The guidance of desert ants by extended landmarks.
The guidance of desert ants by extended landmarks.
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通过延伸的地标来引导沙漠蚂蚁。
DOI：
10.5167/uzh-690
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Rüdiger Wehner
中科院分区：
文献类型：
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作者：
Thomas S. Collett;M. Collett;Rüdiger Wehner
沙漠蚂蚁（Cataglyphisfortis）被训练成沿着一条固定的路线绕过障碍物到达喂食器。他们的归途轨迹记录在一个测试领域包含一个类似的障碍，无论是在培训或旋转通过22或45定向。在一组实验条件下，回家的轨迹旋转的方向的障碍，这意味着这个扩展的地标的视觉功能可以独立于指南针线索确定路线：障碍提供了一个“视觉场景”，控制蚂蚁的轨迹。在其他条件下，旋转后的轨迹是习惯罗盘方向和相对于旋转障碍物的方向之间的折衷。当蚂蚁被允许在被捕获和测试之前返回巢穴附近时，轨迹主要由视觉场景确定。当蚂蚁从喂食器中取出时，观察到妥协轨迹。看来，蚂蚁表现出至少两个独立的学习反应的障碍：（i）一个习惯的指南针方向触发的视线的障碍和（ii）视觉场景的方向，是指南针独立。我们认为，这些不同的学习反应的权重随着路径整合系统的状态而变化。
Desert ants (Cataglyphis fortis) were trained to follow a fixed route around a barrier to a feeder. Their homeward trajectories were recorded on a test field containing a similar barrier, oriented either as in training or rotated through 22 or 45 . Under one set of experimental conditions, the homeward trajectories rotated with the orientation of the barrier, implying that the visual features of this extended landmark can determine the route independently of compass cues: the barrier provided a "visual scene" that controlled the trajectories of the ants. Under other conditions, the trajectories after rotation were a compromise between the habitual compass direction and the direction with respect to the rotated barrier. Trajectories were determined primarily by the visual scene when ants were allowed to return close to the nest before being caught and tested. The compromise trajectories were observed when ants were taken from the feeder. It seems that ants exhibit at least two separate learnt responses to the barrier: (i) a habitual compass direction triggered by the sight of the barrier and (ii) a visual scene direction that is compass-independent. We suggest that the weighting accorded to these different learnt responses changes with the state of the path integration system.