The use of celestial and magnetic cues by orienting sockeye salmon smolts
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Yearling sockeye salmon (smolts),Oncorhynchus nerka, trapped at the outlet of Babine Lake, Canada, on their way from the lake downstream to the ocean were tested in round orientation tanks. With a view of the sky, the smolts oriented towards the lake's outlet in the normal magnetic field (Fig. 3) and in a field rotated 90 ° counterclockwise (Fig. 4).
Under opaque covers, the smolts displayed a bimodal distribution. In the normal magnetic field, they oriented towards or away from the lake's outlet (Fig. 5). In the altered field, the axis of the distribution was rotated 56 ° away from the axis in the normal field (Fig. 6).
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- The use of celestial and magnetic cues by orienting sockeye salmon smolts
Journal of comparative physiology
Volume 147, Issue 4 , pp 547-552
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