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The relation of size (log weight, g) to metabolic rate (log O 2 -uptake, mg O 2 /hr) of sockeye salmon was found to have a continuous change in slope (0.78–0.97) with increasing activity at 15 C.The slope of the equation relating the 60-min sustained swimming speed (log speed, cm/sec) to length (cm) had a value of 0.50, demonstrating a rapid decrease in relative performance with increasing size.
J. R. Brett (Tue,) studied this question.