Disturbance effects of environmental stimuli on pig spatial memory
Disturbance effects of environmental stimuli on pig spatial memory
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DOI：
10.1016/s0168-1591(99)00036-2
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发表时间：
1999-07-01
影响因子：
2.3
通讯作者：
Mendl, M
中科院分区：
文献类型：
--
作者：
Laughlin, K;Huck, M;Mendl, M
我们调查了干扰影响的环境刺激，典型的那些猪可能会遇到在农场条件下，对空间记忆能力的家猪，野猪。10只雄性猪在八臂径向迷宫中进行了训练，以执行一个双赢的转变觅食任务。每天，他们单独进入迷宫，在八个手臂中的四个随机寻找食物（搜索）。在找到并吃掉食物后，将它们放回它们的家围栏，保持10分钟的间隔，然后允许它们回到迷宫中寻找放置在四个先前未加诱饵的臂中的食物（重新定位）。一旦猪在搬迁试验中达到了选择准确性的标准水平，在保留间隔期间提供了各种治疗，并测量了随后的选择准确性。探索一个新的环境，并介绍了一个不熟悉的猪在保留时间间隔导致在搬迁试验中的性能较差相比，非干扰控制，但没有减少选择的准确性，一个随机重复。然而，迷宫中心内的限制后的性能并没有偏离随机行为。这种处理给动物提供了与任务相关的刺激，这可能直接干扰了存储在记忆中的信息。限制在一个称重板条箱中产生的动物最引起和激动的行为，但导致的食物网站的记忆可以忽略不计的中断。与其他治疗不同，在这种治疗期间，动物的注意力没有明显的集中，这表明在保持间隔期间的“注意力转移”可能会影响记忆储存或巩固。在每只手臂的末端去除一些视觉线索并没有破坏性能。这表明，如果猪通过视觉线索确定自己的方向，它们使用的线索范围比通过每只手臂末端可见的线索范围更广。（C）1999 Elsevier Science B.V.版权所有。
We investigated the disturbance effects of environmental stimuli, typical of those which pigs might experience under farm conditions, on the spatial memory abilities of domestic pigs, Sus scrofa. Ten male pigs were trained to perform a win-shift foraging task in an eight-arm radial maze. Each day, they individually entered the maze to search for food randomly located in four of the eight arms (search). After finding and eating the food, they were returned to their home pens for a retention interval of 10 min, and then allowed back into the maze to search for food placed in the four previously unbaited arms (relocation). Once the pigs had reached a criterion level of choice accuracy in relocation trials, various treatments were presented during the retention interval, and subsequent choice accuracy was measured. Exploration of a novel environment and introduction to an unfamiliar pig during the retention interval resulted in poorer performance in relocation trials as compared to non-disturbed control, but did not reduce choice accuracy to that of a random searcher. However, performance following confinement within the centre of the maze did not depart from random behaviour. This treatment presented the animals with task-related stimuli, which may have interfered directly with information stored in memory. Restraint within a weigh crate produced the most aroused and agitated behaviour in the animals, but resulted in negligible disruption to the memory of food sites. During this treatment, unlike the other treatments, there was no obvious focus ro the animals' attention, suggesting that 'attention-shifting' during a retention interval may affect memory storage or consolidation. Removal of some visual cues at the ends of each arm did not disrupt performance. This indicates that if pigs oriented themselves by visual cues, they did so using a wider range of cues than those visible through the ends of each arm. (C) 1999 Elsevier Science B.V. All rights reserved.