Brook trout

Brook trout

The brook trout ( Salvelinus fontinalis ) belongs to the family of salmonids (salmon fish). In 1884 he was introduced from North America ( Brook Trout there or Northern Brook Trout called ).

Features

The average size is rare in freedom ( Europe ) greater than 35, more than 55 centimeters. The fish is usually not difficult over one kilogram. Crucial for the growth of char include water quality and quantity of food. The North American brook trout up to four pounds in weight. The maximum age under natural conditions is eight to ten years. The brook trout is a popular fish in aquaculture and is usually preferred culinary rainbow trout.

The char is one of the most beautiful and colorful representatives of salmonids. The colors change from population to population. His body shape is typical torpedo-shaped. Like all salmonids also has the char an adipose fin. The ventral fins have a striking red-orange colored hem with white border. Characteristic is the narrow black edge delineation of this white against the red of the fins. The back is brown and mottled olive. Brook trout have small scales and a large mouth opening.

Distribution and habitat

The brook trout living in cold and oxygen-rich both flowing and standing waters (such as mountain lakes ). He settled the waters of Europe, Asia and North America.

Way of life

The char hardly needs shelters and is therefore suitable as well as due to its extremely wide food spectrum, the colonization of straightened and rapidly flowing streams, and especially to the stocking of the source regions of our mountain streams. But since he is not one of the native species, no trimming should take place with this kind so as not to disturb the existing ecosystems. Compared with low pH values, it is more tolerant than the native brook trout. From the cross between brook trout and brown trout incurred sterile tiger trout, which owe their name to the striking golden yellow spot drawing. The brook trout is one of the Kieslaichern, the Rogner propose a spawning pit by twisting of the abdomen and also stirring up the base mud with the tail fin, before they begin to expel the eggs.

The diet consists mainly of planktonic crustaceans and soil organisms. In the summer often plays approach food such as locusts, a role. Larger brook trout also feed on fish (even of their own species ).

System

In addition to brook trout, there are other char species: the American lake trout ( Salvelinus namaycush ), the Arctic char ( Salvelinus alpinus ) as well as numerous local forms ( eg black Reuter ). The Alsatian char is a cross between a brook trout and lake trout.