Volgazander
| Volgazander | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
.jpeg)
Volgazander ( Sander volgensis ) |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Sander volgensis | ||||||||||||
| ( Gmelin , 1789) |
The Volgazander or Steinschill ( Sander volgensis , Syn . : Stizostedion volgensis ) is a fish from the family of the real perch (Percidae).
features
The fish is smaller than the common pikeperch . It becomes a maximum of 40 to 50 centimeters long and weighs two kilograms. It has dark stripes on its body that do not dissolve into spots. It has no noticeably larger (fang) teeth in its mouth. The whole front gill cover is covered with scales. Even Francis Willughby had clearly stated that there are two types of walleye in the Austrian Danube.
Occurrence
He inhabits the deeper sandy river sections of the Danube , the Volga up to the Urals . He likes to hide in dense bank overhangs. Sometimes it can also be found in brackish water . The water temperature is comfortable for him between 8 and 22 ° C with a pH value between 7.2 and 8.0.
The Volga zander has only recently returned to the Czech Republic . It is mainly seen in the flat sections of the March and Thaya rivers .
In the Red List of the IUCN is Sander volgensis "not at risk" ( "least concern") classified. In 2004 the species was classified as "near threatened".
Reproduction
The Volgazander spawns in shallow places from April to May. As with the pikeperch, the male also takes care of the brood in the Volga zander.
Way of life
The Volgazander usually goes for food in the evening or at night. He also eats food in the coolest season, which consists mainly of fish and small crabs. It prefers to catch perch .
literature
- Stanislav Lusk et al: Status and protection of species and intraspecific diversity of the ichthyofauna in the Czech Republic. In: Maria João Collares-Pereira (Ed.): Conservation of Freshwater Fishes. Fishing News Books, Oxford 2002, ISBN 0-85238-286-3 .
Web links
- Volgazander on Fishbase.org (English)
- Sander volgensis in the Red List of Threatened Species of the IUCN 2009. Posted by: J. Freyhof, M. Kottelat, 2008. Accessed October 19 of 2009.
swell
- ↑ Stanislav Lusk et al: Status and protection of species and intraspecific diversity of the ichthyofauna in the Czech Republic. In: Maria João Collares-Pereira (Ed.): Conservation of Freshwater Fishes. Fishing News Books, Oxford 2002, ISBN 0-85238-286-3
- ↑ Sander volgensis in the endangered Red List species the IUCN 2009 Posted by: J. Freyhof, M. Kottelat, 2008. Accessed October 19 of 2009.
- ^ Stanislav Lusk, Lubomír Hanel, Vûra Lusková: Red List of the ichthyofauna of the Czech Republic. (PDF; 145 kB) In: Folia Zoologica. 53/2, 2004, pp. 215-226.