Migratory Reed Warblers Need Intact Trigeminal Nerves to Correct for a 1,000 km Eastward Displacement
Migratory Reed Warblers Need Intact Trigeminal Nerves to Correct for a 1,000 km Eastward Displacement
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DOI：
10.1371/journal.pone.0065847
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发表时间：
2013-06-26
期刊：
影响因子：
3.7
通讯作者：
Mouritsen, Henrik
中科院分区：
文献类型：
--
作者：
Kishkinev, Dmitry;Chernetsov, Nikita;Mouritsen, Henrik
一些研究表明，有经验的夜间迁徙鸣禽可以确定自己的位置，但它仍然是一个谜，线索和感觉机制，他们使用，特别是那些用来确定经度（东西位置）。一个潜在的解决方案是使用磁图或路标机制，就像海龟中记录的那样。夜间迁徙的鸣禽的眼睛里有一个磁罗盘，还有一个未知生物学功能的第二种磁感觉，涉及三叉神经（V1）的眼分支。V1能参与确定东西位置吗？我们对57只欧亚苇莺（Acrocephalus scirpaceus）进行了V1和V1不切段的置换。假手术组的鸟在移位后纠正了它们朝向繁殖区的方向，就像未经处理的对照组一样。相比之下，V1切片的鸡没有校正位移。它们在移位后的方向与它们在捕获地点的方向相同。因此，完整的三叉神经眼分支是必要的，以检测1,000公里的东位移在这个夜间迁徙的鸣禽。我们的研究结果表明，V1携带地图相关的信息，用于大规模的地图或路标的意义，苇莺需要确定他们的大致地理位置和/或东西坐标。
Several studies have shown that experienced night-migratory songbirds can determine their position, but it has remained a mystery which cues and sensory mechanisms they use, in particular, those used to determine longitude (east-west position). One potential solution would be to use a magnetic map or signpost mechanism like the one documented in sea turtles. Night-migratory songbirds have a magnetic compass in their eyes and a second magnetic sense with unknown biological function involving the ophthalmic branch of the trigeminal nerve (V1). Could V1 be involved in determining east-west position? We displaced 57 Eurasian reed warblers (Acrocephalus scirpaceus) with or without sectioned V1. Sham operated birds corrected their orientation towards the breeding area after displacement like the untreated controls did. In contrast, V1-sectioned birds did not correct for the displacement. They oriented in the same direction after the displacement as they had done at the capture site. Thus, an intact ophthalmic branch of the trigeminal nerve is necessary for detecting the 1,000 km eastward displacement in this night-migratory songbird. Our results suggest that V1 carries map-related information used in a large-scale map or signpost sense that the reed warblers needed to determine their approximate geographical position and/or an east-west coordinate.