This is a natural adaptation of common river trout. Adults spend the warmer period of the year when streams lack water in the coolness of lakes. In the autumn, the return to the streams to lay their eggs. Eggs hatch at the end of the winter.
The riparian Trout population in the lakes of Saint-Point and Remoray have sharply declined since the 70s/80s. The quality of water in the lakes as well as the physical qualities of streams in which they would reproduce has now largely deteriorated.