Rock perch
| Rock perch | ||||||||||||
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Rock perch ( Ambloplites rupestris ) |
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| Scientific name | ||||||||||||
| Ambloplites rupestris | ||||||||||||
| ( Rafinesque , 1817) |
The stone perch ( Ambloplites rupestris ) is a freshwater fish from the sunfish family (Centrarchidae). It is native to eastern North America and introduced by humans in other regions of the United States and Europe.
features
The rock perch is usually 6 to 10 inches long. The maximum length is 43 cm with a weight of 1.36 kg. Its body, covered with comb scales , is high back and flattened at the sides. The basic color is gray-green to brownish with rows of dark pits on the flanks. The gill covers have a brass-colored shine and have a black spot in the rear corner, which is outlined in gold in male rock bass. The eyes are red to orange, the unpaired fins are greenish to brownish yellow and often have a dark border.
- Fin formula : dorsal X – XI / 10–12, anal V / 9–11.
- Scale formula : mLR 39–43.
Habitat
The stone perch inhabits streams rich in vegetation, small to medium-sized rivers with rocky bottoms and the overgrown banks of lakes. It feeds on small crustaceans, insects and fish.
habitat
The rock bass is native to North America. There you can find it from Manitoba to Québec (both Canada ) and from there the Mississippi catchment area further south to the mouth in Louisiana ( USA ) and to the east coast. He is also naturalized in Colorado and Wyoming in the United States . In the 19th century the species came to Europe. In 1877 it was imported to France . However, the animals were not bred there. 10 years later, Max received 20 individuals from Virginia (USA) from the Borne in Germany . He was able to raise 12 of these to sexual maturity and use them to breed numerous offspring. The current occurrence in Europe is considered to be inconsistent or extinct. If there are populations, they are most likely to be found in the south west of England .
literature
- Andreas Arnold: Naturalized fish species. Die Neue Brehm Bücherei 602. Ziemsen Verlag, Wittenberg 1990, ISBN 3-7403-0236-4 .
- Günther Sterba : The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
Web links
- Stone perch on Fishbase.org (English)
- Ambloplites rupestris inthe IUCN 2013 Red List of Threatened Species . Posted by: NatureServe, 2011. Retrieved February 7, 2014.