Experimental evidence for geomagnetic orientation in juvenile salmon, Oncorhynchus tschawytscha Walbaum
Article first published online: 24 JAN 2006
Journal of Fish Biology
Volume 28, Issue 5, pages 607–623, May 1986
How to Cite
Taylor, P. B. (1986), Experimental evidence for geomagnetic orientation in juvenile salmon, Oncorhynchus tschawytscha Walbaum. Journal of Fish Biology, 28: 607–623. doi: 10.1111/j.1095-8649.1986.tb05196.x
- Issue published online: 24 JAN 2006
- Article first published online: 24 JAN 2006
- (Received 25 March 1985, Accepted 25 October 1985)
Juvenile chinook salmon, Oncorhynchus tschawytscha, kept under artificial light in a rectangular holding tank aligned east/west for 18 months, showed a preferred temporal and directional orientation of 270° with respect to water flow and the source of food.
Individual fish transferred from the holding/training tank to an unfamiliar circular test arena in another room devoid of local directional cues showed a mean of means preferred unimodal orientation of 264°.
Controlled re-introduction of individual stimuli revealed a hierarchy of orientation cues; one of these was a response to magnetism. A 90° clockwise shift in the horizontal component of the earth's magnetic field was followed by a significant change in the mean of means axial orientation, for the fish under test, from 258°/78° to 354°/174°. After restoration of the normal magnetic field the mean of means axial orientation reverted to 274°/94°.