During a 3-week handling period, six 8-week-old pigs were touched and fed raisins as a reward whenever they approached their handler, In subsequent training, the handlers and a non-handler wearing dark blue and white overalls, respectively, and wearing different eau de toilette fragrances sat at each end of a Y-maze. Pigs were rewarded with raisins when they chose the handler. Successful discrimination occurred when the pig chose the handler at least 15 times in 20 trials. When all pigs exhibited successful discrimination under these standard conditions, they were exposed to 4 experiments designed to test the importance of colour of overalls, type of eau de toilette and the influence of changes of the place in which the experiments were performed on the recognition of their original handler. It was concluded that pigs appeared to discriminate between a familiar and a non-familiar handler primarily using visual cues, the most important of which was the colour of clothing. The pigs had difficulty discriminating the handler from the non-handler in a new place.
|Publication Title||Applied Animal Behaviour Science|
|Author Address||Faculty of Applied Biological Science, Hiroshima University, 1-4-4 Higashi-Hiroshima, 739-8528, Japan.|
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