ABSTRACT
It has been reported that in the rainbow trout, Salmo gairdneri, exercise brings about almost a fivefold increase in the transfer factor of the gills (Randall, Holeton & Stevens, 1967). Five times as much oxygen diffuses from the water to the blood per unit of concentration difference. This suggests that during exercise there is an increase in the area of the functional respiratory surface; this could be achieved if there was an increase in the ventilation and perfusion of some or all of the gills.
Copyright © 1970 The Company of Biologists Ltd.
1970
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