Calibration processes in desert ant navigation: vector courses and systematic search
Calibration processes in desert ant navigation: vector courses and systematic search
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DOI：
10.1007/s00359-002-0340-8
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发表时间：
2002-10-01
影响因子：
2.1
通讯作者：
Vesely, M
中科院分区：
文献类型：
--
作者：
Wehner, R;Gallizzi, K;Vesely, M
本研究探讨沙漠蚂蚁的能力，以适应他们的路径整合系统的“开颚”的训练范式，其中的到达点（从巢）不符合出发点（巢）。离开后，蚂蚁首先逃离家园，然后开始系统地寻找巢穴。即使它们连续50多次进行这种绕圈训练，它们也不会直接返回巢中。它们的路径整合向量被稍微重新校准（指向更靠近巢穴的位置），它们的搜索模式变得不对称（搜索密度峰值向巢穴移动），但入站轨迹的二分结构不变。这些结果表明：（1）蚂蚁不能学习独立的入站和出站向量（即，彼此不是180度反转的矢量），（2）重新校准的矢量由蚂蚁的外出路线主导，（三）向量的重新校准和搜索几何结构的修改是快速且灵活的过程以及其路径积分器的实际状态。
This study investigates the ability of desert ants to adapt their path integration system to an "open-jaw" training paradigm, in which the point of arrival (from the nest) does not coincide with the point of departure (to the nest). Upon departure the ants first run off their home vector and then start a systematic search for the nest. Even if they are subjected to this training-around-a-circuit procedure for more than 50 times in succession, they never adopt straight homeward courses towards the nest. Their path integration vector gets slightly recalibrated (pointing a bit closer to the nest), and their search pattern gets asymmetric (with its search density peak shifted towards the nest), but the bipartite structure of the inbound trajectory invariably remains. These results suggest (1) that the ants cannot learn separate inbound and outbound vectors (i.e. vectors that are not 180degrees reversals of each other), (2) that the recalibrated vector is dominated by the ant's outbound course, (3) that the recalibration of the vector and the modification of the search geometry are fast and flexible processes occurring whenever the ant experiences a mismatch between the stored and actual states of its path integrator.