Schraetzer
Schrätzer ( Gymnocephalus schraetser )
The Schrätzer ( Gymnocephalus schraetser, also called Schratzbach ) is a freshwater fish of the family of Real perch ( Percidae ).
Features
The Schrätzer has a brass- yellow, elongated body. However, his head and his back has a green tone. Another feature of the Schrätzers are its small comb scales. Its mouth is inferior, its gill covers are taper to a point and covered each with a thorn. The body is covered with 3-4 narrow, discontinuous dark longitudinal stripes. The caudal fin is slightly forked and with dark dot rows. It has two connected dorsal fins, the first fin begins in front of the pelvic fins approach. The size of a Schrätzer is usually 15-25 cm, it can be a maximum of 30 cm and reaches a weight of up to 250 grams.
Distribution and habitat
Schrätzer occur exclusively in the Danube River and some tributaries. The Schrätzer lives in sandy- gravelly areas on the body of water larger watercourses. Due to the strong currents and the great depth of water in these areas, an accurate detection of the stocks is very difficult.
Reproduction
The Schrätzer one of the Frühjahrslaichern, its spawning season extends from April-May. They are looking at deep and flowed over gravel bars for spawning. The fish stick the sticky spawn in spawning cords to sunken branches and stones. The cock fish ( male fish) falls in the spawning season on by a brilliant, high-contrast body. The increased sedimentation of suspended shown to impair reproduction of Schrätzers.
Way of life
The Schrätzer lives in small groups in deep areas of the water body, but he draws at night in shallower areas. Schrätzer feed on small animals such as insect larvae, small crustaceans, molluscs or fish spawning.
Status
The Schrätzer out in Annexes II and V of the Fauna-Flora -Habitat Directive listed. The Schrätzer are additionally protected all year round due to the fisheries law.