An attempt to condition flavour preference induced by oral and/or postoral administration of 16% sucrose in pigs
An attempt to condition flavour preference induced by oral and/or postoral administration of 16% sucrose in pigs
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DOI：
10.1016/j.physbeh.2013.10.025
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发表时间：
2014-01-30
影响因子：
2.9
通讯作者：
Val-Laillet, David
中科院分区：
文献类型：
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作者：
Clouard, Caroline;Loison, Florence;Val-Laillet, David
本研究利用蔗糖的热量值和/或甜味来研究猪的条件风味偏好的获得。九头缺水的幼猪接受了四次为期三天的调节训练，在此期间它们接受调味溶液作为条件刺激（CS）。 CS 解决方案与三种治疗方法配对，产生味觉和/或热量强化（美国）。 CS++溶液中添加有16%蔗糖并与十二指肠内(ID)输注水配对，CS++溶液与16%蔗糖ID输注配对并且CS-溶液与ID输注水配对。调理后一周和两周，对缺水的猪进行使用未强化CS溶液的二选一偏好测试。测量了溶液摄入量、行为活动和一些饮酒参数。尽管在调节期间 CS 摄入量没有差异，但与 CS+ 调节期间相比，在 CS++ 期间动物不活动的时间更少，站立的时间更长。当接受 CS++ 时，猪比接受 CS- 时更多地探索饮水槽。与 CS 条件相比，CS++ 条件下的饮酒次数和饮酒期间 (IDE) 暂停次数也分别减少了 36% 和 49%，但这些差异并不显着。在二选一测试中，猪没有表现出显着的偏好。然而，在第一阶段，与 CS+ 相比，猪似乎对 CS++（占总摄入量的 57%）表现出轻微的偏好。与 CS+ 和 CS- 相比，CS++ 饮酒事件的持续时间占总持续时间的 64%。饮用 CS++ 的总时间也占 CS++ 与 CS-测试总时间的 57%。 总之，尽管在二选一测试中没有发现明确的偏好，但在调节过程中口服 16% 蔗糖的感知会引起行为活动、动机反应和 CS 摄入微观结构的变化，这表明口服食物感知对于猪的食物选择过程的重要性。需要进一步的研究来调查缺水对猪风味偏好表达的影响。 (C) 2013 Elsevier Inc. 保留所有权利。
The present study investigated the acquisition of conditioned flavour preferences in pigs using the caloric value and/or sweet taste of sucrose. Nine water-deprived juvenile pigs were given four three-day conditioning sessions during which they received flavoured solutions as conditioned stimuli (CS). The CS solutions were paired with three treatments that generated a gustatory and/or a caloric reinforcement (US). The CS++ solution was added with 16% sucrose and paired with an intraduodenal (ID) infusion of water, the CS++ solution was paired with an ID infusion of 16% sucrose and the CS- solution was paired with an ID infusion of water. One and two weeks after conditioning, the water-deprived pigs were subjected to two-choice preference tests with the unreinforced CS solutions. Solutions intake, behavioural activity and some drinking parameters were measured. Despite no difference in CS intake during conditioning, the animals spent less time inactive and more time standing during CS++ than CS+ conditioning. When receiving CS++, the pigs explored the drinking trough more than when receiving CS-. Compared to the CS condition, the numbers of drinking episodes and intra-drinking episode (IDE) pauses were also 36% and 49% lesser in the CS++ condition, but these differences were not significant During the two-choice tests, the pigs did not show significant preferences. Nevertheless, during the first session, the pigs seemed to show a slight preference for the CS++ (57% of total intake) compared to CS+. The duration of CS++ drinking episodes represented 64% of the total duration compared to CS+ and CS- . The total time spent drinking the CS++ also represented 57% of the total time in the CS+ + vs. CS-test To conclude, although no clear-cut preferences were found during two-choice tests, the oral perception of 16% sucrose during conditioning induced changes in behavioural activities, motivational responses and microstructure of CS intake, suggesting the importance of oral food perception for food selection processes in pigs. Further studies are needed to investigate the impact of water deprivation on the expression of flavour preferences in pigs. (C) 2013 Elsevier Inc. All rights reserved.