-y

Abstract

This experiment investigated whether domestic pigs can remember the locations of food sites of different relative value, and how a restricted retrieval choice affects their foraging behaviour. Nine juvenile female pigs were trained to relocate two food sites out of a possible eight in a spatial memory task. The two baited sites contained different amounts of food and an obstacle was added to the smaller amount to increase handling time. On each trial, a pig searched for the two baited sites (search visit). Once it had found and eaten the bait, it returned for a second (relocation) visit, in which the two same sites were baited. Baited sites were changed between trials. All subjects learnt the task. When allowed to retrieve both baits, the subjects showed no preference for retrieving a particular one first (experiment 1). When they were allowed to retrieve only one bait, a significant overall preference for retrieving the larger amount emerged across subjects (experiment 2). To test whether this preference reflected an avoidance of the obstacle with the smaller bait, 15 choice-restricted control trials were conducted. In control trials obstacles were present with both baits. Pigs continued to retrieve the larger bait, indicating they had discriminated between the two food sites on the basis of quantity or profitability and adjusted their behaviour accordingly when the relocation choice was restricted. This suggests for the first time that domestic pigs have the ability to discriminate between food sites of different relative value and to remember their respective locations.

Keywords

Domestic pigSpatial memoryDiscriminationForaging behaviour

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • S Held
    • 1
  • J Baumgartner
    • 2
  • A KilBride
    • 1
  • R W Byrne
    • 3
  • M Mendl
    • 1
  1. 1.Department of Clinical Veterinary Science, Centre for Behavioural BiologyUniversity of BristolLangfordUK
  2. 2.Institute for Animal Husbandry and WelfareUniversity of Veterinary Medicine ViennaViennaAustria
  3. 3.Centre for Social Learning and Cognitive Evolution and Scottish Primate Research Group, School of PsychologyUniversity of St AndrewsSt AndrewsUK