EVIDENCE FOR CELESTIAL AND MAGNETIC COMPASS ORIENTATION IN LAKE MIGRATING SOCKEYE SALMON FRY
EVIDENCE FOR CELESTIAL AND MAGNETIC COMPASS ORIENTATION IN LAKE MIGRATING SOCKEYE SALMON FRY
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DOI：
10.1007/bf00657119
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发表时间：
1980-01-01
期刊：
影响因子：
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通讯作者：
QUINN, TP
中科院分区：
文献类型：
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作者：
QUINN, TP
径向对称的四臂水箱旨在测试红鲑鱼 (O. nerka) 鱼苗的方向偏好，因为它们从砾石巢中出现并从河流迁移到湖泊后开始向湖上洄游。当在白天或夜间进行测试时，根据它们的迁徙情况，来自两种不同种群的鱼苗沿着罗盘方向移动，这些方向与它们在湖上迁徙中必须保持的方向相对应。在一天中的非迁徙时间测试的 1 个种群的方向偏好显然与鱼苗的岸上运动相对应。在阴天和晴天以及塑料罩下都能保持方向。 90度。地球磁场水平分量的逆时针移动与大约 90° 相关。鱼苗在夜间的平均运动方向发生变化，即使它们能看到天空。白天，只有在有盖水箱中进行测试的鱼在改变的区域中表现出重新定向的运动；尽管视野发生了变化，但在天空视野下进行的测试仍显示出地理上适当的运动模式。
Radially symmetrical, 4-armed tanks were designed for testing the directional preferences of sockeye salmon (O. nerka) fry as they commenced up-lake migrations following emergence from gravel nests and river migration to the lake. When tested during the day or night, as appropriate for their migration, fry from 2 different stocks moved in compass directions corresponding to the directions which they would have to maintain in their up-lake migration. The directional preferences of 1 population tested during the nonmigratory time of day apparently corresponded to the fry''s onshore movement. Orientation was maintained under both overcast and clear skies, and under plastic covers. A 90.degree. counter-clockwise shift in the horizontal component of the earth''s magnetic field was associated with approximately 90.degree. changes in the mean direction of movement of fry at night, even when they were given a view of the sky. During the day, only fish tested in covered tanks displayed redirected movements in the altered field; those tested with a view of the sky showed geographically appropriate movement patterns despite the shifted field.