動物心理学の応用を考える : 家畜動物の管理を中心に(心理学基礎研究の地域貢献を考える,2003年度第2回フォーラム)

概要

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The present study reports on examples of operant conditioning in domestic pigs that were bred under ordinary feeding schemes of the livestock industry. Two castrated male pigs could successfully be shaped to press a lever with successive approximation by 3.4g food pellets and 2s buzzers without additional food deprivation. Frequency of responses was increased from 5/min to 10/min during training with CRF. Rapid extinction was observed. In later sessions of acquisition, pigs hoarded food pellets by pressing the lever several times before going to the feeder. This hoarding behavior was eliminated when only the first response of the hoarding response was reinforced. This result suggests that the hoarding behavior is a strategy to save the cost required for reciprocating movements between the lever and the feeder. In the next experiment, the shuttling behavior of a pig was shaped using two manipulanda where responses to one manipulandum (a response panel) were reinforced by food pellets, and those to the other manipulandum (a concrete-block) were reinforced by presentations of the response panel. This shuttling behavior could be applied to discrete operant procedures such as simultaneous visual discrimination in adult pigs.
日本基礎心理学会の論文
2004-09-30