Data from: Geomagnetic field influences upward movement of young Chinook salmon emerging from nests

Organisms use a variety of environmental cues to orient their movements in three-dimensional space. Here, we show that the upward movement of young Chinook salmon (Oncorhynchus tshawytscha) emerging from gravel nests is influenced by the geomagnetic field. Fish in the ambient geomagnetic field travelled farther upwards through substrate than did fish tested in a field with the vertical component inverted. This suggests that the magnetic field is one of several factors that influences emergence from the gravel, possibly by serving as an orientation cue that helps fish determine which way is up. Moreover, our work indicates that the Oncorhynchus species are sensitive to the magnetic field throughout their life cycle, and that it guides their movements across a range of spatial scales and habitats.生物通过多种环境线索实现三维空间内的运动定向。本研究发现，从砾石巢穴中孵化而出的幼年奇努克鲑（Chinook salmon，*Oncorhynchus tshawytscha*）的向上移动行为会受到地磁场的影响。处于自然地磁场环境中的受试幼鲑，在基质中向上移动的距离远大于垂直分量被反转的磁场环境下的受试个体。这表明地磁场是影响幼鲑从砾石中钻出的诸多因素之一，其可能通过提供定向线索，帮助幼鲑辨识向上方位。此外，本研究还表明，大麻哈鱼属（*Oncorhynchus*）物种在整个生命周期中均对地磁场具有感知能力，且地磁场可引导其在不同空间尺度与各类栖息生境中的运动行为。