真正的导航和磁力地图在刺的龙
Larry C Boles1, Kenneth J Lohmann
1Department of Biology, University of North Carolina, Chapel Hill, North Carolina 27599, USA. LBoles@email.unc.edu
Nature
|January 4, 2003
概括
刺状龙通过在迁移后可靠地返回捕获地点来表现出真正的导航能力. 这种非凡的能力很可能是由于磁性地图感,这是以前在无脊椎动物中未知的能力.
科学领域:
- 动物行为 动物行为
- 神经伦理学 神经伦理学
- 感官生物学 感官生物学
背景情况:
- 真正的导航,即在不熟悉的地区,在没有熟悉的线索的情况下向目标定位的能力,主要是在脊椎动物中观察到的.
- 无脊椎动物通常依赖于路径集成或地标识别等机制,这些机制不足以将它们迁移到未知的地区.
- 大多数动物,特别是无脊椎动物的真正导航背后的机制仍然不太清楚.
研究的目的:
- 为了调查刺龙 (Panulirus argus) 是否具备真正的导航能力.
- 探索地球磁场在龙导航中的潜在作用.
- 为了确定龙是否利用磁性地图感知方向.
主要方法:
- 尖龙被迁移到不熟悉的地点 (12-37公里),并观察到它们的方向朝着最初的捕获地点.
- 移动过程中的定向线索被最小化或消除.
- 龙被暴露在模仿特定地理位置相对于捕获地点的人造磁场中.
主要成果:
- 尖龙即使在迁移到不熟悉的位置并具有有限的感官信息后,也向捕获地点展示了可靠的定位.
- 被暴露在模拟捕获地点以北位置的磁场中的龙将自己定向向南.
- 被暴露在模拟捕获地点以南位置的磁场中的龙将自己定向向北.
结论:
- 刺状龙表现出真正的导航能力,这种能力以前被认为是脊椎动物独有的.
- 地球的磁场似乎是脊状龙磁图感觉的关键组成部分.
- 这一发现表明,基于磁性地图感的真实导航在动物王国中可能比以前所认为的更广泛.
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