Huchen reaches maturity in his 4th or 5th year of age at the length 65-70cm. It spawns in April, when water reaches the temperature of 5-10 degrees. Spawning is very interesting, female digs a hole into the gravel bottom of the river, and it lies the eggs inside.
Spawning usually occurs in smaller creeks, where the young huchen also tend to stay until they mature, then they migrate into the bigger rivers where their parents live.
Even the slightest disruption in the water change the course of spawning and Huchen is unable to spawn. Lately the big problems are dams and hydroelectric power plants since they cut off the Huchen from the spawning grounds.
Huchen is an endemic species who only lives in the Danube basin. It was populated into other areas but usuccessfuly. In Slovenia it can be found in Sava Bohinjka, Sava, Savinja, Ljubljanica, Krka, Drava and Kolpa.