On the Propagation of Fish due to Liberating Fry in Four Lakes, Biwako, Kasumigaura, Kitaura and Suwako (Further Note)

Abstract

This study was made to show that the propagation of a species due to liberating fry in a lake is checked by another species which naturally propagates itself in the lake and has a remarkable tendency to increase or decrease together with the artificially propagated species.