This trout lives in our waterways and is an indigenous species. This stock is a part of our heritage. Its size varies with the quality of the water, fishing pressures, and the nature of the riverbed (hiding-places). In the summer, it hunts in white water and on the surface, and catches insects. In the winter, it eats larvae on the bottom. Reproduction begins in November and is staggered throughout the winter. The female lays its eggs on a gravelly stretch of the riverbed, into which it has dug a pit using its caudal fin. The male deposits its milt over the eggs. Once they are fertilised, the eggs are covered with gravel. Reproductive success depends on variations in the water flow and especially on the risk of the spawning areas drying out in dry winters.