The Role of Celestial Compass Information in Cataglyphis Ants during Learning Walks and for Neuroplasticity in the Central Complex and Mushroom Bodies.
The Role of Celestial Compass Information in Cataglyphis Ants during Learning Walks and for Neuroplasticity in the Central Complex and Mushroom Bodies.
复制标题
DOI：
10.3389/fnbeh.2017.00226
复制
发表时间：
2017
影响因子：
3
通讯作者：
Rössler W
中科院分区：
文献类型：
--
作者：
Grob R;Fleischmann PN;Grübel K;Wehner R;Rössler W
中心觅食者面临的挑战是了解巢穴入口在周围环境中的位置，以便每次外出觅食时都能找到回家的路。为了在觅食生涯开始时获取导航信息，秃鹰在从内部工作者到觅食者的过渡过程中进行了学习行走。这些围绕着蚁穴入口的小圈圈会被精确得惊人的反向旋转反复打断，在此期间，蚂蚁会停下来，精确地盯着蚁穴入口——大概是为了了解蚁穴周围的地标性全景。然而，由于目前还没有完整的导航工具包，蚂蚁需要一个路径积分器的指南针组件的参考系统来校准它们的巢入口方向的目光。为了找到这个方向参考系统，我们系统地操纵了蚂蚁在自然栖息地学习行走时接收到的天窗信息，因为之前已经提出天体罗盘作为路径积分器的一部分可能提供这样一个参考系统。对不同学习行走元素的高速视频分析表明，即使排除了天窗偏振模式、紫外线光谱和太阳的位置，也不会改变回巢行为的准确性。因此，我们得出结论，野田C. noda最初使用不同的参考系统来调整它们的凝视方向。然而，通过比较学习散步前后中央复合体和蘑菇体的神经解剖学变化，发现紫外线照射和自然变化的极化模式对于诱导蚂蚁大脑这些高阶感觉整合中心的神经可塑性至关重要。这表明天体信息，特别是变化的偏振模式，在初始校准天体罗盘系统中起着至关重要的作用。
Central place foragers are faced with the challenge to learn the position of their nest entrance in its surroundings, in order to find their way back home every time they go out to search for food. To acquire navigational information at the beginning of their foraging career, Cataglyphis noda performs learning walks during the transition from interior worker to forager. These small loops around the nest entrance are repeatedly interrupted by strikingly accurate back turns during which the ants stop and precisely gaze back to the nest entrance—presumably to learn the landmark panorama of the nest surroundings. However, as at this point the complete navigational toolkit is not yet available, the ants are in need of a reference system for the compass component of the path integrator to align their nest entrance-directed gazes. In order to find this directional reference system, we systematically manipulated the skylight information received by ants during learning walks in their natural habitat, as it has been previously suggested that the celestial compass, as part of the path integrator, might provide such a reference system. High-speed video analyses of distinct learning walk elements revealed that even exclusion from the skylight polarization pattern, UV-light spectrum and the position of the sun did not alter the accuracy of the look back to the nest behavior. We therefore conclude that C. noda uses a different reference system to initially align their gaze directions. However, a comparison of neuroanatomical changes in the central complex and the mushroom bodies before and after learning walks revealed that exposure to UV light together with a naturally changing polarization pattern was essential to induce neuroplasticity in these high-order sensory integration centers of the ant brain. This suggests a crucial role of celestial information, in particular a changing polarization pattern, in initially calibrating the celestial compass system.
登录
查看更多内容
影响因子：
3
作者：
Fiore VG;Kottler B;Gu X;Hirth F
通讯作者：
Hirth F
影响因子：
3
作者：
de Vries L;Pfeiffer K;Trebels B;Adden AK;Green K;Warrant E;Heinze S
通讯作者：
Heinze S
影响因子：
9.2
作者：
Buehlmann, Cornelia;Graham, Paul;Knaden, Markus
通讯作者：
Knaden, Markus
影响因子：
2
作者：
Barth, M;Heisenberg, M
通讯作者：
Heisenberg, M
影响因子：
2.5
作者：
Heinze, Stanley;Reppert, Steven M.
通讯作者：
Reppert, Steven M.