Animal Cognition

, Volume 18, Issue 3, pp 757–766

Domestic pigs’ (Sus scrofa domestica) use of direct and indirect visual and auditory cues in an object choice task

Original Paper

Abstract

Recently, foraging strategies have been linked to the ability to use indirect visual information. More selective feeders should express a higher aversion against losses compared to non-selective feeders and should therefore be more prone to avoid empty food locations. To extend these findings, in this study, we present a series of studies investigating the use of direct and indirect visual and auditory information by an omnivorous but selective feeder—the domestic pig. Subjects had to choose between two buckets, with only one containing a reward. Before making a choice, the subjects in Experiment 1 (N = 8) received full information regarding both the baited and non-baited location, either in a visual or auditory domain. In this experiment, the subjects were able to use visual but not auditory cues to infer the location of the reward spontaneously. Additionally, four individuals learned to use auditory cues after a period of training. In Experiment 2 (N = 8), the pigs were given different amounts of visual information about the content of the buckets—lifting either both of the buckets (full information), the baited bucket (direct information), the empty bucket (indirect information) or no bucket at all (no information). The subjects as a group were able to use direct and indirect visual cues. However, over the course of the experiment, the performance dropped to chance level when indirect information was provided. A final experiment (N = 3) provided preliminary results for pigs’ use of indirect auditory information to infer the location of a reward. We conclude that pigs at a very young age are able to make decisions based on indirect information in the visual domain, whereas their performance in the use of indirect auditory information warrants further investigation.

Keywords

Domestic pig Exclusion performance Object choice Indirect information 

Supplementary material

Supplementary material 1 (MPG 7068 kb)

Supplementary material 2 (MPG 5982 kb)

Supplementary material 3 (MPG 3058 kb)

Supplementary material 4 (MPG 10090 kb)

10071_2015_842_MOESM5_ESM.docx (16 kb)
Supplementary material 5 (DOCX 16 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of Animal Husbandry and Ecology, Institute of Agricultural and Nutritional SciencesMartin-Luther-UniversityHalleGermany

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