Effects of Current on the Movement of Speckled Trout

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Abstract
Abrupt change from still water to current, or the reverse, results in an increase in the activity of Salvelinus fontinalis. Sudden increase in current strength and in amount of turbulence also increases activity. In still water activity takes the form of random wandering. The increase in activity while in current is manifested by movement upstream. High water temperatures (20 °C. as against 17 °C. in the experiments) result in a decrease in, or even a lack of, increased activity.

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