Lohmann K J
Neural and Behavioral Biology Program, University of Illinois, Urbana 61801.
J Exp Biol. 1991 Jan;155:37-49. doi: 10.1242/jeb.155.1.37.
Laboratory experiments were conducted to test the ability of loggerhead sea turtle hatchlings (Caretta caretta L.) to orient using the magnetic field of the earth. Hatchlings were tethered to a rotatable lever-arm apparatus which tracked swimming orientation in complete darkness. Hatchlings tested in the earth's magnetic field were nonrandomly oriented with a mean angle of 42 degrees; those tested under an earth-strength field with a reversed horizontal component were also nonrandomly oriented, but with a mean angle of 196 degrees. The distributions under the two magnetic field conditions were significantly different, indicating that loggerhead sea turtle hatchlings can detect the magnetic field of the earth and use it as a cue in orientation.
进行了实验室实验，以测试蠵龟幼龟（Caretta caretta L.）利用地球磁场进行定向的能力。幼龟被拴在一个可旋转的杠杆臂装置上，该装置在完全黑暗的环境中追踪游泳方向。在地球磁场中测试的幼龟呈非随机定向，平均角度为42度；在水平分量反向的地球强度磁场下测试的幼龟也呈非随机定向，但平均角度为196度。两种磁场条件下的分布有显著差异，表明蠵龟幼龟能够探测地球磁场并将其用作定向线索。
