Some aspects of sustained training of rainbow trout, Salmo gairdneri Richardson |
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Authors: | R. Nahhas N. V. Jones G. Goldspink |
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Affiliation: | Zoology Department, University of Hull, Hull HU6 7RX, U.K. |
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Abstract: | Groups of 6-7 cm length rainbow trout, Salmo gairdneri Richardson, were simultaneously trained at four water velocities (0, 1·4, 2·2 and 3·5 Ls-1) for a period of 46 days. Oxygen consumption and swimming ability (fatigue time) were then measured. Only training at 3·5 Ls-1 increased the swimming ability of the fish. A study of the relative proportion of the white and red muscles indicated that the white muscle was increasing its mass at velocities in excess of 2·2 Ls-1. The oxygen consumption rate of the trained fish was lower than that of the untrained fish when considered over the whole velocity range. |
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