Brown Trout – Salmo trutta fario
This is not an autochthonous trout of our waters. It was first brought here at the beginning of the 20th century. It successfully crossbreeds with the marble trout and their offspring are fertile. This is the reason why the brown trout is such a threat to the marble trout and why it has become illegal to introduce it into waters of the Adriatic river system in Slovenia.
Except for five locations with pure marble trout, the brown trout is found in all waters of the sector.
Smaller fish feed mainly on bottom-dwelling organisms and aquatic insects while larger ones mostly eat other fish.
In our waters it spawns from the middle of December to the end of January. The lake form of the brown trout spawns from the end of October to the beginning of December.
In our waters it reaches up to 70cm and 6kg.