Abstract
Biomanupulation is one of the most effective methods to improve quality of lake water, and thereby to restore the entire system, based on the top-down control in the ecological system of the lake. Although widely used in Europe, it has hardly been applied to Japanese lakes. This paper describes results of laboratory and pilot experiments intended to obtain necessary data to be able to apply the method in Japan. The results implied that biomanipulation is adequately effective even for Japanese lakes and these results may be used to predict quantitatively the effectiveness of the method.
