Estimated swimming speeds of migrating adult sockeye salmon
Keyword(s):
Laboratory studies have indicated that the most efficient swimming speeds for adult sockeye salmon (Oncorhynchus nerka) are about 1.8 km/h, corresponding to 0.82 body length/s. Swimming is relatively efficient within the range of 1.0–2.6 km/h. To estimate the actual swimming speeds of migrants, ultrasonic tracking data for the ground speeds of 25 sockeye salmon returning to the Fraser River, British Columbia, were combined with simultaneous current speed data from drogues. There was significant variation in speed among fish but all estimates were within the range predicted from experimental results. The average estimated swimming speed, 66.75 cm/s (2.40 km/h) corresponded to 1.0 body length/s.
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