Social facilitation in the feeding behaviour of pigs and the effect of rank

Liang Chou Hsia , D.G.M. Wood-Gush
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引用次数: 56

Abstract

Two groups each of three fattening pigs were used. After the rank order had been determined, the animals in each group were deprived of food for 12 hours. One was then left in the experimental room, given food ad libitum, and allowed to eat to satiation. Within 10 minutes of having stopped feeding, one of the others from its group was put in the adjacent stall and allowed to feed. In all cases, the apparently satiated pig started to feed when the newly-introduced pig started to feed. When used as the remaining pig, the dominant pig in each group fed for longer and ate more than the other-ranking pigs when a hungry pig was introduced into the next-door stall. In order to test whether the resumption of feeding was due to the cessation of isolation or due to the feeding behaviour of the introduced pig, a second experiment was performed. The same groups were used plus another group of three similar pigs. After 12 hours of food deprivation, two pigs were left in adjacent stalls and allowed to feed until satiated. The third member of their group was then introduced and allowed to feed in a stall facing the other two. In all cases the remaining pair fed for appreciable periods. These results confirm that social facilitation, as defined here, occurred in the feeding behaviour of these pigs.

猪饲喂行为的社会促进作用及等级的影响
试验采用两组,每组3头肥猪。在确定了等级顺序后,每组的动物被剥夺食物12小时。然后把其中一只留在实验室内,随意给它们食物,并让它们吃到饱。在停止喂食后的10分钟内,该组中的另一只被放在相邻的隔间里,并被允许喂食。在所有情况下,当新引入的猪开始进食时,明显吃饱的猪也开始进食。当被用作剩余的猪时,当一只饥饿的猪被引入隔壁的猪圈时,每组中的优势猪比其他排名靠前的猪喂食的时间更长,吃得更多。为了测试恢复饲养是由于停止隔离还是由于引进猪的摄食行为,进行了第二次实验。同样的组加上另一组3头相似的猪。剥夺食物12小时后,两只猪被放在相邻的猪圈里,直到吃饱为止。然后,他们的第三个成员被介绍给他们,并被允许在面对其他两个的摊位上喂食。在所有的情况下,剩下的一对在相当长的一段时间内进食。这些结果证实,社会促进,如这里所定义的,发生在这些猪的喂养行为。
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